WiiCompiled

A native PC port of Mario Kart Wii, made with static recompilation.

There's no emulator in the loop, no interpreter, no JIT, no PowerPC anywhere at runtime.

Important

There is no Nintendo code, no assets and no game data anywhere in this project or its releases. You need your own legally dumped copy of the PAL version of the game. Setup only ships the toolchain, the translation runs on your machine against your disc image, and nothing ever gets uploaded.

What is a github, I just want to play

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What it does

Unlocked framerate with interpolation. The original game is hard-locked to 60 fps. The runtime can generate interpolated frames in between, so on a 120/144 Hz monitor things genuinely look smoother.

Warning

Interpolation is experimental right now and will show artifacts in specific scenarios.

Any aspect ratio you want. Drag the window bigger, wider, whatever, the camera adjusts live.

Native rendering via aurora. The graphics layer is built on aurora. Aurora is a source-level GameCube & Wii compatibility layer.

High internal resolution. Play at several times the console's resolution.

Music ducking. Start playing something else, Spotify, a YouTube video, and the game automatically mutes its own music until the other audio stops. Optional, if you'd rather it didn't. All audio that shows in your display media controls on your windows pc fall under this.

An in-game settings bar. Press F10 while the game window has focus:

• Internal resolution
• FPS counter
• Controller assignment for all four ports
• Full per-controller button mapping
• Volume, instant mute, and the music ducking toggle

Everything you change is saved to Config.toml on the spot and restored next launch.

Real controller support. Controllers are fed to the game as a GameCube controller. The port does NOT pretend to be a Wii Remote or Classic Controller. Mappings are positional (south, east, west, north) rather than Xbox-labelled, so the same config makes sense on Xbox, PlayStation, Nintendo and generic SDL pads alike, and extra inputs like paddles, touchpads and share buttons show up when the hardware reports them.

Requirements

• Windows 10 or 11, 64-bit
• GPU: GTX 1650 / RX 6400 / Arc A310 or higher
• CPU: Intel Core i5-8400 / AMD Ryzen 5 2600 (4c/6c, ~3.5GHz+) or higher
• About 20 GB of free disk space during installation
• A clean, unmodified PAL RMCP01 disc image of Mario Kart Wii, dumped by you. ISO, GCM, GCZ, CISO, WBFS, WIA and RVZ are accepted.

Note

GPU/CPU minimums are set by driver support and D3D12/Vulkan feature requirements, not by the game's actual demands.

Only the clean PAL revision will work. Anything else (other regions, patched executables) is rejected outright.

Note

Nobody here will tell you where to get the game. Dumping your own disc is on you, and links to game files won't be provided or tolerated.

Installing

For an easy experience, use Wheel Wizard. Pick your clean PAL RMCP01 image under Settings, turn on WiiCompiled (beta), and hit install from the Home page. Wheel Wizard downloads the setup tool from this repo and walks you through install, updates and launching. The backend itself is deliberately command-line only, Wheel Wizard is a wrapper around it.

Caution

Only take builds from this repository's Releases page. If someone's sharing an installer through Discord or some random download site, don't touch it!!

A note on related projects

WiiCompiled, Wheel Wizard, Retro rewind and other related projects are developed independently and each has its own contribution rules and all have their own rules. What applies here does not automatically apply there, and vice versa. Check each project's own CONTRIBUTING and README files.

Retro Rewind

Retro Rewind, ZPL's Mario Kart Wii mod distribution, can be built as its own static profile: instead of applying Code.pul as runtime patches, the Kamek/Pulsar code is statically translated together with the base game into a separate native executable.

Wheel Wizard drives this too.

Building from source

Owning the game is still required even if you compile everything yourself.

You'll need: .NET 8 SDK, CMake, Ninja, and LLVM/Clang (the shipped build uses LLVM-MinGW targeting x86-64-v3).

Build the translator:

dotnet build translator/Translator.sln -c Release

The default test suite needs no binaries and no host C++ compiler, so you can hack on the translator without any game data around.

For everything beyond that, feeding in your own main.dol/StaticR.rel, running the translation, generating the manifest and build graph, and compiling. see translator/README.md.

FAQ

Is this an emulator? No. Everything is compiled to native code before you ever press play. At runtime there's nothing emulating a Wii CPU or GPU.

Do you provide the game? No. Don't ask. Nothing in this repo or any release contains Nintendo code or assets.

Why does setup take so long? Because we don't ship the translated binary, most other recomp projects do, but we don't want to risk it right now, setup has to run a static recompiler over the whole game and then throw a C++ compiler at the result. It's a one-time cost on your machine.

Which game version works? Clean PAL RMCP01. Other regions and modified executables are rejected. Translating them against the wrong manifest would give you a subtly broken game that's miserable to debug for us.

Can I recompile other GameCube/Wii games with it? The translator itself handles DOLs and RELs generically, see projects/examples/generic-dol.yml. The catch is that a playable port also needs a runtime: audio, input, GX, everything the game touches.

The game crashed / stopped with an error. Errors are deliberately loud instead of quietly swallowed. Send a report along with the run log from %LOCALAPPDATA%\WiiCompiled\Logs.

Will you fix original bugs? Not in the base game, behavior identical to real hardware is the goal. Only report things where this port differs from the original game. As for Retro Rewind, some base-game behavior is patched, so if it differs from the base game, that's normal. If Retro Rewind behavior differs between Dolphin/Wii and WiiCompiled, open an issue on GitHub.

How accurate are the physics? 100% - this is proven by in-game ghosts. Since ghosts are replay files based on inputs rather than tracked positions, matching ghosts prove the physics match across Dolphin/Wii/WiiCompiled.

Is it done? Not fully. The game is in a state where everything should be playable and the physics do match 100% with the original game, but compatibility, rendering, networking and performance are all actively being worked on. If you do find an issue, we strongly encourage you to open one on GitHub so we can take a look at it.

AI usage

AI coding tools were used during development of this project. All translated output is verified against real hardware behavior and most importantly, physics accuracy is proven synced across Wii, Dolphin, and WiiCompiled (see FAQ).

Credits

• aurora - the GX rendering/windowing backend this project's whole graphics layer sits on. MIT licensed.
• Dawn - Google's WebGPU implementation, powering aurora's Direct3D, Vulkan and OpenGL backends.
• Dolphin Emulator - an invaluable reference for Wii hardware behavior during development, plus the source of the free DSP coefficient ROM and the unmodified default WiiConnect24 bootstrap tree bundled with the runtime.
• Retro Rewind by ZPL and team - the mod distribution this project supports.
• Wheel Wizard - the mod manager this project integrates with as a launch backend.
• Everyone in the static recompilation community.

Bundled third-party components and their licenses live in THIRD-PARTY-NOTICES.md.

License

WiiCompiled is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License, version 3 as published by the Free Software Foundation.

WiiCompiled is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Any mkwii distribution making use of WiiCompiled must be licensed under GPL v3.0.

Not affiliated with, endorsed by, or associated with Nintendo. Mario Kart Wii is a trademark of Nintendo. No Nintendo intellectual property is contained in, distributed with, or obtainable through this project.