daTbox2 handling

files.cmake

@@ -1472,6 +1472,9 @@ set(DUSK_FILES
         src/dusk/mods/loader/native_module.hpp
         src/dusk/mods/loader/prepatch.cpp
         src/dusk/mods/loader/prepatch.hpp
+        src/dusk/mods/item.hpp
+        src/dusk/mods/item_checks.cpp
+        src/dusk/mods/item_gives.cpp
         src/dusk/mods/log_buffer.cpp
         src/dusk/mods/log_buffer.hpp
         src/dusk/mods/manifest.cpp
@@ -1483,6 +1486,8 @@ set(DUSK_FILES
         src/dusk/mods/svc/gfx.cpp
         src/dusk/mods/svc/hook.cpp
         src/dusk/mods/svc/host.cpp
+        src/dusk/mods/svc/item.cpp
+        src/dusk/mods/svc/item.hpp
         src/dusk/mods/svc/log.cpp
         src/dusk/mods/svc/overlay.cpp
         src/dusk/mods/svc/registry.cpp

include/d/actor/d_a_e_hp.h

@@ -96,6 +96,9 @@ public:
     /* 0xDE0 */ cXyz field_0xde0;
     /* 0xDEC */ u8 field_0xdec[0xdf9 - 0xdec];
     /* 0xDF9 */ u8 field_0xdf9;
+#if TARGET_PC
+    bool mItemCheckOverridden;
+#endif
 };
 
 STATIC_ASSERT(sizeof(daE_HP_c) == 0xdfc);

include/d/actor/d_a_obj_life_container.h

@@ -88,6 +88,11 @@ private:
     /* 0x99C */ dPa_followEcallBack mEffect2;
     /* 0x9B0 */ Z2SoundObjSimple mSound;
     /* 0x9D0 */ u8 mIsHookCarry;
+#if TARGET_PC
+    u8 mOriginalItemNo;
+    bool mItemOverridden;
+    bool mOverrideHover;
+#endif
 };
 
 STATIC_ASSERT(sizeof(daObjLife_c) == 0x9d4);

include/d/actor/d_a_tbox.h

@@ -194,6 +194,9 @@ private:
     /* 0x9FC */ u8 field_0x9fc;
     /* 0x9FD */ u8 field_0x9fd;
     /* 0xA00 */ Mtx mDrawMtx;
+#if TARGET_PC
+    u8 mOriginalItemNo;
+#endif
 };
 
 STATIC_ASSERT(sizeof(daTbox_c) == 0xA30);

include/d/actor/d_a_tbox2.h

@@ -83,6 +83,9 @@ private:
     /* 0xAC0 */ u8 field_0xAC0[0xAC4 - 0xAC0];
     /* 0xAC4 */ int mStaffIdx;
     /* 0xAC8 */ dBgW* mBoxBgW;
+#if TARGET_PC
+    u8 mOriginalItemNo;
+#endif
 };
 
 STATIC_ASSERT(sizeof(daTbox2_c) == 0xACC);

include/d/d_a_item_static.h

@@ -145,6 +145,10 @@ public:
     /* 0x9BC */ u8 field_0x9bc[4];
     /* 0x9C0 */ u8 field_0x9c0;
     /* 0x9C1 */ u8 field_0x9c1;
+#if TARGET_PC
+    u8 mOriginalItemNo;
+    bool mItemOverridden;
+#endif
 };  // Size: 0x9C4
 
 #endif /* D_A_D_A_ITEM_STATIC_H */

include/d/d_a_shop_item_static.h

@@ -50,6 +50,9 @@ public:
     csXyz* getRotateP();
     cXyz* getPosP();
     const char* getShopArcname();
+#if TARGET_PC
+    const ResourceData& getResourceData() const;
+#endif
     u16 getHeapSize();
     void CreateInit();
     void set_mtx();
@@ -110,6 +113,10 @@ private:
     /* 0x960 */ s16 mAngleX;
     /* 0x962 */ s16 mAngleY;
     /* 0x964 */ u8 mShopItemID;
+#if TARGET_PC
+    ResourceData mOverrideData;
+    bool mItemOverridden;
+#endif
 };
 
 int CheckShopItemCreateHeap(fopAc_ac_c* i_this);

include/d/d_item.h

@@ -11,7 +11,9 @@ public:
     static DUSK_GAME_DATA u8* mData;
 };
 
-void execItemGet(u8 item_id);
+class fopAc_ac_c;
+void execItemGet(
+    u8 item_id IF_DUSK_ARG(u32 item_give_tag = 0) IF_DUSK_ARG(fopAc_ac_c* giver = NULL));
 
 void item_func_HEART();
 void item_func_GREEN_RUPEE();

include/f_op/f_op_actor.h

@@ -318,6 +318,11 @@ public:
     /* 0x566 */ s8 field_0x566;
     /* 0x567 */ s8 field_0x567;
 
+#if TARGET_PC
+    u32 mItemGiveTag;
+    u8 mItemGiveOriginalNo;
+#endif
+
 #if !__MWERKS__
     s8 actor_last_base_field;
 #endif

include/f_op/f_op_actor_mng.h

@@ -79,6 +79,10 @@ struct fopAcM_prm_class {
     /* 0x1C */ fpc_ProcID parent_id;
     /* 0x20 */ s8 argument;
     /* 0x21 */ s8 room_no;
+#if TARGET_PC
+    u32 mItemGiveTag;
+    u8 mItemGiveOriginalNo;
+#endif
 };
 
 struct fopAcM_search4ev_prm {
@@ -516,8 +520,9 @@ s32 fopAcM_SearchByName(s16 i_procName, fopAc_ac_c** i_outActor);
 fopAcM_prm_class* fopAcM_CreateAppend();
 
 fopAcM_prm_class* createAppend(u16 i_setId, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                               const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                               fpc_ProcID i_parentId);
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
+    fpc_ProcID i_parentId IF_DUSK_ARG(u32 i_itemGiveTag = 0)
+        IF_DUSK_ARG(u8 i_itemOriginalNo = 0xFF));
 
 void fopAcM_Log(fopAc_ac_c const* i_actor, char const* i_message);
 
@@ -526,19 +531,20 @@ s32 fopAcM_delete(fopAc_ac_c* i_actor);
 s32 fopAcM_delete(fpc_ProcID i_actorID);
 
 fpc_ProcID fopAcM_create(s16 i_procName, u16 i_setId, u32 i_parameters, const cXyz* i_pos,
-                         int i_roomNo, const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                         createFunc i_createFunc);
+    int i_roomNo, const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
+    createFunc i_createFunc IF_DUSK_ARG(u32 i_itemGiveTag = 0));
 
 fpc_ProcID fopAcM_create(s16 i_procName, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                         const csXyz* i_angle, const cXyz* i_scale, s8 i_argument);
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument IF_DUSK_ARG(u32 i_itemGiveTag = 0));
 
 inline fpc_ProcID fopAcM_Create(s16 i_procName, createFunc i_createFunc, void* params) {
     return fpcM_Create(i_procName, i_createFunc,params);
 }
 
 fopAc_ac_c* fopAcM_fastCreate(s16 i_procName, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                              const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                              createFunc i_createFunc, void* i_createFuncData);
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument, createFunc i_createFunc,
+    void* i_createFuncData IF_DUSK_ARG(u32 i_itemGiveTag = 0)
+        IF_DUSK_ARG(u8 i_itemOriginalNo = 0xFF));
 
 fopAc_ac_c* fopAcM_fastCreate(const char* i_actorname, u32 i_parameters, const cXyz* i_pos,
                               int i_roomNo, const csXyz* i_angle, const cXyz* i_scale,
@@ -623,11 +629,11 @@ fopAc_ac_c* fopAcM_getItemEventPartner(const fopAc_ac_c*);
 fopAc_ac_c* fopAcM_getEventPartner(const fopAc_ac_c*);
 
 fpc_ProcID fopAcM_createItemForPresentDemo(cXyz const* i_pos, int i_itemNo, u8 param_2,
-                                           int i_itemBitNo, int i_roomNo, csXyz const* i_angle,
-                                           cXyz const* i_scale);
+    int i_itemBitNo, int i_roomNo, csXyz const* i_angle,
+    cXyz const* i_scale IF_DUSK_ARG(u32 i_itemGiveTag = 0));
 
 fpc_ProcID fopAcM_createItemForTrBoxDemo(cXyz const* i_pos, int i_itemNo, int i_itemBitNo,
-                                         int i_roomNo, csXyz const* i_angle, cXyz const* i_scale);
+    int i_roomNo, csXyz const* i_angle, cXyz const* i_scale IF_DUSK_ARG(u32 i_itemGiveTag = 0));
 
 u8 fopAcM_getItemNoFromTableNo(u8 i_tableNo);
 
@@ -641,11 +647,12 @@ fpc_ProcID fopAcM_createItemFromTable(cXyz const* i_pos, int i_tableNo, int i_it
                                       bool i_createDirect);
 
 fpc_ProcID fopAcM_createDemoItem(const cXyz* i_pos, int i_itemNo, int i_itemBitNo,
-                                 const csXyz* i_angle, int i_roomNo, const cXyz* scale, u8 param_7);
+    const csXyz* i_angle, int i_roomNo, const cXyz* scale,
+    u8 param_7 IF_DUSK_ARG(u32 i_itemGiveTag = 0));
 
 fpc_ProcID fopAcM_createItemForBoss(const cXyz* i_pos, int i_itemNo, int i_roomNo,
-                                    const csXyz* i_angle, const cXyz* i_scale, f32 i_speedF,
-                                    f32 i_speedY, int param_8);
+    const csXyz* i_angle, const cXyz* i_scale, f32 i_speedF, f32 i_speedY,
+    int param_8 IF_DUSK_ARG(const char* i_itemCheckName = NULL));
 
 fpc_ProcID fopAcM_createItemForMidBoss(const cXyz* i_pos, int i_itemNo, int i_roomNo,
                                        const csXyz* i_angle, const cXyz* i_scale, int param_6,

include/global.h

@@ -256,4 +256,17 @@ using std::isnan;
 #define DUSK_CONST IF_DUSK(const)
 #define DUSK_CONSTEXPR IF_DUSK(constexpr)
 
+#if TARGET_PC && defined(DUSK_BUILDING_GAME)
+#include "dusk/mods/item.hpp"
+#define DUSK_ITEM_CHECK(name, item_no, giver)                                                      \
+    (item_no) = ::dusk::mods::item_check(name, (item_no), giver)
+#define DUSK_ITEM_CHECK_EXPR(name, item_no, giver)                                                 \
+    (::dusk::mods::item_check(name, (item_no), giver))
+#define DUSK_GIVE_TAG(name) IF_DUSK_ARG(::dusk::mods::item_give_tag(name))
+#else
+#define DUSK_ITEM_CHECK(name, item_no, giver)
+#define DUSK_ITEM_CHECK_EXPR(name, item_no, giver) (item_no)
+#define DUSK_GIVE_TAG(name)
+#endif
+
 #endif

sdk/include/mods/svc/item.h

@@ -0,0 +1,94 @@
+#pragma once
+
+#include <mods/api.h>
+
+#ifdef __cplusplus
+#include <mods/service.hpp>
+#endif
+
+#define ITEM_SERVICE_ID "dev.twilitrealm.dusklight.item"
+#define ITEM_SERVICE_MAJOR 2u
+#define ITEM_SERVICE_MINOR 0u
+
+/* 0 is never a valid handle. */
+typedef uint64_t ItemCheckHandle;
+typedef uint64_t ItemGiveHandle;
+
+/*
+ * Item check resolution and inventory grants.
+ *
+ * Check names are case-sensitive. Resolvers must be free of side effects because the game may
+ * resolve a check more than once, including once for display and again when granting the item.
+ * Registrations and pending grants are removed when the calling mod is detached. Callbacks run
+ * on the game thread.
+ */
+
+/* Host-owned callback data, valid only for the duration of the callback. */
+typedef struct ItemCheckInfo {
+    const char* name;
+    const void* giver_actor; /* fopAc_ac_c*, or NULL when unavailable */
+    uint8_t vanilla_item;
+    uint8_t current_item;
+} ItemCheckInfo;
+
+/* Return true and write out_item to replace current_item, or false to leave it unchanged. */
+typedef bool (*ItemCheckResolveFn)(
+    ModContext* ctx, const ItemCheckInfo* info, uint8_t* out_item, void* user_data);
+
+typedef enum ItemGiveOrigin {
+    ITEM_GIVE_ORIGIN_GAME = 0,
+    ITEM_GIVE_ORIGIN_QUEUE = 1,
+    ITEM_GIVE_ORIGIN_QUEUE_SILENT = 2,
+} ItemGiveOrigin;
+
+/* Host-owned callback data, valid only for the duration of the callback. */
+typedef struct ItemGiveInfo {
+    const char* check_name;  /* NULL when the grant is not attributed to a check */
+    const void* giver_actor; /* fopAc_ac_c*, or NULL when unavailable */
+    uint8_t item;
+    uint8_t origin; /* ItemGiveOrigin */
+} ItemGiveInfo;
+
+typedef void (*ItemGiveObserveFn)(ModContext* ctx, const ItemGiveInfo* info, void* user_data);
+
+enum {
+    /* Apply the inventory change without a get-item demo. */
+    ITEM_GIVE_SILENT = 1u << 0,
+    /* Resolve item_no as the named check's vanilla item when the queue entry is dispatched. */
+    ITEM_GIVE_RESOLVE = 1u << 1,
+};
+
+typedef struct ItemService {
+    ServiceHeader header;
+
+    /* Set or replace the calling mod's fixed override for name. */
+    ModResult (*set_check_override)(ModContext* ctx, const char* name, uint8_t item_no);
+
+    ModResult (*clear_check_override)(ModContext* ctx, const char* name);
+
+    /* Register for name, or for every check when name is NULL. out_handle may be NULL. */
+    ModResult (*set_check_resolver)(ModContext* ctx, const char* name, ItemCheckResolveFn fn,
+        void* user_data, ItemCheckHandle* out_handle);
+
+    ModResult (*clear_check_resolver)(ModContext* ctx, ItemCheckHandle handle);
+
+    /* Resolve without granting an item or notifying give observers. */
+    ModResult (*resolve_check)(
+        ModContext* ctx, const char* name, uint8_t vanilla_item, uint8_t* out_item);
+
+    /*
+     * Add a grant to the global FIFO. check_name may be NULL unless ITEM_GIVE_RESOLVE is set.
+     * Returns MOD_UNAVAILABLE when the queue is full. Entries wait until gameplay is in a safe
+     * state and are cleared when the active save slot changes.
+     */
+    ModResult (*give_item)(
+        ModContext* ctx, const char* check_name, uint8_t item_no, uint32_t flags);
+
+    /* Observe inventory grants. out_handle may be NULL. */
+    ModResult (*observe_gives)(
+        ModContext* ctx, ItemGiveObserveFn fn, void* user_data, ItemGiveHandle* out_handle);
+
+    ModResult (*unobserve_gives)(ModContext* ctx, ItemGiveHandle handle);
+} ItemService;
+
+MOD_DECLARE_SERVICE(ItemService, svc_item, ITEM_SERVICE_ID, ITEM_SERVICE_MAJOR, ITEM_SERVICE_MINOR);

