


Xbox Profile login dont work and cutscenes only display audio. change to proton experiemental
The game itself works perfectly but cutscenes between stages are missing. Some tinkering is needed if you want them.
Cutscenes don't work out of the box. I had to use GE-Proton 7-33 and install Media Foundation codecs via mf-install script to get cutscenes working properly.
Funnily enough, Steam tries to download transcoded cutscenes from Valve's server while you install the game. Unfortunately it downloads only the first two of them. These two videos work properly only on Proton 6.3-8 but not on 7.0-4 or Experimental. The rest of cutscenes are never downloaded for some unknown reasons. They are always displayed as TV color bars. So tinkering with GE-Proton and mf-install seems to be needed atm.
Also beware that the game is quite VRAM hungry. 4Gb graphics card is not enough on Linux. The game was almost unplayable on my old 1050 Ti (dropped below 20 fps). You will likely need a 8Gb graphics card or more.
Cut scene visuals do not work on proton 7.0-2 or Experimental. They work on previous proton 6.3-8.
Cutscenes were audibly playing but visually distorted.

Make sure to use Valve's latest Proton version. Game hangs at black screen using Proton-6.18-GE-2. Started working properly after switching to Proton 6.3-7.
Works great out of the box, but consider couch coop instead of Steam Remote Play.
Likely not Proton related, but COOP split-screen via Steam Remote Play tanks frame rate hard (low 30-40s fps down from 60-80).
Runs great out of the box. No tinkering needed!
no issue (some vertical sync but it's original game)

Runs well. No tweaking.
Game goes to a black screen when continuing onto next stage but manually selecting the stage from the menu works - not a Linux/Proton specific bug (also affects Windows)