diff --git a/src/game/game_00c490.c b/src/game/game_00c490.c
index 8d68c2036..7d5e4ead5 100644
--- a/src/game/game_00c490.c
+++ b/src/game/game_00c490.c
@@ -3313,7 +3313,7 @@ glabel func0f00eb64
 /*  f00f0d8:	02028021 */ 	addu	$s0,$s0,$v0
 /*  f00f0dc:	51e00005 */ 	beqzl	$t7,.L0f00f0f4
 /*  f00f0e0:	02002025 */ 	or	$a0,$s0,$zero
-/*  f00f0e4:	0fc61533 */ 	jal	func0f1854cc
+/*  f00f0e4:	0fc61533 */ 	jal	scenarioCallback08
 /*  f00f0e8:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f00f0ec:	02028021 */ 	addu	$s0,$s0,$v0
 /*  f00f0f0:	02002025 */ 	or	$a0,$s0,$zero
@@ -4623,7 +4623,7 @@ glabel func0f00f174
 /*  f010404:	8defa2d8 */ 	lw	$t7,-0x5d28($t7)
 /*  f010408:	11e00003 */ 	beqz	$t7,.L0f010418
 /*  f01040c:	00000000 */ 	sll	$zero,$zero,0x0
-/*  f010410:	0fc61548 */ 	jal	func0f185520
+/*  f010410:	0fc61548 */ 	jal	scenarioCallback0c
 /*  f010414:	00000000 */ 	sll	$zero,$zero,0x0
 .L0f010418:
 /*  f010418:	3c12800a */ 	lui	$s2,0x800a
diff --git a/src/game/game_176d70.c b/src/game/game_176d70.c
index d56bbf0ed..dfafeca55 100644
--- a/src/game/game_176d70.c
+++ b/src/game/game_176d70.c
@@ -10151,9 +10151,9 @@ glabel func0f17ff8c
 /*  f17ffd8:	00000000 */ 	sll	$zero,$zero,0x0
 );
 
-bool scenarioBriefcaseCallback08(void)
+s32 scenarioBriefcaseCallback08(void)
 {
-	return true;
+	return 1;
 }
 
 GLOBAL_ASM(
@@ -11190,7 +11190,7 @@ glabel scenarioCaptureCallback04
 /*  f180e18:	27bd0038 */ 	addiu	$sp,$sp,0x38
 );
 
-u32 scenarioCaptureCallback08(void)
+s32 scenarioCaptureCallback08(void)
 {
 	return 4;
 }
@@ -13302,7 +13302,7 @@ glabel scenarioHackerCallback04
 /*  f182b98:	ac20c24c */ 	sw	$zero,-0x3db4($at)
 );
 
-u32 scenarioHackerCallback08(void)
+s32 scenarioHackerCallback08(void)
 {
 	return 2;
 }
@@ -16076,7 +16076,7 @@ glabel menuhandler00185068
 /*  f185214:	1633ffef */ 	bne	$s1,$s3,.L0f1851d4
 /*  f185218:	26100006 */ 	addiu	$s0,$s0,0x6
 .L0f18521c:
-/*  f18521c:	0fc61521 */ 	jal	func0f185484
+/*  f18521c:	0fc61521 */ 	jal	scenarioCallback04
 /*  f185220:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f185224:	1000004d */ 	beqz	$zero,.L0f18535c
 /*  f185228:	00001025 */ 	or	$v0,$zero,$zero
@@ -16244,77 +16244,30 @@ glabel func0f185428
 /*  f185480:	00000000 */ 	sll	$zero,$zero,0x0
 );
 
-GLOBAL_ASM(
-glabel func0f185484
-/*  f185484:	3c0e800b */ 	lui	$t6,0x800b
-/*  f185488:	91cecb98 */ 	lbu	$t6,-0x3468($t6)
-/*  f18548c:	3c028008 */ 	lui	$v0,0x8008
-/*  f185490:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*  f185494:	000e78c0 */ 	sll	$t7,$t6,0x3
-/*  f185498:	01ee7821 */ 	addu	$t7,$t7,$t6
-/*  f18549c:	000f78c0 */ 	sll	$t7,$t7,0x3
-/*  f1854a0:	004f1021 */ 	addu	$v0,$v0,$t7
-/*  f1854a4:	8c426f9c */ 	lw	$v0,0x6f9c($v0)
-/*  f1854a8:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*  f1854ac:	50400004 */ 	beqzl	$v0,.L0f1854c0
-/*  f1854b0:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*  f1854b4:	0040f809 */ 	jalr	$v0
-/*  f1854b8:	00000000 */ 	sll	$zero,$zero,0x0
-/*  f1854bc:	8fbf0014 */ 	lw	$ra,0x14($sp)
-.L0f1854c0:
-/*  f1854c0:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*  f1854c4:	03e00008 */ 	jr	$ra
-/*  f1854c8:	00000000 */ 	sll	$zero,$zero,0x0
-);
+void scenarioCallback04(void)
+{
+	if (g_MpScenarios[g_MpSetup.scenario].unk04) {
+		g_MpScenarios[g_MpSetup.scenario].unk04();
+	}
+}
 