src/d/actor/d_a_alink_demo.inc

@@ -2260,6 +2260,12 @@ int daAlink_c::procCoGetItemInit() {
     s16 var_r22 = 0;
     BOOL var_r31 = FALSE;
     BOOL var_r30 = FALSE;
+#if TARGET_PC
+    // Queued grants have no event partner, so create the demo item from the event's GtItm.
+    if (dusk::mods::item_give_queue_dispatching()) {
+        mDemo.setParam0(0x100);
+    }
+#endif
     if (mProcID == PROC_GET_ITEM || mProcID == PROC_INSECT_CATCH ||
         (mProcID == PROC_PREACTION_UNEQUIP && !checkNoUpperAnime()))
     {
@@ -2299,7 +2305,7 @@ int daAlink_c::procCoGetItemInit() {
         }
 
         fpc_ProcID item_partner_id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 0, -1,
-                                                              fopAcM_GetRoomNo(this), NULL, NULL);
+            fopAcM_GetRoomNo(this), NULL, NULL IF_DUSK_ARG(dusk::mods::item_give_queue_take_tag()));
         if (item_partner_id != fpcM_ERROR_PROCESS_ID_e) {
             dComIfGp_event_setItemPartnerId(item_partner_id);
         }

src/d/actor/d_a_b_ds.cpp

@@ -4084,6 +4084,10 @@ void daB_DS_c::executeBattle2Dead() {
             camera->mCamera.SetTrimSize(0);
             dComIfGp_event_reset();
             dComIfGs_onStageBossEnemy(0x13);
+#if TARGET_PC
+            // This reward has no original grant at this point in the cutscene.
+            dusk::mods::item_check_enqueue("Arbiters Grounds Dungeon Reward", dItemNo_NONE_e);
+#endif
             /* dSv_event_flag_c::F_0265 - Arbiter's Grounds - Arbiter's Grounds clear */
             dComIfGs_onEventBit(0x2010);
             fopAcM_delete(this);

src/d/actor/d_a_demo_item.cpp

@@ -170,7 +170,7 @@ void daDitem_c::actionEvent() {
 
     if (chkDead()) {
         if (!chkArgFlag(0x1)) {
-            execItemGet(m_itemNo);
+            execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         }
 
         if (m_itemNo == dItemNo_KAKERA_HEART_e) {

src/d/actor/d_a_e_hp.cpp

@@ -726,11 +726,18 @@ void daE_HP_c::executeDead() {
             fopAcM_onSwitch(this, bitSw);
         }
 
-        dComIfGs_addPohSpiritNum();
+#if TARGET_PC
+        mItemCheckOverridden =
+            dusk::mods::item_check_poe(bitSw, dItemNo_POU_SPIRIT_e, this) != dItemNo_POU_SPIRIT_e;
+        if (mItemCheckOverridden) {
+            dusk::mods::item_check_enqueue_poe(bitSw, dItemNo_POU_SPIRIT_e);
+        } else
+#endif
+            dComIfGs_addPohSpiritNum();
 
         field_0x784 = -1;
 
-        if (dComIfGs_getPohSpiritNum() == 20) {
+        if (dComIfGs_getPohSpiritNum() == 20 IF_DUSK(&&!mItemCheckOverridden)) {
             dComIfGs_onEventBit(dSv_event_flag_c::saveBitLabels[0x1c9]);
         }
 
@@ -752,13 +759,13 @@ void daE_HP_c::executeDead() {
                     field_0x788 = 1;
                 }
             }
-        } else if (field_0x788 != 0) {
+        } else if (field_0x788 != 0 IF_DUSK(|| mItemCheckOverridden)) {
             fopAcM_createDisappear(this, &current.pos, 8, 3, 0xff);
             fopAcM_delete(this);
         } else {
             if (field_0x784 == -1) {
-                field_0x784 = fopAcM_createItemForPresentDemo(&current.pos, dItemNo_POU_SPIRIT_e, 0, -1,
-                                                              -1, 0, 0);
+                field_0x784 = fopAcM_createItemForPresentDemo(&current.pos, dItemNo_POU_SPIRIT_e, 0,
+                    -1, -1, 0, 0 IF_DUSK_ARG(dusk::mods::item_give_tag_poe(bitSw)));
             }
 
             if (fopAcM_IsExecuting(field_0x784) != FALSE) {

src/d/actor/d_a_e_po.cpp

@@ -1132,12 +1132,20 @@ static void e_po_dead(e_po_class* i_this) {
             camera_player->mCamera.Start();
             camera_player->mCamera.SetTrimSize(0);
             dComIfGp_event_reset();
-            dComIfGs_addPohSpiritNum();
+#if TARGET_PC
+            if (dusk::mods::item_check_poe(i_this->BitSW, dItemNo_POU_SPIRIT_e, a_this) ==
+                dItemNo_POU_SPIRIT_e)
+            {
+#endif
+                dComIfGs_addPohSpiritNum();
 #if !PLATFORM_SHIELD
             if (dComIfGs_getPohSpiritNum() == 0x14) {
                 /* dSv_event_flag_c::F_0457 - Castle Town - Revived cat */
                 dComIfGs_onEventBit(dSv_event_flag_c::saveBitLabels[457]);
             }
+#endif
+#if TARGET_PC
+            }
 #endif
             daPy_getPlayerActorClass()->cancelOriginalDemo();
         } else if (mArg0Check(i_this, 0) != 0) {
@@ -1265,8 +1273,15 @@ static void e_po_dead(e_po_class* i_this) {
             }
         } else {
             if (i_this->field_0x75C == -1) {
+#if TARGET_PC
+                const u8 itemNo =
+                    dusk::mods::item_check_poe(i_this->BitSW, dItemNo_POU_SPIRIT_e, a_this);
+                i_this->field_0x75C = fopAcM_createItemForPresentDemo(&a_this->current.pos, itemNo,
+                    0, -1, -1, NULL, NULL, dusk::mods::item_give_tag_poe(i_this->BitSW));
+#else
                 i_this->field_0x75C = fopAcM_createItemForPresentDemo(&a_this->current.pos, 0xE0, 0,
                                                                       -1, -1, NULL, NULL);
+#endif
             }
             if (fopAcM_IsExecuting(i_this->field_0x75C)) {
                 i_this->field_0x762 =

src/d/actor/d_a_e_rdb.cpp

@@ -1250,7 +1250,9 @@ static void demo_camera(e_rdb_class* i_this) {
             }
 
             if (iVar1 != 0) {
-                daPy_getPlayerActorClass()->changeDemoMode(11, 32, 0, 0);
+                daPy_getPlayerActorClass()->changeDemoMode(11,
+                    DUSK_ITEM_CHECK_EXPR("bulblin_key:D_MN09", dItemNo_SMALL_KEY_e, &i_this->enemy), 0,
+                    0);
                 i_this->mDemoMode = 12;
                 i_this->field_0x10aa = 0;
                 i_this->field_0xfe5 = 1;

src/d/actor/d_a_e_th_ball.cpp

@@ -931,7 +931,9 @@ static void get_demo(e_th_ball_class* i_this) {
     case 0:
         break;
     case 1:
-        demo_id = fopAcM_createItemForTrBoxDemo(&i_this->current.pos, dItemNo_IRONBALL_e, -1, fopAcM_GetRoomNo(i_this), NULL, NULL);
+        demo_id = fopAcM_createItemForTrBoxDemo(&i_this->current.pos,
+            DUSK_ITEM_CHECK_EXPR("ball_and_chain:D_MN11", dItemNo_IRONBALL_e, i_this), -1,
+            fopAcM_GetRoomNo(i_this), NULL, NULL DUSK_GIVE_TAG("ball_and_chain:D_MN11"));
         JUT_ASSERT(1670, demo_id != fpcM_ERROR_PROCESS_ID_e);
         i_this->mDemoMode = 2;
         break;

src/d/actor/d_a_npc_aru.cpp

@@ -1744,7 +1744,9 @@ int daNpc_Aru_c::cutSpeakTo(int i_staffID) {
                 switch (eventId) {
                     case 1:
                         if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                            mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+                            DUSK_ITEM_CHECK("goats_reward", itemNo, this);
+                            mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemNo,
+                                0, -1, -1, NULL, NULL DUSK_GIVE_TAG("goats_reward"));
                         }
 
                         if (fopAcM_IsExecuting(mItemPartnerId)) {

src/d/actor/d_a_npc_ashB.cpp

@@ -1001,8 +1001,9 @@ BOOL daNpcAshB_c::EvCut_Appear(int i_staffID) {
         case '0008':
             local_30[0] = 0;
             if (mFlow.getEventId(local_30) == 1) {
-                mItemPartnerId =
-                    fopAcM_createItemForPresentDemo(&current.pos, local_30[0], 0, -1, -1, 0, 0);
+                DUSK_ITEM_CHECK("ashei_sketch", local_30[0], this);
+                mItemPartnerId = fopAcM_createItemForPresentDemo(
+                    &current.pos, local_30[0], 0, -1, -1, 0, 0 DUSK_GIVE_TAG("ashei_sketch"));
                 dComIfGp_event_setItemPartnerId(mItemPartnerId);
                 mItemPartnerId = -1;
             }

src/d/actor/d_a_npc_chin.cpp

@@ -1804,8 +1804,19 @@ int daNpcChin_c::_Evt_GameSucceed_CutMain(const int& param_0) {
                 itemId1 = 0;
             }
 
+#if TARGET_PC
+            const char* itemCheckName = nullptr;
+            if (itemId1 == dItemNo_ARROW_LV2_e) {
+                itemCheckName = "star_reward_1";
+            } else if (itemId1 == dItemNo_ARROW_LV3_e) {
+                itemCheckName = "star_reward_2";
+            }
+            if (itemCheckName != nullptr) {
+                itemId1 = dusk::mods::item_check(itemCheckName, itemId1, this);
+            }
+#endif
             fpc_ProcID itemId2 = fopAcM_createItemForPresentDemo(&current.pos, itemId1, 0, -1, -1,
-                                                                 0, 0);
+                0, 0 IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
             if (itemId2 != -1) {
                 dComIfGp_event_setItemPartnerId(itemId2);
             }

src/d/actor/d_a_npc_fairy.cpp

@@ -1333,7 +1333,9 @@ void daNpc_Fairy_c::PresentDemoCall() {
         item_no = 0;
     }
 
-    fpc_ProcID id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 0, -1, -1, NULL, NULL);
+    DUSK_ITEM_CHECK("fairy_reward:D_SB01", item_no, this);
+    fpc_ProcID id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 0, -1, -1, NULL,
+        NULL DUSK_GIVE_TAG("fairy_reward:D_SB01"));
     if (id != fpcM_ERROR_PROCESS_ID_e) {
         dComIfGp_event_setItemPartnerId(id);
     }

src/d/actor/d_a_npc_gra.cpp

@@ -4018,8 +4018,15 @@ BOOL daNpc_grA_c::talk(void*) {
         }
         if (r26 && talkProc(NULL, TRUE, NULL)) {
             if (mFlow.getEventId(&sp8) == 1) {
-                field_0x1480 =
-                    fopAcM_createItemForPresentDemo(&current.pos, sp8, 0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                const char* itemCheckName = nullptr;
+                if (sp8 == dItemNo_BOMB_IN_BAG_e) {
+                    itemCheckName = "goron_reward:F_SP113";
+                    sp8 = dusk::mods::item_check(itemCheckName, sp8, this);
+                }
+#endif
+                field_0x1480 = fopAcM_createItemForPresentDemo(&current.pos, sp8, 0, -1, -1, NULL,
+                    NULL IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
                 if (field_0x1480 != fpcM_ERROR_PROCESS_ID_e) {
                     s16 r25 = dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xff);
                     dComIfGp_getEvent()->reset(this);

src/d/actor/d_a_npc_gro.cpp

@@ -1681,7 +1681,9 @@ int daNpc_grO_c::talk(void* param_1) {
             if (facePlayerFlag && talkProc(NULL, TRUE, NULL)) {
                 if (mType == TYPE_MINES) {
                     if (mFlow.getEventId(&itemId) == 1) {
-                        mItemID = fopAcM_createItemForPresentDemo(&current.pos, itemId, 0, -1, -1, NULL, NULL);
+                        DUSK_ITEM_CHECK("key_shard_2:D_MN04", itemId, this);
+                        mItemID = fopAcM_createItemForPresentDemo(&current.pos, itemId, 0, -1, -1,
+                            NULL, NULL DUSK_GIVE_TAG("key_shard_2:D_MN04"));
                         if (mItemID != fpcM_ERROR_PROCESS_ID_e) {
                             s16 eventIdx = dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xFF);
                             dComIfGp_getEvent()->reset(this);

src/d/actor/d_a_npc_grr.cpp

@@ -1338,7 +1338,9 @@ int daNpc_grR_c::talk(void* param_1) {
             if (bVar1 && talkProc(NULL, TRUE, NULL)) {
                 if (mType == TYPE_0) {
                     if (mFlow.getEventId(&i_itemNo) == 1) {
-                        mItemID = fopAcM_createItemForPresentDemo(&current.pos, i_itemNo, 0, -1, -1, NULL, NULL);
+                        DUSK_ITEM_CHECK("key_shard_3:D_MN04", i_itemNo, this);
+                        mItemID = fopAcM_createItemForPresentDemo(&current.pos, i_itemNo, 0, -1, -1,
+                            NULL, NULL DUSK_GIVE_TAG("key_shard_3:D_MN04"));
 
