At first I couldn't get it to work. It kept freezing on startup. I restarted the computer and then used PROTON_USE_WINED3D=1 %command% as a launch parameter. It almost worked after that. It would output to the monitor but not the VR goggles. I then removed that launch parameter and it magically started working after that. It actually even runs better now than on Windows. On Windows, I couldn't get the rotate view controls to work but on here, that actually works.