tweaktools / tweakos / 0x05
Run Windows programs on TweakOS, with no Wine, no Proton and no third-party libraries.
TweakWin loads 64-bit Windows .exe files directly and provides the Windows API they call from its own code, written from Microsoft's published specifications.
Programs run inside prefixes: persistent Windows environments with their own C: drive, a saved registry and mapped drive letters. A prefix never touches the host.
Most Windows software still needs APIs TweakWin doesn't have yet, so tweakwin compat lists every missing import before you try.
$ tweakwin prefix create games $ tweakwin compat Program.exe $ tweakwin run --prefix games 'C:\Program Files\App\app.exe'
measured october 2026
| program | imports resolved | result |
|---|---|---|
| Caprica (Papyrus compiler) | 112 / 112 | compiles scripts; output verified |
| Skyrim SE (GOG) | 704 / 704 | loads and starts; D3D11 rendering in progress |
| NifSkope | 9215 / 9495 | stops at DNSAPI / OPENGL32 |
| Blender | ~88% | needs OpenGL and more USER32/GDI32 |
Every import resolving means the program loads. It doesn't promise every call behind those imports is complete.
tweakwin-gui, a launcher to browse, inspect and run .exe files