                         if (mItemID != fpcM_ERROR_PROCESS_ID_e) {
                             s16 i_eventID = dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xFF);

src/d/actor/d_a_npc_grs.cpp

@@ -1190,8 +1190,9 @@ int daNpc_grS_c::talk(void* param_0) {
         if (unkFlag1 && talkProc(NULL, 1, NULL)) {
             if (mType == 0) {
                 if (mFlow.getEventId(&unkInt2) == 1) {
-                    mPresentItemId =
-                        fopAcM_createItemForPresentDemo(&current.pos, unkInt2, 0, -1, -1, 0, 0);
+                    DUSK_ITEM_CHECK("key_shard_1:D_MN04", unkInt2, this);
+                    mPresentItemId = fopAcM_createItemForPresentDemo(&current.pos, unkInt2, 0, -1,
+                        -1, 0, 0 DUSK_GIVE_TAG("key_shard_1:D_MN04"));
 
                     if (mPresentItemId != fpcM_ERROR_PROCESS_ID_e) {
                         s16 eventIdx =

src/d/actor/d_a_npc_impal.cpp

@@ -971,8 +971,9 @@ BOOL daNpcImpal_c::EvCut_ImpalAppear1(int i_cut_index) {
         if (talkProc(NULL, 1, NULL)) {
             int evt_id = 0;
             if (mFlow.getEventId(&evt_id) == 1) {
-                mItemPartnerId =
-                    fopAcM_createItemForPresentDemo(&current.pos, evt_id, 0, -1, -1, 0, 0);
+                DUSK_ITEM_CHECK("ilia_charm", evt_id, this);
+                mItemPartnerId = fopAcM_createItemForPresentDemo(
+                    &current.pos, evt_id, 0, -1, -1, 0, 0 DUSK_GIVE_TAG("ilia_charm"));
                 if (mItemPartnerId != 0xffffffff) {
                     s16 evt_idx =
                         dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xff);
@@ -1060,8 +1061,9 @@ BOOL daNpcImpal_c::EvCut_CopyRod(int i_cut_index) {
         case '0003':
             int evt_id = 0;
             if (mFlow.getEventId(&evt_id) == 1) {
-                mItemPartnerId =
-                    fopAcM_createItemForPresentDemo(&current.pos, evt_id, 0, -1, -1, 0, 0);
+                DUSK_ITEM_CHECK("skybook", evt_id, this);
+                mItemPartnerId = fopAcM_createItemForPresentDemo(
+                    &current.pos, evt_id, 0, -1, -1, 0, 0 DUSK_GIVE_TAG("skybook"));
                 dComIfGp_event_setItemPartnerId(mItemPartnerId);
                 mItemPartnerId = -1;
             }

src/d/actor/d_a_npc_ins.cpp

@@ -11,6 +11,10 @@
 #include "d/d_msg_object.h"
 #include <cstring>
 
+#if TARGET_PC
+static u8 s_givenInsectId = dItemNo_NONE_e;
+#endif
+
 enum Ins_RES_File_ID {
     /* BCK */
     /* 0x06 */ BCK_INS_F_HAPPY = 0x6,
@@ -1259,6 +1263,7 @@ int daNpcIns_c::waitPresent(void* param_1) {
                     daPy_py_c* player = daPy_getPlayerActorClass();
                     player->changeOriginalDemo();
                     player->changeDemoMode(0x25, 2, type, 0);
+                    IF_DUSK(s_givenInsectId = type;)
                 } else {
                     mInsectMsgNo = 0x719;
                 }
@@ -1487,7 +1492,17 @@ int daNpcIns_c::talk(void* param_1) {
                         OS_REPORT("会話終了時 イベントID=%d アイテムNo=%d\n", eventID, itemNo);
 
                         if (eventID == 1) {
-                            mItemID = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                            u32 itemGiveTag = 0;
+                            if (s_givenInsectId != dItemNo_NONE_e) {
+                                itemNo = dusk::mods::item_check_bug(
+                                    s_givenInsectId, itemNo & 0xFF, this);
+                                itemGiveTag = dusk::mods::item_give_tag_bug(s_givenInsectId);
+                                s_givenInsectId = dItemNo_NONE_e;
+                            }
+#endif
+                            mItemID = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1,
+                                -1, NULL, NULL IF_DUSK_ARG(itemGiveTag));
 
                             if (mItemID != fpcM_ERROR_PROCESS_ID_e) {
                                 daPy_getPlayerActorClass()->cancelOriginalDemo();

src/d/actor/d_a_npc_kkri.cpp

@@ -1181,7 +1181,16 @@ int daNpc_Kkri_c::talk(void*) {
                     switch (eventId) {
                     case 1:
                         if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                            mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, item_no, 0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                            const char* itemCheckName = nullptr;
+                            if (item_no == dItemNo_OIL_BOTTLE3_e) {
+                                itemCheckName = "coro_bottle";
+                                item_no = dusk::mods::item_check(itemCheckName, item_no, this);
+                            }
+#endif
+                            mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, item_no,
+                                0, -1, -1, NULL,
+                                NULL IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
                         }
 
                         if (fopAcM_IsExecuting(mItemPartnerId)) {

src/d/actor/d_a_npc_len.cpp

@@ -1236,8 +1236,9 @@ int daNpc_Len_c::talk(void* param_0) {
                     switch (evt_id) {
                     case 1:
                         if (mItemPartnerId == -1) {
+                            DUSK_ITEM_CHECK("renado_letter", local_18, this);
                             mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, local_18,
-                                                                             0, -1, -1, 0, 0);
+                                0, -1, -1, 0, 0 DUSK_GIVE_TAG("renado_letter"));
                         }
                         if (fopAcM_IsExecuting(mItemPartnerId)) {
                             mEvtNo = 1;

src/d/actor/d_a_npc_maro.cpp

@@ -2393,7 +2393,10 @@ int daNpc_Maro_c::cutArrowTutorial(int arg0) {
                     switch (evt_ret) {
                         case 1: {
                             if (mItemPartnerId == -1) {
-                                mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, evt_id, 0, -1, -1, NULL, NULL);
+                                DUSK_ITEM_CHECK("archery_reward:F_SP109", evt_id, this);
+                                mItemPartnerId =
+                                    fopAcM_createItemForPresentDemo(&current.pos, evt_id, 0, -1, -1,
+                                        NULL, NULL DUSK_GIVE_TAG("archery_reward:F_SP109"));
                             }
 
                             if (fopAcM_IsExecuting(mItemPartnerId)) {

src/d/actor/d_a_npc_myna2.cpp

@@ -1191,7 +1191,15 @@ int daNpc_myna2_c::ECut_gameGoalSuccess(int i_staffId) {
         case 20: {
             int itemNo = 0;
             if (mFlow.getEventId(&itemNo) == 1) {
-                mItemPid = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                const char* itemCheckName = nullptr;
+                if (itemNo == dItemNo_KAKERA_HEART_e) {
+                    itemCheckName = "plumm_minigame_reward";
+                    itemNo = dusk::mods::item_check(itemCheckName, itemNo, this);
+                }
+#endif
+                mItemPid = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL,
+                    NULL IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
             }
             break;
         }

src/d/actor/d_a_npc_pouya.cpp

@@ -958,8 +958,19 @@ int daNpc_Pouya_c::cutHaveFavorToAsk(int param_0) {
                 switch (evt_id) {
                 case 1:
                     if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
+#if TARGET_PC
+                        const char* itemCheckName = nullptr;
+                        if (local_64 == dItemNo_DROP_BOTTLE_e) {
+                            itemCheckName = "jovani_reward_1";
+                        } else if (local_64 == dItemNo_SILVER_RUPEE_e) {
+                            itemCheckName = "jovani_reward_2";
+                        }
+                        if (itemCheckName != nullptr) {
+                            local_64 = dusk::mods::item_check(itemCheckName, local_64, this);
+                        }
+#endif
                         mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, local_64, 0,
-                                                                         -1, -1, 0, 0);
+                            -1, -1, 0, 0 IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
                     }
                     if (fopAcM_IsExecuting(mItemPartnerId)) {
                         field_0xfce = 1;

src/d/actor/d_a_npc_prayer.cpp

@@ -720,7 +720,8 @@ fpc_ProcID daNpcPray_c::createHeart() {
     mDoMtx_stack_c::ZXYrotS(rot);
     mDoMtx_stack_c::multVec(&offset, &offset);
     pos += offset;
-    return fopAcM_createItemForBoss(&pos, dItemNo_KAKERA_HEART_e, fopAcM_GetRoomNo(this), &rot, &size, 0.0f, 0.0f, 0);
+    return fopAcM_createItemForBoss(&pos, dItemNo_KAKERA_HEART_e, fopAcM_GetRoomNo(this), &rot,
+        &size, 0.0f, 0.0f, 0 IF_DUSK_ARG("prayer_reward"));
 }
 
 BOOL daNpcPray_c::_Evt_GetHeart(int i_staffID) {

src/d/actor/d_a_npc_rafrel.cpp

@@ -1310,7 +1310,9 @@ bool daNpcRafrel_c::talk(void* param_0) {
                 OS_REPORT("会話終了時 イベントID=%d アイテムNo=%d\n", eventId, itemNo);
 
                 if (eventId == 1) {
-                    field_0xe00 = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+                    DUSK_ITEM_CHECK("auru_memo", itemNo, this);
+                    field_0xe00 = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1,
+                        NULL, NULL DUSK_GIVE_TAG("auru_memo"));
                     if (field_0xe00 != fpcM_ERROR_PROCESS_ID_e) {
                         s16 eventIdx = dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xFF);
                         dComIfGp_getEvent()->reset(this);
@@ -1562,7 +1564,9 @@ int daNpcRafrel_c::EvCut_Appear(int i_staffId) {
             int itemNo = 0;
             u16 eventId = mFlow.getEventId(&itemNo);
             if (eventId == 1) {
-                field_0xe00 = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+                DUSK_ITEM_CHECK("auru_memo", itemNo, this);
+                field_0xe00 = fopAcM_createItemForPresentDemo(
+                    &current.pos, itemNo, 0, -1, -1, NULL, NULL DUSK_GIVE_TAG("auru_memo"));
                 dComIfGp_event_setItemPartnerId(field_0xe00);
                 field_0xe00 = fpcM_ERROR_PROCESS_ID_e;
             }

src/d/actor/d_a_npc_the.cpp

@@ -823,8 +823,9 @@ BOOL daNpcThe_c::talk(void* param_0) {
                     }
                     int item_no = 0;
                     if (mFlow.getEventId(&item_no) == 1) {
+                        DUSK_ITEM_CHECK("telma_invoice", item_no, this);
                         mItemID = fopAcM_createItemForPresentDemo(&current.pos, item_no, 0, -1, -1,
-                                                                  NULL, NULL);
+                            NULL, NULL DUSK_GIVE_TAG("telma_invoice"));
                         if (mItemID != -1) {
                             s16 event_id = dComIfGp_getEventManager().getEventIdx(
                                 this, "DEFAULT_GETITEM", 0xff);

src/d/actor/d_a_npc_uri.cpp

@@ -1165,8 +1165,9 @@ int daNpc_Uri_c::cutEndCarryTutorial(int param_1) {
             (s32)mFlow.getEventId(&local_48) == 1)
         {
             if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                mItemPartnerId =
-                    fopAcM_createItemForPresentDemo(&current.pos, local_48, 0, -1, -1, NULL, NULL);
+                DUSK_ITEM_CHECK("uli_cradle_reward", local_48, this);
+                mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, local_48, 0, -1, -1,
+                    NULL, NULL DUSK_GIVE_TAG("uli_cradle_reward"));
             }
             if (fopAcM_IsExecuting(mItemPartnerId)) {
                 /* T_0007 - Ordon Village - During Uli's pick-up tutorial */

src/d/actor/d_a_npc_ykw.cpp

@@ -2213,8 +2213,9 @@ int daNpc_ykW_c::cutEndSnowboardRace(int param_0) {
             switch (eventId) {
             case 1:
                 if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                    mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemId, 0,
-                                                            -1, -1, 0, 0);
+                    DUSK_ITEM_CHECK("snowboard_race_reward", itemId, this);
+                    mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemId, 0, -1,
+                        -1, 0, 0 DUSK_GIVE_TAG("snowboard_race_reward"));
                 }
 
                 if (fopAcM_IsExecuting(mItemPartnerId)) {
@@ -2911,8 +2912,9 @@ int daNpc_ykW_c::talk(void* param_0) {
                     switch (eventId) {
                     case 1:
                         if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                            mItemPartnerId =
-                                fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, 0, 0);
+                            DUSK_ITEM_CHECK("dungeon_map:D_MN11", itemNo, this);
+                            mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemNo,
+                                0, -1, -1, 0, 0 DUSK_GIVE_TAG("dungeon_map:D_MN11"));
                         }
 
                         if (fopAcM_IsExecuting(mItemPartnerId)) {

src/d/actor/d_a_npc_zra.inc

@@ -2609,8 +2609,19 @@ BOOL daNpc_zrA_c::ECut_thanksBlast(int i_staffID) {
         case 31: {
             int item_id = 0;
             if (mFlow.getEventId(&item_id) == 1) {
-                mItemID = fopAcM_createItemForPresentDemo(&current.pos, item_id,
-                                                          0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                const char* itemCheckName = nullptr;
+                if (item_id == dItemNo_BOMB_IN_BAG_e) {
+                    itemCheckName = "iza_reward_1";
+                } else if (item_id == dItemNo_BOMB_BAG_LV2_e) {
+                    itemCheckName = "iza_reward_2";
+                }
+                if (itemCheckName != nullptr) {
+                    item_id = dusk::mods::item_check(itemCheckName, item_id, this);
+                }
+#endif
+                mItemID = fopAcM_createItemForPresentDemo(&current.pos, item_id, 0, -1, -1, NULL,
+                    NULL IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
             }
             field_0x9eb = true;
             break;

src/d/actor/d_a_npc_zrc.cpp

@@ -1681,8 +1681,9 @@ BOOL daNpc_zrC_c::ECut_earringGet(int i_staffID) {
         case 40: {
             int item_no = 0;
             if (mFlow.getEventId(&item_no) == 1) {
-                mItemID = fopAcM_createItemForPresentDemo(&current.pos, item_no,
-                                                          0, -1, -1, NULL, NULL);
+                DUSK_ITEM_CHECK("coral_earring", item_no, this);
+                mItemID = fopAcM_createItemForPresentDemo(
+                    &current.pos, item_no, 0, -1, -1, NULL, NULL DUSK_GIVE_TAG("coral_earring"));
             }
             break;
         }

src/d/actor/d_a_npc_zrz.cpp

@@ -1729,8 +1729,9 @@ BOOL daNpc_zrZ_c::ECut_clothesGet(int i_staffID) {
             }
             item_no = 0;
             if (mFlow.getEventId(&item_no) == 1) {
-                mItemID = fopAcM_createItemForPresentDemo(&current.pos, item_no,
-                                                          0, -1, -1, NULL, NULL);
+                DUSK_ITEM_CHECK("zora_armor", item_no, this);
+                mItemID = fopAcM_createItemForPresentDemo(
+                    &current.pos, item_no, 0, -1, -1, NULL, NULL DUSK_GIVE_TAG("zora_armor"));
             }
             break;
 

src/d/actor/d_a_obj_item.cpp

@@ -206,7 +206,7 @@ void daItem_c::CreateInit() {
     initBaseMtx();
     animPlay(1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f);
 
