UnknownUnknown
A line is visible when the camera is near geometry.
Weird horizontal black lines near some walls
Weird horizontal lines that appeared only in fullscreen at 4k (that move from the bottom to the top and become diagonal at the top)
Major slowdown (low fps, big lagspikes, weirdly underutilizing the gpu)
I didn't spend much time playing the game (barely 20 minutes) but because of the previous old reports that said it totally didn't launch i was willing to try it out and now it does seem to launch.
Game has a Native Build, which doens't launch, using Proton gets you into a black screen, instantly crashing
Summary is pretty much all there is, game does not start using the Native build, and using Proton (tried Experimental, Experimental bleeding, 7.0-1 and 6.3-8) will get you into a black screen for a second, then instantly crashing.
Doesn't start under proton. Shows a black screen, then exits.
It might not seem useful to have it running under proton if there is a native version, but there are reasons for wanting it that way. My own reason is that the Linux version is not VR capable while the windows version is. Also, it might use libraries that other games without a native version need to run under wine, so since it is free, it is easy to test it. I opened a bug report in Valve's bugtracker: https://github.com/ValveSoftware/Proton/issues/5106
