Decaf is an open-source Wii U emulator for Windows and Linux. It is known to be the very first Wii U emulator ever released. It's currently in the early stages of development but can successfully boot several commercial games, albeit slowly with many glitches.
Decaf received some major updates in late 2018 / Early 2019. A Vulkan renderer and a qt interface have been implemented. A Discord server has been started which allows better communication between developers working almost exclusively on decaf and developers from other emulation projects. A lot of games are now working and reaching playable speeds as well as correct graphics.
Like Cemu, Decaf has high system requirements.
- OS: Windows or Linux, 64-bit
- GPU: OpenGL 4.5+ or Vulkan 126.96.36.199+
This emulator doesn't clean up allocations for textures and shaders, which can cause some issues (stuttering, crashes) after around a couple of hours. One possible solution right now is to periodically close the emulator.