-    if (m_itemNo == dItemNo_BOOMERANG_e) {
+    if (m_itemNo == dItemNo_BOOMERANG_e IF_DUSK(&&!mItemOverridden)) {
         itemGetNextExecute();
     } else if ((m_itemNo == dItemNo_ORANGE_RUPEE_e || m_itemNo == dItemNo_SILVER_RUPEE_e) &&
                mSparkleEmtr.getEmitter() == NULL)
@@ -264,6 +264,17 @@ int daItem_c::_daItem_create() {
         shape_angle.z = 0;
         shape_angle.x = 0;
 
+#if TARGET_PC
+        const u32 params = fopAcM_GetParam(this);
+        mOriginalItemNo = params & 0xFF;
+        const u8 resolvedItem = dusk::mods::item_check_freestanding(
+            daItem_prm::getItemBitNo(this), mOriginalItemNo, this);
+        mItemOverridden = resolvedItem != mOriginalItemNo;
+        mItemGiveTag = dusk::mods::item_give_tag_freestanding(daItem_prm::getItemBitNo(this));
+        if (mItemOverridden) {
+            fopAcM_SetParam(this, (params & 0xFFFFFF00) | resolvedItem);
+        }
+#endif
         field_0x95d = true;
     }
 
@@ -507,9 +518,18 @@ void daItem_c::procInitGetDemoEvent() {
     fopAcM_orderItemEvent(this, 0, 0);
     eventInfo.onCondition(dEvtCnd_CANGETITEM_e);
 
-    m_item_id = fopAcM_createItemForTrBoxDemo(&current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this),
-                                              NULL, NULL);
+#if TARGET_PC
+    const u8 displayItemNo = m_itemNo;
+    if (mItemOverridden) {
+        m_itemNo = dusk::mods::item_check_tagged(mItemGiveTag, mOriginalItemNo, this);
+    }
+#endif
+    m_item_id = fopAcM_createItemForTrBoxDemo(
+        &current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this), NULL, NULL IF_DUSK_ARG(mItemGiveTag));
     JUT_ASSERT(0, m_item_id != fpcM_ERROR_PROCESS_ID_e);
+#if TARGET_PC
+    m_itemNo = displayItemNo;
+#endif
 
     setStatus(STATUS_WAIT_GET_DEMO_EVENT_e);
 }
@@ -521,7 +541,7 @@ void daItem_c::procWaitGetDemoEvent() {
             dComIfGp_event_setItemPartnerId(m_item_id);
         }
     } else {
-        if (m_itemNo == dItemNo_BOOMERANG_e) {
+        if (m_itemNo == dItemNo_BOOMERANG_e IF_DUSK(&&!mItemOverridden)) {
             fopAcM_orderItemEvent(this, 0, 0);
             eventInfo.onCondition(dEvtCnd_CANGETITEM_e);
             return;
@@ -537,7 +557,9 @@ void daItem_c::procWaitGetDemoEvent() {
 
             procInitSimpleGetDemo();
             itemGet();
-            if (!haveItem) {
+            if (!haveItem IF_DUSK(&&(!mItemOverridden || (m_itemNo >= dItemNo_GREEN_RUPEE_e &&
+                                                             m_itemNo <= dItemNo_SILVER_RUPEE_e))))
+            {
                 dComIfGs_offItemFirstBit(m_itemNo);
             }
         } else {
@@ -864,6 +886,12 @@ void daItem_c::itemGetNextExecute() {
             procInitGetDemoEvent();
             break;
         default:
+#if TARGET_PC
+            if (mItemOverridden) {
+                procInitGetDemoEvent();
+                break;
+            }
+#endif
             // "[daItem_c] Get process not defined[%d]\n"
             OS_REPORT_ERROR("[daItem_c]ゲット処理が定義されていません[%d]\n", m_itemNo);
         }
@@ -877,38 +905,48 @@ void daItem_c::itemGetNextExecute() {
 }
 
 void daItem_c::itemGet() {
+#if TARGET_PC
+    const u8 displayItemNo = m_itemNo;
+    if (mItemOverridden) {
+        m_itemNo = dusk::mods::item_check_tagged(mItemGiveTag, mOriginalItemNo, this);
+    }
+#endif
     switch (m_itemNo) {
+#if TARGET_PC
+    case dItemNo_UTAWA_HEART_e:
+    case dItemNo_KAKERA_HEART_e:
+#endif
     case dItemNo_HEART_e:
         mDoAud_seStart(Z2SE_HEART_PIECE_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_GREEN_RUPEE_e:
         mDoAud_seStart(Z2SE_GREEN_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_BLUE_RUPEE_e:
         mDoAud_seStart(Z2SE_BLUE_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_YELLOW_RUPEE_e:
         mDoAud_seStart(Z2SE_BLUE_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_RED_RUPEE_e:
         mDoAud_seStart(Z2SE_RED_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_PURPLE_RUPEE_e:
         mDoAud_seStart(Z2SE_RED_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_ORANGE_RUPEE_e:
         mDoAud_seStart(Z2SE_RED_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_SILVER_RUPEE_e:
         mDoAud_seStart(Z2SE_RED_LUPY_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
         break;
     case dItemNo_BOOMERANG_e:
         break;
@@ -918,12 +956,25 @@ void daItem_c::itemGet() {
     case dItemNo_ARROW_1_e:
     case dItemNo_PACHINKO_SHOT_e:
         mDoAud_seStart(Z2SE_CONSUMP_ITEM_GET, NULL, 0, 0);
-        execItemGet(m_itemNo);
+        execItemGet(m_itemNo IF_DUSK_ARG(mItemGiveTag) IF_DUSK_ARG(this));
+#if TARGET_PC
+        break;
+#endif
     default:
+#if TARGET_PC
+        if (mItemOverridden) {
+            mDoAud_seStart(Z2SE_CONSUMP_ITEM_GET, NULL, 0, 0);
+            execItemGet(m_itemNo, mItemGiveTag, this);
+            break;
+        }
+#endif
         // "[daItem_c] Get process not defined[%d]\n"
         OS_REPORT_ERROR("[daItem_c]ゲット処理が定義されていません[%d]\n", m_itemNo);
         break;
     }
+#if TARGET_PC
+    m_itemNo = displayItemNo;
+#endif
 }
 
 BOOL daItem_c::checkCountTimer() {

src/d/actor/d_a_obj_life_container.cpp

@@ -97,6 +97,12 @@ int daObjLife_c::Create() {
     field_0x94c = 0.7f;
     mRotateSpeed = 7000;
 
+#if TARGET_PC
+    if (mOverrideHover) {
+        fopAcM_SetGravity(this, 0.0f);
+        mRotateSpeed = 550;
+    }
+#endif
     setEffect();
     mSound.init(&current.pos, 1);
     return 1;
@@ -140,6 +146,27 @@ int daObjLife_c::create() {
         home.angle.x = home.angle.z = 0;
         current.angle.x = current.angle.z = 0;
         shape_angle.x = shape_angle.z = 0;
+#if TARGET_PC
+        const u32 params = fopAcM_GetParam(this);
+        const u8 parameterItemNo = params & 0xFF;
+        if (mItemGiveOriginalNo == dItemNo_NONE_e) {
+            mOriginalItemNo = parameterItemNo;
+            const u8 resolvedItem =
+                dusk::mods::item_check_freestanding(getSaveBitNo(), mOriginalItemNo, this);
+            mItemGiveTag = dusk::mods::item_give_tag_freestanding(getSaveBitNo());
+            mItemOverridden = resolvedItem != mOriginalItemNo;
+            if (mItemOverridden) {
+                fopAcM_SetParam(this, (params & 0xFFFFFF00) | resolvedItem);
+            }
+        } else {
+            mOriginalItemNo = mItemGiveOriginalNo;
+            mItemOverridden = parameterItemNo != mItemGiveOriginalNo;
+        }
+        mOverrideHover =
+            mItemOverridden &&
+            (mOriginalItemNo == dItemNo_UTAWA_HEART_e ||
+                (mOriginalItemNo >= dItemNo_M_BEETLE_e && mOriginalItemNo <= dItemNo_F_MAYFLY_e));
+#endif
         mIsPrmsInit = true;
     }
 
@@ -153,7 +180,7 @@ int daObjLife_c::create() {
         return cPhs_ERROR_e;
     }
 
-    if (m_itemNo == dItemNo_UTAWA_HEART_e && dComIfGs_isStageLife()) {
+    if (m_itemNo == dItemNo_UTAWA_HEART_e && dComIfGs_isStageLife() IF_DUSK(&&!mItemOverridden)) {
         return cPhs_ERROR_e;
     }
 
@@ -296,8 +323,18 @@ int daObjLife_c::initActionOrderGetDemo() {
     fopAcM_orderItemEvent(this, 0, 0);
     eventInfo.onCondition(dEvtCnd_CANGETITEM_e);
 
-    mItemId = fopAcM_createItemForTrBoxDemo(&current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this), NULL, NULL);
+#if TARGET_PC
+    const u8 displayItemNo = m_itemNo;
+    if (mItemOverridden) {
+        m_itemNo = dusk::mods::item_check_tagged(mItemGiveTag, mOriginalItemNo, this);
+    }
+#endif
+    mItemId = fopAcM_createItemForTrBoxDemo(
+        &current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this), NULL, NULL IF_DUSK_ARG(mItemGiveTag));
     JUT_ASSERT(699, mItemId != fpcM_ERROR_PROCESS_ID_e);
+#if TARGET_PC
+    m_itemNo = displayItemNo;
+#endif
 
     setStatus(STATUS_ORDER_GET_DEMO_e);
     return 1;

src/d/actor/d_a_obj_shield.cpp

@@ -109,6 +109,7 @@ int daItemShield_c::__CreateHeap() {
 int daItemShield_c::create() {
     fopAcM_ct(this, daItemShield_c);
     m_itemNo = dItemNo_WOOD_SHIELD_e;
+    DUSK_ITEM_CHECK("ordon_shield", m_itemNo, this);
     if (fopAcM_isSwitch(this, getSwBit2())) {
         OS_REPORT("木の盾：もう取ったので出ません\n");
         return cPhs_ERROR_e;
@@ -240,8 +241,9 @@ int daItemShield_c::initActionOrderGetDemo() {
     daItemBase_c::hide();
     fopAcM_orderItemEvent(this, 0, 0);
     eventInfo.onCondition(dEvtCnd_CANGETITEM_e);
-    mItemId =
-        fopAcM_createItemForTrBoxDemo(&current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this), 0, 0);
+    mItemId = fopAcM_createItemForTrBoxDemo(&current.pos,
+        DUSK_ITEM_CHECK_EXPR("ordon_shield", dItemNo_WOOD_SHIELD_e, this), -1,
+        fopAcM_GetRoomNo(this), 0, 0 DUSK_GIVE_TAG("ordon_shield"));
     JUT_ASSERT(682, mItemId != fpcM_ERROR_PROCESS_ID_e)
     setStatus(STATUS_ORDERGETDEMO);
     return 1;

src/d/actor/d_a_obj_sword.cpp

@@ -37,6 +37,7 @@ int daObjSword_c::Create() {
 cPhs_Step daObjSword_c::create() {
     fopAcM_ct(this, daObjSword_c);
     m_itemNo = 0x28;
+    DUSK_ITEM_CHECK("ordon_sword", m_itemNo, this);
     if (fopAcM_isItem(this, getItemBit())) {
         return cPhs_ERROR_e;
     }
@@ -71,8 +72,9 @@ int daObjSword_c::initActionOrderGetDemo() {
     hide();
     fopAcM_orderItemEvent(this, 0, 0);
     eventInfo.onCondition(8);
-    mProcID = fopAcM_createItemForTrBoxDemo(&current.pos, m_itemNo, -1, fopAcM_GetRoomNo(this),
-                                            NULL, NULL);
+    mProcID =
+        fopAcM_createItemForTrBoxDemo(&current.pos, DUSK_ITEM_CHECK_EXPR("ordon_sword", 0x28, this),
+            -1, fopAcM_GetRoomNo(this), NULL, NULL DUSK_GIVE_TAG("ordon_sword"));
     setStatus(1);
     return 1;
 }

src/d/actor/d_a_obj_wood_statue.cpp

@@ -255,8 +255,9 @@ int daObjWStatue_c::initActionOrderGetDemo() {
     s16 eventIdx = dComIfGp_getEventManager().getEventIdx(this, "DEFAULT_GETITEM", 0xff);
     dComIfGp_getEvent()->reset(this);
     fopAcM_orderChangeEventId(this, eventIdx, 1, 0xffff);
-    mItemId = fopAcM_createItemForTrBoxDemo(&current.pos, m_itemNo, 0xffffffff,
-                                            fopAcM_GetRoomNo(this), 0, 0);
+    mItemId = fopAcM_createItemForTrBoxDemo(&current.pos,
+        DUSK_ITEM_CHECK_EXPR("wood_statue", m_itemNo, this), 0xffffffff, fopAcM_GetRoomNo(this),
+        0, 0 DUSK_GIVE_TAG("wood_statue"));
     JUT_ASSERT(544, mItemId != fpcM_ERROR_PROCESS_ID_e);
     setStatus(STATUS_ORDER_GET_DEMO);
     return 1;

src/d/actor/d_a_obj_zcloth.cpp

@@ -32,6 +32,7 @@ int daObjZCloth_c::Create() {
 int daObjZCloth_c::create() {
     fopAcM_ct(this, daObjZCloth_c);
     m_itemNo = 0x31;
+    DUSK_ITEM_CHECK("zora_armor", m_itemNo, this);
     int phase = dComIfG_resLoad(&mPhase, dItem_data::getFieldArc(m_itemNo));
     if (phase == cPhs_COMPLEATE_e) {
         if (!fopAcM_entrySolidHeap(this, (heapCallbackFunc)CheckFieldItemCreateHeap, 0x2fb0)) {

src/d/actor/d_a_shop_item.cpp

@@ -11,6 +11,20 @@
 #include "m_Do/m_Do_lib.h"
 #include <cstring>
 
+#if TARGET_PC
+#include "d/d_item_data.h"
+
+const ResourceData& daShopItem_c::getResourceData() const {
+    if (mItemOverridden) {
+        return mOverrideData;
+    }
+    return mData[mShopItemID];
+}
+#define SHOP_RESOURCE_DATA getResourceData()
+#else
+#define SHOP_RESOURCE_DATA mData[mShopItemID]
+#endif
+
 const char* daShopItem_c::getShopArcname() {
     switch (m_itemNo) {
     case dItemNo_NONE_e:
@@ -88,7 +102,29 @@ const char* daShopItem_c::getShopArcname() {
         return NULL;
     }
 
