

Crashes a few seconds after loading the penthouse, looking at the logs my best guess EAC kicks you out

Crashes a few seconds after loading in
Likely EAC issue

Crashes in lobby after few seconds
Tried few other proton versions, some launch options, still crashes.

May not lauch sometimes
so it looks like they allowed the anticheat to let linux users in!
Settings: all High with a consistant 60 fps

Unplayable
Registration/login screens are accessible. Everything past that is not. The game just hangs.
You can get as far as your penthouse but within a few seconds the game will either send you back to desktop or give you a black screen.
No longer works. Exits to desktop shortly after loading lobby

VOIP now works! NonVR update coming soon for this. Played the beta for it on steam deck. Also works!

Since social interaction is a big part of this game, the lack of VOIP makes it not enjoyable.
Incoming VOIP does not work. Although the own avatar moves its mouth when there is microphone input no other player can be heard. There is not even the speaking icon above their heads, but there is mouth movement. Not sure if others can hear me.
Crashes to Unity error reporter when using SteamVR linux_v1.14 beta. Does not cleanly exit when not using SteamVR beta.
SteamVR is significantly laggy and underperforming when not using linux_v1.14 beta. Other VR games work fine in the linux_v1.14 beta version but Pokerstars VR does not. It requires switching between SteamVR versions when playing Pokerstars VR as for the regular VR experience I would like to use linux_v1.14 beta for better performance.

It works, but no VOIP kind of kills the mood and troubleshooting woes can make it more difficult to play than Windows.
VOIP does not work at all. No inbound or outbound audio.
Sometimes the game just doesn't respond to your controllers and the headset orbits around some strange axis. You'll need to swap around the various Proton versions and reboot SteamVR a couple of times to get it working.
Occasionally selecting an option in the graphical menu will cause stuttering. If your hardware should support the setting, simply deselect it and select it again.
If the game crashes randomly, downgrade to Proton 4.2 and upgrade in increments, each time launching the game with the given Proton version, turning it up, and restarting. Proton versions higher than 5.0-9 seem to invariably crash the game.

Good except for in-game VOIP.
Game audio was fine, but I couldn't hear any of the other players and they couldn't hear me. I'm guessing the in-game VOIP service isn't initializing with Proton.

No issues whatsoever except maybe for a bit of reprojection, but you hardly notice it due to the slow nature of the game. Everything seems to work.