With proton 4.2-3 is working nice and it can be played from start to finish, maybe with some frame drops here and there. Level 3, 4 and 5 do not load correctly when you come from the previous level, having to restart the...
I can confirm this to be working flawlessly, I had to use `PROTON_USE_WINED3D11` to fix some of the visual artifacts, but that's just me running this on 390.x nvidia drivers.