-    return mData[mShopItemID].get_arcName();
+#if TARGET_PC
+    if (m_itemNo != dItemNo_NONE_e && mItemGiveOriginalNo == dItemNo_NONE_e) {
+        mItemGiveOriginalNo = m_itemNo;
+        const u8 resolvedItem = dusk::mods::item_check_shop(mItemGiveOriginalNo, this);
+        mItemOverridden = resolvedItem != mItemGiveOriginalNo;
+        if (mItemOverridden) {
+            mOverrideData = mData[mShopItemID];
+            mOverrideData.mArcName = dItem_data::getArcName(resolvedItem);
+            mOverrideData.mBmdName = dItem_data::getBmdName(resolvedItem);
+            mOverrideData.mBtkName = dItem_data::getBtkName(resolvedItem);
+            mOverrideData.mBckName = dItem_data::getBckName(resolvedItem);
+            mOverrideData.mBrkName = dItem_data::getBrkName(resolvedItem);
+            mOverrideData.mBtpName = dItem_data::getBtpName(resolvedItem);
+            mOverrideData.mTevFrm = dItem_data::getTevFrm(resolvedItem);
+            mOverrideData.mBtpFrm = -1;
+            mOverrideData.mFlag = static_cast<u32>(-1);
+            mOverrideData.mOffsetY = mShopItemID == SHOP_ITEMNO_ARMOR ? 60.0f : 15.0f;
+            mOverrideData.mScale = 1.0f;
+        }
+    }
+#endif
+
+    return SHOP_RESOURCE_DATA.get_arcName();
 }
 
 DUSK_GAME_DATA const f32 daShopItem_c::m_cullfar_max = 5000.0f;
@@ -104,6 +140,11 @@ u16 daShopItem_c::getHeapSize() {
     OS_REPORT("ShopItemID [%u]\n", a_ShopItemID);
     ASSERT(a_ShopItemID < SHOP_ITEMNO_MAX);
 
+#if TARGET_PC
+    if (mItemOverridden) {
+        return 0x8000;
+    }
+#endif
     return HeapSizeTbl[a_ShopItemID];
 }
 
@@ -119,11 +160,11 @@ void daShopItem_c::CreateInit() {
 
     if (strcmp("R_SP109", dComIfGp_getStartStageName()) == 0 && dComIfGp_getStartStageRoomNo() == 1)
     {
-        scale.set(mData[mShopItemID].get_scale() * 0.8f, mData[mShopItemID].get_scale() * 0.8f,
-                  mData[mShopItemID].get_scale() * 0.8f);
+        scale.set(SHOP_RESOURCE_DATA.get_scale() * 0.8f, SHOP_RESOURCE_DATA.get_scale() * 0.8f,
+            SHOP_RESOURCE_DATA.get_scale() * 0.8f);
     } else {
-        scale.set(mData[mShopItemID].get_scale(), mData[mShopItemID].get_scale(),
-                  mData[mShopItemID].get_scale());
+        scale.set(SHOP_RESOURCE_DATA.get_scale(), SHOP_RESOURCE_DATA.get_scale(),
+            SHOP_RESOURCE_DATA.get_scale());
     }
 
     home.pos = current.pos;
@@ -137,8 +178,8 @@ void daShopItem_c::set_mtx() {
     if (daShopItem_prm::getGroup(this) == 15) {
         mDoMtx_stack_c::transS(current.pos.x, current.pos.y, current.pos.z);
     } else {
-        mDoMtx_stack_c::transS(current.pos.x, current.pos.y + mData[mShopItemID].get_offsetY(),
-                               current.pos.z);
+        mDoMtx_stack_c::transS(
+            current.pos.x, current.pos.y + SHOP_RESOURCE_DATA.get_offsetY(), current.pos.z);
     }
 
     MTXCopy(mDoMtx_stack_c::get(), mMtx);
@@ -147,8 +188,8 @@ void daShopItem_c::set_mtx() {
     if (daShopItem_prm::getGroup(this) == 15) {
         mDoMtx_stack_c::ZXYrotM(-11300, 32700, 7300);
     } else {
-        mDoMtx_stack_c::ZXYrotM(mAngleX + mData[mShopItemID].get_angleX(),
-                                mData[mShopItemID].get_angleY(), mData[mShopItemID].get_angleZ());
+        mDoMtx_stack_c::ZXYrotM(mAngleX + SHOP_RESOURCE_DATA.get_angleX(),
+            SHOP_RESOURCE_DATA.get_angleY(), SHOP_RESOURCE_DATA.get_angleZ());
     }
 
     mDoMtx_stack_c::ZXYrotM(current.angle.x, current.angle.y, current.angle.z);
@@ -156,7 +197,7 @@ void daShopItem_c::set_mtx() {
     if (daShopItem_prm::getGroup(this) == 15) {
         mDoMtx_stack_c::XrotM(0);
     } else {
-        mDoMtx_stack_c::XrotM(mData[mShopItemID].get_angleOffsetX());
+        mDoMtx_stack_c::XrotM(SHOP_RESOURCE_DATA.get_angleOffsetX());
     }
 
     mpModel->setBaseTRMtx(mDoMtx_stack_c::get());
@@ -190,29 +231,31 @@ void daShopItem_c::setShadow() {
 }
 
 BOOL daShopItem_c::chkFlag(int i_flag) {
-    return mData[mShopItemID].get_flag() & i_flag;
+    return SHOP_RESOURCE_DATA.get_flag() & i_flag;
 }
 
 s8 daShopItem_c::getTevFrm() {
-    return mData[mShopItemID].get_tevfrm();
+    return SHOP_RESOURCE_DATA.get_tevfrm();
 }
 
 s8 daShopItem_c::getBtpFrm() {
-    return mData[mShopItemID].get_btpfrm();
+    return SHOP_RESOURCE_DATA.get_btpfrm();
 }
 
 u8 daShopItem_c::getShadowSize() {
-    return mData[mShopItemID].get_shadowSize();
+    return SHOP_RESOURCE_DATA.get_shadowSize();
 }
 
 u8 daShopItem_c::getCollisionH() {
-    return mData[mShopItemID].get_collisionH();
+    return SHOP_RESOURCE_DATA.get_collisionH();
 }
 
 u8 daShopItem_c::getCollisionR() {
-    return mData[mShopItemID].get_collisionR();
+    return SHOP_RESOURCE_DATA.get_collisionR();
 }
 
+#undef SHOP_RESOURCE_DATA
+
 int daShopItem_c::_create() {
     fopAcM_ct(this, daShopItem_c);
 

src/d/actor/d_a_tag_statue_evt.cpp

@@ -362,9 +362,11 @@ int daTagStatue_c::demoProc() {
                     item = dItemNo_AIR_LETTER_e;
                 }
 
-                mItemId =
-                    fopAcM_createItemForTrBoxDemo(&current.pos, item, -1,
-                                                  fopAcM_GetRoomNo(this), 0, 0);
+#if TARGET_PC
+                item = dusk::mods::item_check_sky_character(item & 0xFF, this);
+#endif
+                mItemId = fopAcM_createItemForTrBoxDemo(&current.pos, item, -1,
+                    fopAcM_GetRoomNo(this), 0, 0 IF_DUSK_ARG(dusk::mods::item_give_tag_sky_character()));
 
                 JUT_ASSERT(580, mItemId != fpcM_ERROR_PROCESS_ID_e);
 

src/d/actor/d_a_tbox.cpp

@@ -1390,6 +1390,10 @@ u8 daTbox_c::getBombItemNoMain(u8 i_itemNo) {
 
 int daTbox_c::setGetDemoItem() {
     u8 item_no = getItemNo();
+#if TARGET_PC
+    const u32 giveTag = dusk::mods::item_give_tag_chest(getTboxNo());
+    item_no = dusk::mods::item_check_tagged(giveTag, mOriginalItemNo, this);
+#endif
     if (item_no == dItemNo_BOMB_5_e || item_no == dItemNo_BOMB_10_e || item_no == dItemNo_BOMB_20_e || item_no == dItemNo_BOMB_30_e ||
         item_no == dItemNo_WATER_BOMB_5_e || item_no == dItemNo_WATER_BOMB_10_e || item_no == dItemNo_WATER_BOMB_20_e || item_no == dItemNo_WATER_BOMB_30_e ||
         item_no == dItemNo_BOMB_INSECT_5_e || item_no == dItemNo_BOMB_INSECT_10_e || item_no == dItemNo_BOMB_INSECT_20_e || item_no == dItemNo_BOMB_INSECT_30_e)
@@ -1399,9 +1403,11 @@ int daTbox_c::setGetDemoItem() {
 
     fpc_ProcID item_id;
     if (field_0x718) {
-        item_id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 1, -1, -1, NULL, NULL);
+        item_id = fopAcM_createItemForPresentDemo(
+            &current.pos, item_no, 1, -1, -1, NULL, NULL IF_DUSK_ARG(giveTag));
     } else {
-        item_id = fopAcM_createItemForTrBoxDemo(&current.pos, item_no, -1, -1, NULL, NULL);
+        item_id = fopAcM_createItemForTrBoxDemo(
+            &current.pos, item_no, -1, -1, NULL, NULL IF_DUSK_ARG(giveTag));
     }
 
     if (item_id != fpcM_ERROR_PROCESS_ID_e) {
@@ -1785,6 +1791,11 @@ void daTbox_c::mode_exec() {
 cPhs_Step daTbox_c::create1st() {
     if (!mParamsInit) {
         field_0x980 = home.angle.x;
+#if TARGET_PC
+        mOriginalItemNo = (home.angle.z >> 8) & 0xFF;
+        const u8 resolvedItem = dusk::mods::item_check_chest(getTboxNo(), mOriginalItemNo, this);
+        home.angle.z = static_cast<s16>((home.angle.z & ~0xFF00) | (resolvedItem << 8));
+#endif
         field_0x982 = home.angle.z;
         home.angle.z = 0;
         home.angle.x = 0;

src/d/actor/d_a_tbox2.cpp

@@ -138,6 +138,14 @@ int daTbox2_c::create1st() {
     fopAcM_ct(this, daTbox2_c);
     mModelType = getModelType();
 
+#if TARGET_PC
+    mOriginalItemNo = getItemNo();
+    int tboxNo = fopAcM_GetParamBit(this, 16, 8);
+    const u8 resolvedItem = dusk::mods::item_check_chest(tboxNo, mOriginalItemNo, this);
+    u32 params = (fopAcM_GetParam(this) & 0xFFFFFF00) | resolvedItem;
+    fopAcM_SetParam(this, params);
+#endif
+
     int phase_state = dComIfG_resLoad(&mPhase, l_arcName);
     if (phase_state == cPhs_COMPLEATE_e) {
         u32 heap_size;
@@ -370,12 +378,17 @@ void daTbox2_c::actionOpenWait() {
 
 int daTbox2_c::setGetDemoItem() {
     u8 item_no = getItemNo();
+#if TARGET_PC
+    int tboxNo = fopAcM_GetParamBit(this, 16, 8);
+    const u32 giveTag = dusk::mods::item_give_tag_chest(tboxNo);
+    item_no = dusk::mods::item_check_tagged(giveTag, mOriginalItemNo, this);
+#endif
 
     u32 partner_id;
     if (mReturnRupee) {
-        partner_id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 1, -1, -1, NULL, NULL);
+        partner_id = fopAcM_createItemForPresentDemo(&current.pos, item_no, 1, -1, -1, NULL, NULL IF_DUSK_ARG(giveTag));
     } else {
-        partner_id = fopAcM_createItemForTrBoxDemo(&current.pos, item_no, -1, -1, NULL, NULL);
+        partner_id = fopAcM_createItemForTrBoxDemo(&current.pos, item_no, -1, -1, NULL, NULL IF_DUSK_ARG(giveTag));
     }
 
     if (partner_id != -1) {

src/d/d_a_shop_item_static.cpp

@@ -45,6 +45,12 @@ int CheckShopItemCreateHeap(fopAc_ac_c* i_this) {
     daShopItem_c* a_this1 = static_cast<daShopItem_c*>(i_this);
     daShopItem_c* a_this2 = static_cast<daShopItem_c*>(i_this);
 
+#if TARGET_PC
+    const ResourceData& data = a_this2->getResourceData();
+    return a_this1->CreateItemHeap(data.get_arcName(), data.get_bmdName(), data.get_btk1Name(),
+        data.get_bpk1Name(), data.get_bck1Name(), data.get_bxa1Name(), data.get_brk1Name(),
+        data.get_btp1Name());
+#else
     u8 a_ShopItemID = a_this2->getShopItemID();
     return a_this1->CreateItemHeap(daShopItem_c::mData[a_ShopItemID].get_arcName(),
                                   daShopItem_c::mData[a_ShopItemID].get_bmdName(),
@@ -54,4 +60,5 @@ int CheckShopItemCreateHeap(fopAc_ac_c* i_this) {
                                   daShopItem_c::mData[a_ShopItemID].get_bxa1Name(),
                                   daShopItem_c::mData[a_ShopItemID].get_brk1Name(),
                                   daShopItem_c::mData[a_ShopItemID].get_btp1Name());
+#endif
 }

src/d/d_event_manager.cpp

@@ -335,6 +335,14 @@ bool dEvent_manager_c::setObjectArchive(DUSK_CONST char* arcname) {
 
     if (arcname != NULL) {
         rt = dComIfG_getObjectRes(arcname, DataFileName);
+#if TARGET_PC
+        if (rt != nullptr && strcmp(arcname, "Prayer") == 0) {
+            // pointer to Prayer event `011get_item` prm0 in it's event_list.dat
+            u8* itemNo = static_cast<u8*>(rt) + 0x927;
+            *itemNo =
+                dusk::mods::item_check("prayer_reward", dItemNo_KAKERA_HEART_e, NULL);
+        }
+#endif
         int base_status = mEventList[BASE_ACTOR].init((char*)rt, -1);
 
         #if DEBUG

src/d/d_item.cpp

@@ -274,8 +274,9 @@ inline void getItemFunc(u8 i_itemNo) {
     item_func_ptr[i_itemNo]();
 }
 