-GLOBAL_ASM(
-glabel func0f1854cc
-/*  f1854cc:	3c0e800b */ 	lui	$t6,0x800b
-/*  f1854d0:	91cecb98 */ 	lbu	$t6,-0x3468($t6)
-/*  f1854d4:	3c028008 */ 	lui	$v0,0x8008
-/*  f1854d8:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*  f1854dc:	000e78c0 */ 	sll	$t7,$t6,0x3
-/*  f1854e0:	01ee7821 */ 	addu	$t7,$t7,$t6
-/*  f1854e4:	000f78c0 */ 	sll	$t7,$t7,0x3
-/*  f1854e8:	004f1021 */ 	addu	$v0,$v0,$t7
-/*  f1854ec:	8c426fa0 */ 	lw	$v0,0x6fa0($v0)
-/*  f1854f0:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*  f1854f4:	00001825 */ 	or	$v1,$zero,$zero
-/*  f1854f8:	50400005 */ 	beqzl	$v0,.L0f185510
-/*  f1854fc:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*  f185500:	0040f809 */ 	jalr	$v0
-/*  f185504:	00000000 */ 	sll	$zero,$zero,0x0
-/*  f185508:	00401825 */ 	or	$v1,$v0,$zero
-/*  f18550c:	8fbf0014 */ 	lw	$ra,0x14($sp)
-.L0f185510:
-/*  f185510:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*  f185514:	00601025 */ 	or	$v0,$v1,$zero
-/*  f185518:	03e00008 */ 	jr	$ra
-/*  f18551c:	00000000 */ 	sll	$zero,$zero,0x0
-);
+s32 scenarioCallback08(void)
+{
+	s32 result = 0;
 
-GLOBAL_ASM(
-glabel func0f185520
-/*  f185520:	3c0e800b */ 	lui	$t6,0x800b
-/*  f185524:	91cecb98 */ 	lbu	$t6,-0x3468($t6)
-/*  f185528:	3c028008 */ 	lui	$v0,0x8008
-/*  f18552c:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*  f185530:	000e78c0 */ 	sll	$t7,$t6,0x3
-/*  f185534:	01ee7821 */ 	addu	$t7,$t7,$t6
-/*  f185538:	000f78c0 */ 	sll	$t7,$t7,0x3
-/*  f18553c:	004f1021 */ 	addu	$v0,$v0,$t7
-/*  f185540:	8c426fa4 */ 	lw	$v0,0x6fa4($v0)
-/*  f185544:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*  f185548:	50400004 */ 	beqzl	$v0,.L0f18555c
-/*  f18554c:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*  f185550:	0040f809 */ 	jalr	$v0
-/*  f185554:	00000000 */ 	sll	$zero,$zero,0x0
-/*  f185558:	8fbf0014 */ 	lw	$ra,0x14($sp)
-.L0f18555c:
-/*  f18555c:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*  f185560:	03e00008 */ 	jr	$ra
-/*  f185564:	00000000 */ 	sll	$zero,$zero,0x0
-);
+	if (g_MpScenarios[g_MpSetup.scenario].unk08) {
+		result = g_MpScenarios[g_MpSetup.scenario].unk08();
+	}
+
+	return result;
+}
+
+void scenarioCallback0c(void)
+{
+	if (g_MpScenarios[g_MpSetup.scenario].unk0c) {
+		g_MpScenarios[g_MpSetup.scenario].unk0c();
+	}
+}
 
