Hello @EchoDuplication, we're using one issue report per unofficially supported game title, and this issue has already been assessed, please see https://github.com/ValveSoftware/Proton/issues/167#issuecomment-500039704.
Closing in favor of #167.
Issue fixed. Ran:
cd ~/.local/share/Steam/steamapps/common/Proton\ 4.2/dist/lib64
curl -O flibitijibibo.com/opexit.tar.bz2
tar xvfj opexit.tar.bz2
Compatibility Report
System Information
I confirm:
Symptoms
Shortly after opening the game (5-10 minutes), framerate and audio stuttering occurs. It can go all the way down to 20FPS, usually leveling out there and not degrading further. This issue has only happened after the latest Proton update and before that the game was working flawlessy with the suggested audio patch and xboxdrv to prevent crashes. Leaving the game open for some time (1hr+) just amplifies the problem and does not help.
Reproduction
Issue occurs both on my desktop and laptop, which have similar specs. Again, only happened after the latest in game patch.