-void execItemGet(u8 i_itemNo) {
+void execItemGet(u8 i_itemNo IF_DUSK_ARG(u32 i_itemGiveTag) IF_DUSK_ARG(fopAc_ac_c* i_giver)) {
     getItemFunc(i_itemNo);
+    IF_DUSK(dusk::mods::item_granted(i_itemNo, i_itemGiveTag, i_giver);)
 }
 
 static int (*item_getcheck_func_ptr[256])() = {

src/d/d_shop_system.cpp

@@ -905,8 +905,16 @@ int dShopSystem_c::seq_start(fopAc_ac_c* actor, dMsgFlow_c* i_flow) {
                 int itemNo;
                 if (mFlow.getEventId(&itemNo) == 1) {
                     if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                        mItemPartnerId = fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1,
-                                                                      -1, NULL, NULL);
+#if TARGET_PC
+                        const char* itemCheckName = nullptr;
+                        if (itemNo == dItemNo_HALF_MILK_BOTTLE_e) {
+                            itemCheckName = "sera_reward";
+                            itemNo = dusk::mods::item_check(itemCheckName, itemNo, actor);
+                        }
+#endif
+                        mItemPartnerId =
+                            fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL,
+                                NULL IF_DUSK_ARG(dusk::mods::item_give_tag(itemCheckName)));
                     }
 
                     if (fpcEx_IsExist(mItemPartnerId)) {
@@ -1195,8 +1203,12 @@ int dShopSystem_c::seq_decide_yes(fopAc_ac_c* actor, dMsgFlow_c* i_flow) {
     if (mFlow.getEventId(&itemNo) == 1) {
         if (i_flow->doFlow(actor, NULL, 0)) {
             if (mItemPartnerId == fpcM_ERROR_PROCESS_ID_e) {
-                mItemPartnerId =
-                    fopAcM_createItemForPresentDemo(&current.pos, itemNo, 0, -1, -1, NULL, NULL);
+#if TARGET_PC
+                const u32 itemGiveTag = dusk::mods::item_give_tag_shop(itemNo & 0xFF);
+                itemNo = dusk::mods::item_check_shop(itemNo & 0xFF, actor);
+#endif
+                mItemPartnerId = fopAcM_createItemForPresentDemo(
+                    &current.pos, itemNo, 0, -1, -1, NULL, NULL IF_DUSK_ARG(itemGiveTag));
             }
 
             if (fpcEx_IsExist(mItemPartnerId)) {

src/dusk/mods/item.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <cstdint>
+
+class fopAc_ac_c;
+
+namespace dusk::mods {
+
+uint8_t item_check(const char* name, uint8_t itemNo, fopAc_ac_c* giver);
+uint8_t item_check_tagged(uint32_t giveTag, uint8_t itemNo, fopAc_ac_c* giver);
+
+uint8_t item_check_chest(uint8_t boxNo, uint8_t itemNo, fopAc_ac_c* chest);
+uint8_t item_check_boss(uint8_t itemNo, fopAc_ac_c* boss);
+uint8_t item_check_freestanding(uint8_t bitNo, uint8_t itemNo, fopAc_ac_c* item);
+uint8_t item_check_poe(uint8_t bitNo, uint8_t itemNo, fopAc_ac_c* poe);
+uint8_t item_check_shop(uint8_t itemNo, fopAc_ac_c* giver);
+uint8_t item_check_bug(uint8_t insectId, uint8_t itemNo, fopAc_ac_c* agitha);
+uint8_t item_check_sky_character(uint8_t itemNo, fopAc_ac_c* statue);
+
+uint32_t item_give_tag(const char* name);
+uint32_t item_give_tag_chest(uint8_t boxNo);
+uint32_t item_give_tag_boss();
+uint32_t item_give_tag_freestanding(uint8_t bitNo);
+uint32_t item_give_tag_poe(uint8_t bitNo);
+uint32_t item_give_tag_shop(uint8_t itemNo);
+uint32_t item_give_tag_bug(uint8_t insectId);
+uint32_t item_give_tag_sky_character();
+
+void item_check_enqueue(const char* name, uint8_t itemNo);
+void item_check_enqueue_poe(uint8_t bitNo, uint8_t itemNo);
+
+void item_granted(uint8_t itemNo, uint32_t giveTag, fopAc_ac_c* giver);
+
+bool item_give_queue_dispatching();
+uint32_t item_give_queue_take_tag();
+
+}  // namespace dusk::mods

src/dusk/mods/item_checks.cpp

@@ -0,0 +1,294 @@
+#include "item.hpp"
+
+#include "dusk/mod_loader.hpp"
+#include "dusk/mods/loader/loader.hpp"
+#include "dusk/mods/svc/item.hpp"
+
+#include "aurora/lib/logging.hpp"
+#include "d/d_com_inf_game.h"
+
+#include <fmt/format.h>
+
+#include <exception>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+namespace dusk::mods {
+namespace {
+
+aurora::Module Log{"dusk::mods::item_checks"};
+
+struct CheckOverride {
+    std::string name;
+    uint8_t itemNo = 0;
+};
+
+struct CheckResolver {
+    ItemCheckHandle handle = 0;
+    std::string name;
+    ItemCheckResolveFn fn = nullptr;
+    void* userData = nullptr;
+};
+
+struct ModItemChecks {
+    std::vector<CheckOverride> overrides;
+    std::vector<CheckResolver> resolvers;
+};
+
+struct PendingResolve {
+    LoadedMod* mod = nullptr;
+    bool fixedValue = false;
+    uint8_t itemNo = 0;
+    ItemCheckResolveFn fn = nullptr;
+    void* userData = nullptr;
+};
+
+std::unordered_map<LoadedMod*, ModItemChecks> s_modChecks;
+std::unordered_set<std::string> s_warnedCollisions;
+ItemCheckHandle s_nextCheckHandle = 1;
+
+const char* current_stage_name() {
+    const char* stageName = dComIfGp_getStartStageName();
+    return stageName != nullptr ? stageName : "";
+}
+
+std::string chest_check_name(uint8_t boxNo) {
+    return fmt::format("chest:{}:{}", current_stage_name(), boxNo);
+}
+
+std::string boss_check_name() {
+    return fmt::format("boss:{}", current_stage_name());
+}
+
+std::string freestanding_check_name(uint8_t bitNo) {
+    return fmt::format("freestanding:{}:{}", current_stage_name(), bitNo);
+}
+
+std::string poe_check_name(uint8_t bitNo) {
+    return fmt::format("poe:{}:{}", current_stage_name(), bitNo);
+}
+
+std::string shop_check_name(uint8_t itemNo) {
+    return fmt::format("shop:{}:{}", current_stage_name(), itemNo);
+}
+
+std::string bug_check_name(uint8_t insectId) {
+    return fmt::format("bug:{}", insectId);
+}
+
+std::string sky_character_check_name() {
+    return fmt::format("skychar:{}:{}", current_stage_name(), dStage_roomControl_c::getStayNo());
+}
+
+}  // namespace
+
+uint8_t item_check(const char* name, uint8_t itemNo, fopAc_ac_c* giver) {
+    if (name == nullptr || *name == '\0' || s_modChecks.empty()) {
+        return itemNo;
+    }
+
+    // Callbacks may change registrations, so copy the applicable chain before invoking one.
+    std::vector<PendingResolve> resolves;
+    LoadedMod* previousOverrideOwner = nullptr;
+    for (auto& mod : ModLoader::instance().mods()) {
+        if (!mod.active) {
+            continue;
+        }
+
+        const auto modIt = s_modChecks.find(&mod);
+        if (modIt == s_modChecks.end()) {
+            continue;
+        }
+
+        for (const auto& checkOverride : modIt->second.overrides) {
+            if (checkOverride.name != name) {
+                continue;
+            }
+            if (previousOverrideOwner != nullptr && s_warnedCollisions.emplace(name).second) {
+                Log.warn("check '{}' is overridden by [{}] and [{}]; [{}] wins by load order", name,
+                    previousOverrideOwner->metadata.id, mod.metadata.id, mod.metadata.id);
+            }
+            previousOverrideOwner = &mod;
+            resolves.push_back({.mod = &mod, .fixedValue = true, .itemNo = checkOverride.itemNo});
+        }
+
+        for (const auto& resolver : modIt->second.resolvers) {
+            if (resolver.name.empty() || resolver.name == name) {
+                resolves.push_back({.mod = &mod, .fn = resolver.fn, .userData = resolver.userData});
+            }
+        }
+    }
+
+    ItemCheckInfo info{
+        .name = name,
+        .giver_actor = giver,
+        .vanilla_item = itemNo,
+        .current_item = itemNo,
+    };
+    for (const auto& resolve : resolves) {
+        if (!resolve.mod->active) {
+            continue;
+        }
+        if (resolve.fixedValue) {
+            info.current_item = resolve.itemNo;
+            continue;
+        }
+
+        uint8_t resolvedItem = info.current_item;
+        try {
+            if (resolve.fn(resolve.mod->context.get(), &info, &resolvedItem, resolve.userData)) {
+                info.current_item = resolvedItem;
+            }
+        } catch (const std::exception& e) {
+            fail_mod(*resolve.mod, MOD_ERROR,
+                fmt::format("Exception in item check resolver for '{}': {}", name, e.what()));
+        } catch (...) {
+            fail_mod(*resolve.mod, MOD_ERROR,
+                fmt::format("Unknown exception in item check resolver for '{}'", name));
+        }
+    }
+    return info.current_item;
+}
+
+uint8_t item_check_chest(uint8_t boxNo, uint8_t itemNo, fopAc_ac_c* chest) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = chest_check_name(boxNo);
+    return item_check(name.c_str(), itemNo, chest);
+}
+
+uint8_t item_check_boss(uint8_t itemNo, fopAc_ac_c* boss) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = boss_check_name();
+    return item_check(name.c_str(), itemNo, boss);
+}
+
+uint8_t item_check_freestanding(uint8_t bitNo, uint8_t itemNo, fopAc_ac_c* item) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = freestanding_check_name(bitNo);
+    return item_check(name.c_str(), itemNo, item);
+}
+
+uint8_t item_check_poe(uint8_t bitNo, uint8_t itemNo, fopAc_ac_c* poe) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = poe_check_name(bitNo);
+    return item_check(name.c_str(), itemNo, poe);
+}
+
+uint8_t item_check_shop(uint8_t itemNo, fopAc_ac_c* giver) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = shop_check_name(itemNo);
+    return item_check(name.c_str(), itemNo, giver);
+}
+
+uint8_t item_check_bug(uint8_t insectId, uint8_t itemNo, fopAc_ac_c* agitha) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = bug_check_name(insectId);
+    return item_check(name.c_str(), itemNo, agitha);
+}
+
+uint8_t item_check_sky_character(uint8_t itemNo, fopAc_ac_c* statue) {
+    if (s_modChecks.empty()) {
+        return itemNo;
+    }
+    const auto name = sky_character_check_name();
+    return item_check(name.c_str(), itemNo, statue);
+}
+
+uint32_t item_give_tag_chest(uint8_t boxNo) {
+    return item_give_tag(chest_check_name(boxNo).c_str());
+}
+
+uint32_t item_give_tag_boss() {
+    return item_give_tag(boss_check_name().c_str());
+}
+
+uint32_t item_give_tag_freestanding(uint8_t bitNo) {
+    return item_give_tag(freestanding_check_name(bitNo).c_str());
+}
+
+uint32_t item_give_tag_poe(uint8_t bitNo) {
+    return item_give_tag(poe_check_name(bitNo).c_str());
+}
+
+uint32_t item_give_tag_shop(uint8_t itemNo) {
+    return item_give_tag(shop_check_name(itemNo).c_str());
+}
+
+uint32_t item_give_tag_bug(uint8_t insectId) {
+    return item_give_tag(bug_check_name(insectId).c_str());
+}
+
+uint32_t item_give_tag_sky_character() {
+    return item_give_tag(sky_character_check_name().c_str());
+}
+
+void item_check_enqueue_poe(uint8_t bitNo, uint8_t itemNo) {
+    item_check_enqueue(poe_check_name(bitNo).c_str(), itemNo);
+}
+
+namespace svc {
+
+ModResult item_check_set_override(LoadedMod& mod, const char* name, uint8_t itemNo) {
+    auto& checks = s_modChecks[&mod];
+    for (auto& checkOverride : checks.overrides) {
+        if (checkOverride.name == name) {
+            checkOverride.itemNo = itemNo;
+            return MOD_OK;
+        }
+    }
+    checks.overrides.push_back({.name = name, .itemNo = itemNo});
+    return MOD_OK;
+}
+
+ModResult item_check_clear_override(LoadedMod& mod, const char* name) {
+    const auto modIt = s_modChecks.find(&mod);
+    if (modIt == s_modChecks.end()) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    const auto removed = std::erase_if(modIt->second.overrides,
+        [&](const auto& checkOverride) { return checkOverride.name == name; });
+    return removed != 0 ? MOD_OK : MOD_INVALID_ARGUMENT;
+}
+
+ModResult item_check_add_resolver(LoadedMod& mod, const char* name, ItemCheckResolveFn fn,
+    void* userData, ItemCheckHandle& outHandle) {
+    auto& resolver = s_modChecks[&mod].resolvers.emplace_back();
+    resolver.handle = s_nextCheckHandle++;
+    resolver.name = name != nullptr ? name : "";
+    resolver.fn = fn;
+    resolver.userData = userData;
+    outHandle = resolver.handle;
+    return MOD_OK;
+}
+
+ModResult item_check_remove_resolver(LoadedMod& mod, ItemCheckHandle handle) {
+    const auto modIt = s_modChecks.find(&mod);
+    if (modIt == s_modChecks.end()) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    const auto removed = std::erase_if(
+        modIt->second.resolvers, [&](const auto& resolver) { return resolver.handle == handle; });
+    return removed != 0 ? MOD_OK : MOD_INVALID_ARGUMENT;
+}
+
+void item_checks_remove_mod(LoadedMod& mod) {
+    s_modChecks.erase(&mod);
+    s_warnedCollisions.clear();
+}
+
+}  // namespace svc
+}  // namespace dusk::mods