 GLOBAL_ASM(
 glabel func0f185568
diff --git a/src/game/game_187770.c b/src/game/game_187770.c
index 09bc97aa6..f5055e70f 100644
--- a/src/game/game_187770.c
+++ b/src/game/game_187770.c
@@ -7763,7 +7763,7 @@ glabel func0f18dcec
 /*  f18dd1c:	3c10800b */ 	lui	$s0,%hi(g_MpSetup)
 /*  f18dd20:	2610cb88 */ 	addiu	$s0,$s0,%lo(g_MpSetup)
 /*  f18dd24:	0080f025 */ 	or	$s8,$a0,$zero
-/*  f18dd28:	0fc61521 */ 	jal	func0f185484
+/*  f18dd28:	0fc61521 */ 	jal	scenarioCallback04
 /*  f18dd2c:	a20e0010 */ 	sb	$t6,0x10($s0)
 /*  f18dd30:	03c0c825 */ 	or	$t9,$s8,$zero
 /*  f18dd34:	02004025 */ 	or	$t0,$s0,$zero
@@ -7949,7 +7949,7 @@ glabel func0f18df5c
 /*  f18dfb4:	02602025 */ 	or	$a0,$s3,$zero
 /*  f18dfb8:	0fc354fe */ 	jal	func0f0d53f8
 /*  f18dfbc:	24050003 */ 	addiu	$a1,$zero,0x3
-/*  f18dfc0:	0fc61521 */ 	jal	func0f185484
+/*  f18dfc0:	0fc61521 */ 	jal	scenarioCallback04
 /*  f18dfc4:	a2a20010 */ 	sb	$v0,0x10($s5)
 /*  f18dfc8:	0fc614f4 */ 	jal	func0f1853d0
 /*  f18dfcc:	02602025 */ 	or	$a0,$s3,$zero
diff --git a/src/include/game/game_176d70.h b/src/include/game/game_176d70.h
index c8a055063..a4a1697ec 100644
--- a/src/include/game/game_176d70.h
+++ b/src/include/game/game_176d70.h
@@ -79,13 +79,13 @@ u32 func0f17f260(void);
 u32 func0f17f428(void);
 u32 func0f17fa28(void);
 u32 func0f17fcb0(void);
-u32 scenarioBriefcaseCallback04(void);
+void scenarioBriefcaseCallback04(void);
 u32 func0f17ff8c(void);
-bool scenarioBriefcaseCallback08(void);
+s32 scenarioBriefcaseCallback08(void);
 u32 func0f17ffe4(void);
 u32 func0f180078(void);
 u32 func0f1800a8(void);
-u32 scenarioBriefcaseCallback0c(void);
+void scenarioBriefcaseCallback0c(void);
 u32 scenarioBriefcaseCallback10(void);
 u32 scenarioBriefcaseCallback14(void);
 u32 scenarioBriefcaseCallback18(void);
@@ -93,11 +93,11 @@ u32 scenarioBriefcaseCallback1c(void);
 u32 scenarioBriefcaseCallback20(void);
 u32 scenarioBriefcaseCallback24(void);
 u32 scenarioBriefcaseCallback28(void);
-u32 scenarioCaptureCallback04(void);
-u32 scenarioCaptureCallback08(void);
+void scenarioCaptureCallback04(void);
+s32 scenarioCaptureCallback08(void);
 void scenarioCaptureCallback10(void);
 void scenarioCaptureCallback14(void);
-u32 scenarioCaptureCallback0c(void);
+void scenarioCaptureCallback0c(void);
 u32 scenarioCaptureCallback1c(void);
 u32 scenarioCaptureCallback20(void);
 u32 scenarioCaptureCallback24(void);
@@ -109,8 +109,8 @@ u32 scenarioCaptureCallback34(void);
 u32 scenarioCaptureCallback38(void);
 u32 scenarioHillCallback40(void);
 u32 scenarioHillCallback44(void);
-u32 scenarioHillCallback04(void);
-u32 scenarioHillCallback0c(void);
+void scenarioHillCallback04(void);
+void scenarioHillCallback0c(void);
 u32 scenarioHillCallback10(void);
 u32 scenarioHillCallback18(void);
 u32 scenarioHillCallback1c(void);
@@ -118,12 +118,12 @@ u32 scenarioHillCallback20(void);
 u32 func0f182aac(void);
 u32 scenarioHillCallback34(void);
 u32 scenarioHillCallback38(void);
-u32 scenarioHackerCallback04(void);
-u32 scenarioHackerCallback08(void);
+void scenarioHackerCallback04(void);
+s32 scenarioHackerCallback08(void);
 u32 func0f182ba4(void);
 u32 func0f182bf4(void);
 u32 func0f182c98(void);
-u32 scenarioHackerCallback0c(void);
+void scenarioHackerCallback0c(void);
 u32 scenarioHackerCallback10(void);
 u32 scenarioHackerCallback14(void);
 u32 scenarioHackerCallback18(void);
@@ -132,8 +132,8 @@ u32 scenarioHackerCallback20(void);
 u32 scenarioHackerCallback24(void);
 u32 scenarioHackerCallback28(void);
 u32 func0f1843d4(void);
-u32 scenarioPopacapCallback04(void);
-u32 scenarioPopacapCallback0c(void);
+void scenarioPopacapCallback04(void);
+void scenarioPopacapCallback0c(void);
 u32 scenarioPopacapCallback28(void);
 u32 func0f1845bc(void);
 u32 func0f1847b8(void);
@@ -146,9 +146,9 @@ u32 func0f184fb0(void);
 u32 func0f18500c(void);
 u32 func0f1853d0(void);
 u32 func0f185428(void);
-u32 func0f185484(void);
-u32 func0f1854cc(void);
-u32 func0f185520(void);
+void scenarioCallback04(void);
+s32 scenarioCallback08(void);
+void scenarioCallback0c(void);
 u32 func0f185568(void);
 u32 func0f1856ac(void);
 u32 func0f185720(void);
diff --git a/src/include/types.h b/src/include/types.h
index 68bc45829..44446a815 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -4102,9 +4102,9 @@ struct mpsetup {
 
 struct mpscenario {
 	struct menu_dialog *optionsdialog;
-	void *unk04;
-	void *unk08;
-	void *unk0c;
+	void (*unk04)(void);
+	s32 (*unk08)(void);
+	void (*unk0c)(void);
 	void *unk10;
 	void *unk14;
 	void *unk18;