src/dusk/mods/item_gives.cpp

@@ -0,0 +1,343 @@
+#include "item.hpp"
+
+#include "dusk/mod_loader.hpp"
+#include "dusk/mods/loader/loader.hpp"
+#include "dusk/mods/svc/item.hpp"
+
+#include "aurora/lib/logging.hpp"
+#include "d/actor/d_a_alink.h"
+#include "d/d_com_inf_game.h"
+#include "d/d_item.h"
+#include "d/d_item_data.h"
+#include "f_op/f_op_actor_mng.h"
+
+#include <fmt/format.h>
+
+#include <deque>
+#include <exception>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+namespace dusk::mods {
+namespace {
+
+aurora::Module Log{"dusk::mods::item_gives"};
+
+// deque keeps previously returned c_str pointers valid if a callback interns another name.
+std::deque<std::string> s_giveNames;
+std::unordered_map<std::string, uint32_t> s_giveNameIds;
+
+const char* item_give_name(uint32_t tag) {
+    if (tag == 0 || tag > s_giveNames.size()) {
+        return nullptr;
+    }
+    return s_giveNames[tag - 1].c_str();
+}
+
+struct GiveObserver {
+    ItemGiveHandle handle = 0;
+    ItemGiveObserveFn fn = nullptr;
+    void* userData = nullptr;
+};
+
+struct PendingObserver {
+    LoadedMod* mod = nullptr;
+    ItemGiveObserveFn fn = nullptr;
+    void* userData = nullptr;
+};
+
+std::unordered_map<LoadedMod*, std::vector<GiveObserver>> s_modObservers;
+ItemGiveHandle s_nextGiveHandle = 1;
+size_t s_observerCount = 0;
+
+void notify_gives(const char* checkName, uint8_t itemNo, fopAc_ac_c* giver, ItemGiveOrigin origin) {
+    if (s_observerCount == 0) {
+        return;
+    }
+
+    // Callbacks may change registrations, so copy them before invoking one.
+    std::vector<PendingObserver> observers;
+    for (auto& mod : ModLoader::instance().mods()) {
+        if (!mod.active) {
+            continue;
+        }
+        const auto modIt = s_modObservers.find(&mod);
+        if (modIt == s_modObservers.end()) {
+            continue;
+        }
+        for (const auto& observer : modIt->second) {
+            observers.push_back({.mod = &mod, .fn = observer.fn, .userData = observer.userData});
+        }
+    }
+
+    const ItemGiveInfo info{
+        .check_name = checkName,
+        .giver_actor = giver,
+        .item = itemNo,
+        .origin = static_cast<uint8_t>(origin),
+    };
+    for (const auto& observer : observers) {
+        if (!observer.mod->active) {
+            continue;
+        }
+        try {
+            observer.fn(observer.mod->context.get(), &info, observer.userData);
+        } catch (const std::exception& e) {
+            fail_mod(*observer.mod, MOD_ERROR,
+                fmt::format("Exception in item give observer: {}", e.what()));
+        } catch (...) {
+            fail_mod(*observer.mod, MOD_ERROR, "Unknown exception in item give observer");
+        }
+    }
+}
+
+constexpr size_t kGiveQueueLimit = 64;
+constexpr int kGiveMaxRetries = 5;
+
+struct QueuedGive {
+    LoadedMod* owner = nullptr;
+    uint32_t tag = 0;
+    uint8_t itemNo = 0;
+    bool silent = false;
+    bool resolveAtDispatch = false;
+};
+
+std::deque<QueuedGive> s_giveQueue;
+QueuedGive s_inFlightGive{};
+uint8_t s_inFlightItem = 0;
+int s_inFlightRetries = 0;
+bool s_inFlight = false;
+bool s_inFlightSpawned = false;
+bool s_dispatchingSilent = false;
+
+bool safe_to_dispatch() {
+    daAlink_c* link = daAlink_getAlinkActorClass();
+    if (link == nullptr) {
+        return false;
+    }
+
+    // make sure player is in a safe action and not already in an event before dispatching
+    switch (link->mProcID) {
+    case daAlink_c::PROC_WAIT:
+    case daAlink_c::PROC_TIRED_WAIT:
+    case daAlink_c::PROC_MOVE:
+    case daAlink_c::PROC_WOLF_WAIT:
+    case daAlink_c::PROC_WOLF_TIRED_WAIT:
+    case daAlink_c::PROC_WOLF_MOVE:
+    case daAlink_c::PROC_ATN_MOVE:
+    case daAlink_c::PROC_WOLF_ATN_AC_MOVE:
+        break;
+    default:
+        return false;
+    }
+    if (link->checkEventRun()) {
+        return false;
+    }
+
+    int itemId = 0;
+    return link->mMsgFlow.getEventId(&itemId) == 0;
+}
+
+bool resolve_queued_give(const QueuedGive& give, ItemGiveOrigin origin, uint8_t& outItem) {
+    outItem = give.itemNo;
+    if (give.resolveAtDispatch) {
+        outItem = item_check(item_give_name(give.tag), give.itemNo, nullptr);
+    }
+    if (outItem != dItemNo_NONE_e) {
+        return true;
+    }
+
+    notify_gives(item_give_name(give.tag), dItemNo_NONE_e, nullptr, origin);
+    return false;
+}
+
+void dispatch_silent_give(const QueuedGive& give) {
+    uint8_t itemNo = 0;
+    if (!resolve_queued_give(give, ITEM_GIVE_ORIGIN_QUEUE_SILENT, itemNo)) {
+        return;
+    }
+
+    Log.debug("dispatching silent item {:#x} for '{}'", itemNo,
+        item_give_name(give.tag) != nullptr ? item_give_name(give.tag) : "");
+    s_dispatchingSilent = true;
+    execItemGet(itemNo, give.tag, nullptr);
+    s_dispatchingSilent = false;
+}
+
+void dispatch_demo_give() {
+    Log.debug("dispatching item {:#x} for '{}'", s_inFlightItem,
+        item_give_name(s_inFlightGive.tag) != nullptr ? item_give_name(s_inFlightGive.tag) : "");
+
+    daAlink_c* link = daAlink_getAlinkActorClass();
+    dComIfGp_getEvent()->setGtItm(s_inFlightItem);
+    link->mProcID = daAlink_c::PROC_GET_ITEM;
+    const s16 eventIndex = dComIfGp_getEventManager().getEventIdx(link, "DEFAULT_GETITEM", 0xFF);
+    fopAcM_orderChangeEventId(link, eventIndex, 1, 0xFFFF);
+}
+
+}  // namespace
+
+uint32_t item_give_tag(const char* name) {
+    if (name == nullptr || *name == '\0') {
+        return 0;
+    }
+    if (const auto it = s_giveNameIds.find(name); it != s_giveNameIds.end()) {
+        return it->second;
+    }
+
+    s_giveNames.emplace_back(name);
+    const auto tag = static_cast<uint32_t>(s_giveNames.size());
+    s_giveNameIds.emplace(s_giveNames.back(), tag);
+    return tag;
+}
+
+uint8_t item_check_tagged(uint32_t giveTag, uint8_t itemNo, fopAc_ac_c* giver) {
+    const char* name = item_give_name(giveTag);
+    return name != nullptr ? item_check(name, itemNo, giver) : itemNo;
+}
+
+void item_check_enqueue(const char* name, uint8_t itemNo) {
+    if (s_giveQueue.size() >= kGiveQueueLimit) {
+        Log.warn("item give queue is full; dropping check '{}'", name != nullptr ? name : "");
+        return;
+    }
+    s_giveQueue.push_back({
+        .tag = item_give_tag(name),
+        .itemNo = itemNo,
+        .resolveAtDispatch = true,
+    });
+}
+
+void item_granted(uint8_t itemNo, uint32_t giveTag, fopAc_ac_c* giver) {
+    ItemGiveOrigin origin = ITEM_GIVE_ORIGIN_GAME;
+    if (s_dispatchingSilent) {
+        origin = ITEM_GIVE_ORIGIN_QUEUE_SILENT;
+    } else if (s_inFlight && itemNo == s_inFlightItem && giveTag == s_inFlightGive.tag) {
+        origin = ITEM_GIVE_ORIGIN_QUEUE;
+        s_inFlight = false;
+        s_inFlightSpawned = false;
+    }
+    notify_gives(item_give_name(giveTag), itemNo, giver, origin);
+}
+
+bool item_give_queue_dispatching() {
+    return s_inFlight && !s_inFlightSpawned;
+}
+
+uint32_t item_give_queue_take_tag() {
+    if (!item_give_queue_dispatching()) {
+        return 0;
+    }
+    s_inFlightSpawned = true;
+    return s_inFlightGive.tag;
+}
+
+namespace svc {
+
+void item_gives_tick() {
+    if ((!s_inFlight && s_giveQueue.empty()) || !safe_to_dispatch()) {
+        return;
+    }
+
+    if (s_inFlight) {
+        if (++s_inFlightRetries > kGiveMaxRetries) {
+            Log.error("item {:#x} for '{}' did not complete after {} attempts; dropping it",
+                s_inFlightItem,
+                item_give_name(s_inFlightGive.tag) != nullptr ? item_give_name(s_inFlightGive.tag) :
+                                                                "",
+                kGiveMaxRetries);
+            s_inFlight = false;
+            s_inFlightSpawned = false;
+            return;
+        }
+        s_inFlightSpawned = false;
+        dispatch_demo_give();
+        return;
+    }
+
+    while (!s_giveQueue.empty() && s_giveQueue.front().silent) {
+        const QueuedGive give = s_giveQueue.front();
+        s_giveQueue.pop_front();
+        dispatch_silent_give(give);
+    }
+    if (s_giveQueue.empty()) {
+        return;
+    }
+
+    const QueuedGive give = s_giveQueue.front();
+    uint8_t itemNo = 0;
+    if (!resolve_queued_give(give, ITEM_GIVE_ORIGIN_QUEUE, itemNo)) {
+        s_giveQueue.pop_front();
+        return;
+    }
+
+    s_giveQueue.pop_front();
+    s_inFlightGive = give;
+    s_inFlightItem = itemNo;
+    s_inFlightRetries = 0;
+    s_inFlight = true;
+    s_inFlightSpawned = false;
+    dispatch_demo_give();
+}
+
+void item_gives_clear() {
+    if (!s_giveQueue.empty() || s_inFlight) {
+        Log.info("dropping {} pending item give(s)",
+            s_giveQueue.size() + static_cast<size_t>(s_inFlight));
+    }
+    s_giveQueue.clear();
+    s_inFlight = false;
+    s_inFlightSpawned = false;
+}
+
+ModResult item_give_enqueue(LoadedMod& mod, const char* checkName, uint8_t itemNo, uint32_t flags) {
+    if (s_giveQueue.size() >= kGiveQueueLimit) {
+        return MOD_UNAVAILABLE;
+    }
+    s_giveQueue.push_back({
+        .owner = &mod,
+        .tag = item_give_tag(checkName),
+        .itemNo = itemNo,
+        .silent = (flags & ITEM_GIVE_SILENT) != 0,
+        .resolveAtDispatch = (flags & ITEM_GIVE_RESOLVE) != 0,
+    });
+    return MOD_OK;
+}
+
+ModResult item_give_add_observer(
+    LoadedMod& mod, ItemGiveObserveFn fn, void* userData, ItemGiveHandle& outHandle) {
+    auto& observer = s_modObservers[&mod].emplace_back();
+    observer.handle = s_nextGiveHandle++;
+    observer.fn = fn;
+    observer.userData = userData;
+    outHandle = observer.handle;
+    ++s_observerCount;
+    return MOD_OK;
+}
+
+ModResult item_give_remove_observer(LoadedMod& mod, ItemGiveHandle handle) {
+    const auto modIt = s_modObservers.find(&mod);
+    if (modIt == s_modObservers.end()) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    const auto removed = std::erase_if(
+        modIt->second, [&](const auto& observer) { return observer.handle == handle; });
+    s_observerCount -= removed;
+    return removed != 0 ? MOD_OK : MOD_INVALID_ARGUMENT;
+}
+
+void item_gives_remove_mod(LoadedMod& mod) {
+    if (const auto modIt = s_modObservers.find(&mod); modIt != s_modObservers.end()) {
+        s_observerCount -= modIt->second.size();
+        s_modObservers.erase(modIt);
+    }
+    std::erase_if(s_giveQueue, [&](const QueuedGive& give) { return give.owner == &mod; });
+    if (s_inFlight && s_inFlightGive.owner == &mod) {
+        // The event system already owns this grant, so it can no longer be canceled safely.
+        s_inFlightGive.owner = nullptr;
+    }
+}
+
+}  // namespace svc
+}  // namespace dusk::mods

src/dusk/mods/svc/item.cpp

@@ -0,0 +1,151 @@
+#include "item.hpp"
+
+#include "registry.hpp"
+
+#include "dusk/mods/item.hpp"
+#include "dusk/mods/loader/loader.hpp"
+
+#include "d/d_item_data.h"
+
+#include <string_view>
+
+namespace dusk::mods::svc {
+namespace {
+
+constexpr size_t kMaxCheckNameLength = 256;
+constexpr uint32_t kGiveFlagMask = ITEM_GIVE_SILENT | ITEM_GIVE_RESOLVE;
+
+bool is_valid_check_name(const char* name) {
+    if (name == nullptr) {
+        return false;
+    }
+    const std::string_view view{name};
+    return !view.empty() && view.size() <= kMaxCheckNameLength;
+}
+
+ModResult item_set_check_override(ModContext* context, const char* name, uint8_t itemNo) {
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || !is_valid_check_name(name)) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    return item_check_set_override(*mod, name, itemNo);
+}
+
+ModResult item_clear_check_override(ModContext* context, const char* name) {
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || !is_valid_check_name(name)) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    return item_check_clear_override(*mod, name);
+}
+
+ModResult item_set_check_resolver(ModContext* context, const char* name, ItemCheckResolveFn fn,
+    void* userData, ItemCheckHandle* outHandle) {
+    if (outHandle != nullptr) {
+        *outHandle = 0;
+    }
+
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || fn == nullptr || (name != nullptr && !is_valid_check_name(name))) {
+        return MOD_INVALID_ARGUMENT;
+    }
+
+    ItemCheckHandle handle = 0;
+    const auto result = item_check_add_resolver(*mod, name, fn, userData, handle);
+    if (outHandle != nullptr) {
+        *outHandle = handle;
+    }
+    return result;
+}
+
+ModResult item_clear_check_resolver(ModContext* context, ItemCheckHandle handle) {
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || handle == 0) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    return item_check_remove_resolver(*mod, handle);
+}
+
+ModResult item_resolve_check(
+    ModContext* context, const char* name, uint8_t originalItemNo, uint8_t* outItem) {
+    if (mod_from_context(context) == nullptr || !is_valid_check_name(name) || outItem == nullptr) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    *outItem = item_check(name, originalItemNo, nullptr);
+    return MOD_OK;
+}
+
+ModResult item_give_item(
+    ModContext* context, const char* checkName, uint8_t itemNo, uint32_t flags) {
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || (checkName != nullptr && !is_valid_check_name(checkName)) ||
+        (flags & ~kGiveFlagMask) != 0)
+    {
+        return MOD_INVALID_ARGUMENT;
+    }
+    if ((flags & ITEM_GIVE_RESOLVE) != 0) {
+        if (checkName == nullptr) {
+            return MOD_INVALID_ARGUMENT;
+        }
+    } else if (itemNo == dItemNo_NONE_e) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    return item_give_enqueue(*mod, checkName, itemNo, flags);
+}
+
+ModResult item_observe_gives(
+    ModContext* context, ItemGiveObserveFn fn, void* userData, ItemGiveHandle* outHandle) {
+    if (outHandle != nullptr) {
+        *outHandle = 0;
+    }
+
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || fn == nullptr) {
+        return MOD_INVALID_ARGUMENT;
+    }
+
+    ItemGiveHandle handle = 0;
+    const auto result = item_give_add_observer(*mod, fn, userData, handle);
+    if (outHandle != nullptr) {
+        *outHandle = handle;
+    }
+    return result;
+}
+
+ModResult item_unobserve_gives(ModContext* context, ItemGiveHandle handle) {
+    auto* mod = mod_from_context(context);
+    if (mod == nullptr || handle == 0) {
+        return MOD_INVALID_ARGUMENT;
+    }
+    return item_give_remove_observer(*mod, handle);
+}
+
+constexpr ItemService s_itemService{
+    .header = SERVICE_HEADER(ItemService, ITEM_SERVICE_MAJOR, ITEM_SERVICE_MINOR),
+    .set_check_override = item_set_check_override,
+    .clear_check_override = item_clear_check_override,
+    .set_check_resolver = item_set_check_resolver,
+    .clear_check_resolver = item_clear_check_resolver,
+    .resolve_check = item_resolve_check,
+    .give_item = item_give_item,
+    .observe_gives = item_observe_gives,
+    .unobserve_gives = item_unobserve_gives,
+};
+
+}  // namespace
+
+constinit const ServiceModule g_itemModule{
+    .id = ITEM_SERVICE_ID,
+    .majorVersion = ITEM_SERVICE_MAJOR,
+    .minorVersion = ITEM_SERVICE_MINOR,
+    .service = &s_itemService,
+    .modDetached =
+        [](LoadedMod& mod) {
+            item_checks_remove_mod(mod);
+            item_gives_remove_mod(mod);
+        },
+    .frameEnd = item_gives_tick,
+    .shutdown = item_gives_clear,
+};
+
+}  // namespace dusk::mods::svc

src/dusk/mods/svc/item.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "mods/svc/item.h"
+
+#include <cstdint>
+
+namespace dusk::mods {
+
+struct LoadedMod;
+
+namespace svc {
+
+ModResult item_check_set_override(LoadedMod& mod, const char* name, uint8_t itemNo);
+ModResult item_check_clear_override(LoadedMod& mod, const char* name);
+ModResult item_check_add_resolver(LoadedMod& mod, const char* name, ItemCheckResolveFn fn,
+    void* userData, ItemCheckHandle& outHandle);
+ModResult item_check_remove_resolver(LoadedMod& mod, ItemCheckHandle handle);
+void item_checks_remove_mod(LoadedMod& mod);
+
+ModResult item_give_enqueue(LoadedMod& mod, const char* checkName, uint8_t itemNo, uint32_t flags);
+ModResult item_give_add_observer(
+    LoadedMod& mod, ItemGiveObserveFn fn, void* userData, ItemGiveHandle& outHandle);
+ModResult item_give_remove_observer(LoadedMod& mod, ItemGiveHandle handle);
+void item_gives_remove_mod(LoadedMod& mod);
+void item_gives_tick();
+void item_gives_clear();
+
+}  // namespace svc
+}  // namespace dusk::mods

src/dusk/mods/svc/registry.cpp

@@ -213,6 +213,7 @@ void ModLoader::init_services() {
             &svc::g_gfxModule,
             &svc::g_saveModule,
             &svc::g_stageModule,
+            &svc::g_itemModule,
         })
     {
         svc::register_module(*module);

src/dusk/mods/svc/registry.hpp

@@ -75,5 +75,6 @@ extern const ServiceModule g_windowModule;
 extern const ServiceModule g_gfxModule;
 extern const ServiceModule g_saveModule;
 extern const ServiceModule g_stageModule;
+extern const ServiceModule g_itemModule;
 
 }  // namespace dusk::mods::svc

src/dusk/mods/svc/save.cpp

@@ -1,5 +1,6 @@
 #include "save.hpp"
 
+#include "item.hpp"
 #include "registry.hpp"
 
 #include "aurora/lib/logging.hpp"
@@ -164,6 +165,7 @@ void save_slot_new(uint32_t slot) {
     store.mods.clear();
     store.snapshotValid = false;
     s_currentSlot = static_cast<int32_t>(slot);
+    item_gives_clear();
     Log.info("new save in slot {}; mod blob store cleared", slot);
     notify(slot, &SaveObserverRecord::onNewSave, "new-save");
 }
@@ -183,6 +185,7 @@ void save_slot_loaded(uint32_t slot, const void* slotData) {
         }
     }
     s_currentSlot = static_cast<int32_t>(slot);
+    item_gives_clear();
     notify(slot, &SaveObserverRecord::onLoaded, "save-loaded");
 }
 
@@ -222,6 +225,7 @@ void save_slot_erased(uint32_t slot) {
 
 void save_no_slot() {
     s_currentSlot = -1;
+    item_gives_clear();
 }
 
 namespace {

src/f_op/f_op_actor.cpp

@@ -454,6 +454,10 @@ static int fopAc_Create(void* i_this) {
         actor->cullType = profile->cullType;
 
         fopAcM_prm_class* append = fopAcM_GetAppend(actor);
+#if TARGET_PC
+        actor->mItemGiveTag = append != NULL ? append->mItemGiveTag : 0;
+        actor->mItemGiveOriginalNo = append != NULL ? append->mItemGiveOriginalNo : 0xFF;
+#endif
         if (append != NULL) {
             fopAcM_SetParam(actor, append->base.parameters);
             actor->home.pos = append->base.position;

src/f_op/f_op_actor_mng.cpp

@@ -184,19 +184,22 @@ fopAcM_prm_class* fopAcM_CreateAppend() {
         append->scale.z = 10;
         append->parent_id = fpcM_ERROR_PROCESS_ID_e;
         append->argument = -1;
+        IF_DUSK(append->mItemGiveOriginalNo = 0xFF;)
     }
     return append;
 }
 
 fopAcM_prm_class* createAppend(u16 i_setId, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                               const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                               fpc_ProcID i_parentId) {
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
+    fpc_ProcID i_parentId IF_DUSK_ARG(u32 i_itemGiveTag) IF_DUSK_ARG(u8 i_itemOriginalNo)) {
     fopAcM_prm_class* append = fopAcM_CreateAppend();
     if (append == NULL) {
         return NULL;
     }
 
     append->base.setID = i_setId;
+    IF_DUSK(append->mItemGiveTag = i_itemGiveTag;)
+    IF_DUSK(append->mItemGiveOriginalNo = i_itemOriginalNo;)
 
     if (i_pos != NULL) {
         append->base.position = *i_pos;
@@ -253,10 +256,10 @@ s32 fopAcM_delete(fpc_ProcID i_actorID) {
 }
 
 fpc_ProcID fopAcM_create(s16 i_procName, u16 i_setId, u32 i_parameters, const cXyz* i_pos,
-                         int i_roomNo, const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                         createFunc i_createFunc) {
+    int i_roomNo, const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
+    createFunc i_createFunc IF_DUSK_ARG(u32 i_itemGiveTag)) {
     fopAcM_prm_class* append = createAppend(i_setId, i_parameters, i_pos, i_roomNo, i_angle,
-                                            i_scale, i_argument, fpcM_ERROR_PROCESS_ID_e);
+        i_scale, i_argument, fpcM_ERROR_PROCESS_ID_e IF_DUSK_ARG(i_itemGiveTag));
     if (append == NULL) {
         return fpcM_ERROR_PROCESS_ID_e;
     }
@@ -265,16 +268,17 @@ fpc_ProcID fopAcM_create(s16 i_procName, u16 i_setId, u32 i_parameters, const cX
 }
 
 fpc_ProcID fopAcM_create(s16 i_procName, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                         const csXyz* i_angle, const cXyz* i_scale, s8 i_argument) {
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument IF_DUSK_ARG(u32 i_itemGiveTag)) {
     return fopAcM_create(i_procName, 0xFFFF, i_parameters, i_pos, i_roomNo, i_angle, i_scale,
-                         i_argument, NULL);
+        i_argument, NULL IF_DUSK_ARG(i_itemGiveTag));
 }
 
 fopAc_ac_c* fopAcM_fastCreate(s16 i_procName, u32 i_parameters, const cXyz* i_pos, int i_roomNo,
-                              const csXyz* i_angle, const cXyz* i_scale, s8 i_argument,
-                              createFunc i_createFunc, void* i_createFuncData) {
-    fopAcM_prm_class* append = createAppend(0xFFFF, i_parameters, i_pos, i_roomNo, i_angle, i_scale,
-                                            i_argument, fpcM_ERROR_PROCESS_ID_e);
+    const csXyz* i_angle, const cXyz* i_scale, s8 i_argument, createFunc i_createFunc,
+    void* i_createFuncData IF_DUSK_ARG(u32 i_itemGiveTag) IF_DUSK_ARG(u8 i_itemOriginalNo)) {
+    fopAcM_prm_class* append =
+        createAppend(0xFFFF, i_parameters, i_pos, i_roomNo, i_angle, i_scale, i_argument,
+            fpcM_ERROR_PROCESS_ID_e IF_DUSK_ARG(i_itemGiveTag) IF_DUSK_ARG(i_itemOriginalNo));
     if (append == NULL) {
         return NULL;
     }
@@ -1385,8 +1389,8 @@ fopAc_ac_c* fopAcM_getEventPartner(fopAc_ac_c const* i_actor) {
 }
 
 fpc_ProcID fopAcM_createItemForPresentDemo(cXyz const* i_pos, int i_itemNo, u8 param_2,
-                                           int i_itemBitNo, int i_roomNo, csXyz const* i_angle,
-                                           cXyz const* i_scale) {
+    int i_itemBitNo, int i_roomNo, csXyz const* i_angle,
+    cXyz const* i_scale IF_DUSK_ARG(u32 i_itemGiveTag)) {
     JUT_ASSERT(3214, 0 <= i_itemNo && i_itemNo < 256);
     dComIfGp_event_setGtItm(i_itemNo);
 
@@ -1395,14 +1399,14 @@ fpc_ProcID fopAcM_createItemForPresentDemo(cXyz const* i_pos, int i_itemNo, u8 p
         return fpcM_ERROR_PROCESS_ID_e;
     }
 
-    return fopAcM_createDemoItem(i_pos, i_itemNo, i_itemBitNo, i_angle, i_roomNo, i_scale, param_2);
+    return fopAcM_createDemoItem(i_pos, i_itemNo, i_itemBitNo, i_angle, i_roomNo, i_scale,
+        param_2 IF_DUSK_ARG(i_itemGiveTag));
 }
 
 fpc_ProcID fopAcM_createItemForTrBoxDemo(cXyz const* i_pos, int i_itemNo, int i_itemBitNo,
-                                         int i_roomNo, csXyz const* i_angle, cXyz const* i_scale) {
-   
-   JUT_ASSERT(3259, 0 <= i_itemNo && i_itemNo < 256);
-   dComIfGp_event_setGtItm(i_itemNo);
+    int i_roomNo, csXyz const* i_angle, cXyz const* i_scale IF_DUSK_ARG(u32 i_itemGiveTag)) {
+    JUT_ASSERT(3259, 0 <= i_itemNo && i_itemNo < 256);
+    dComIfGp_event_setGtItm(i_itemNo);
 
     if (i_itemNo == dItemNo_NONE_e) {
         OS_REPORT("ゲットデモ用なのに「ハズレ」です！[%d]\n", i_itemNo); // Even though it is for a Get Demo, it is a 'Miss'!
@@ -1410,7 +1414,8 @@ fpc_ProcID fopAcM_createItemForTrBoxDemo(cXyz const* i_pos, int i_itemNo, int i_
     }
 
     u8 param_7 = 0;
-    return fopAcM_createDemoItem(i_pos, i_itemNo, i_itemBitNo, i_angle, i_roomNo, i_scale, param_7);
+    return fopAcM_createDemoItem(i_pos, i_itemNo, i_itemBitNo, i_angle, i_roomNo, i_scale,
+        param_7 IF_DUSK_ARG(i_itemGiveTag));
 }
 
 struct ItemTableList {
@@ -1566,8 +1571,8 @@ fpc_ProcID fopAcM_createItemFromTable(cXyz const* i_pos, int i_itemNo, int i_ite
 }
 
 fpc_ProcID fopAcM_createDemoItem(const cXyz* i_pos, int i_itemNo, int i_itemBitNo,
-                                 const csXyz* i_angle, int i_roomNo, const cXyz* scale,
-                                 u8 param_7) {
+    const csXyz* i_angle, int i_roomNo, const cXyz* scale,
+    u8 param_7 IF_DUSK_ARG(u32 i_itemGiveTag)) {
     // clang-format off
     JUT_ASSERT(3824, 0 <= i_itemNo && i_itemNo < 256 && (-1 <= i_itemBitNo && i_itemBitNo < (dSv_info_c::DAN_ITEM + dSv_info_c::MEMORY_ITEM + dSv_info_c::ZONE_ITEM )) || i_itemBitNo == 255);
     // clang-format on
@@ -1577,17 +1582,29 @@ fpc_ProcID fopAcM_createDemoItem(const cXyz* i_pos, int i_itemNo, int i_itemBitN
     }
 
     u32 params = (i_itemNo & 0xFF) << 0x0 | (i_itemBitNo & 0x7F) << 0x8 | (param_7 & 0xFF) << 0x10;
-    return fopAcM_create(fpcNm_Demo_Item_e, params, i_pos, i_roomNo, i_angle, scale, -1);
+    return fopAcM_create(
+        fpcNm_Demo_Item_e, params, i_pos, i_roomNo, i_angle, scale, -1 IF_DUSK_ARG(i_itemGiveTag));
 }
 
 fpc_ProcID fopAcM_createItemForBoss(const cXyz* i_pos, int i_itemNo, int i_roomNo,
-                                    const csXyz* i_angle, const cXyz* i_scale, f32 i_speedF,
-                                    f32 i_speedY, int param_8) {
+    const csXyz* i_angle, const cXyz* i_scale, f32 i_speedF, f32 i_speedY,
+    int param_8 IF_DUSK_ARG(const char* i_itemCheckName)) {
     int _ = -1;
+#if TARGET_PC
+    const u8 originalItemNo = i_itemNo & 0xFF;
+    u32 giveTag;
+    if (i_itemCheckName != NULL) {
+        i_itemNo = dusk::mods::item_check(i_itemCheckName, originalItemNo, NULL);
+        giveTag = dusk::mods::item_give_tag(i_itemCheckName);
+    } else {
+        i_itemNo = dusk::mods::item_check_boss(originalItemNo, NULL);
+        giveTag = dusk::mods::item_give_tag_boss();
+    }
+#endif
     u32 params = 0xFFFF0000 | param_8 << 8 | (i_itemNo & 0xFF);
 
-    fopAc_ac_c* actor = fopAcM_fastCreate(fpcNm_Obj_LifeContainer_e, params, i_pos, i_roomNo, i_angle,
-                                          i_scale, -1, NULL, NULL);
+    fopAc_ac_c* actor = fopAcM_fastCreate(fpcNm_Obj_LifeContainer_e, params, i_pos, i_roomNo,
+        i_angle, i_scale, -1, NULL, NULL IF_DUSK_ARG(giveTag) IF_DUSK_ARG(originalItemNo));
     if (actor != NULL) {
         actor->speedF = i_speedF;
         actor->speed.y = i_speedY;