The game runs just fine in experamental, literally everything works (aside from the known voice recognition issues) except for when you get into a multi person game. With the SteamDeck=1 start up command you can hear players just fine and they can hear you (the current microphone input bar lights up). I am using Pulse Audio selection as microphone but selecting the microphone directly also works. The problem is when I got in a game, I could not hear other players (unless they were speaking through the walky talkie), and they could not hear me (neither pulse audio microphone or the direct microphone selection would be registered. I had the pulse audio application pulled up to verify the microphone was still working and the app was registering it meaning the microphone was working). The game still played just fine and when the round ended and we went back to the main lobby, I could hear the other players again and they could hear me again (and the microphone input registered as well). I have heard the opposite problem from people that you can not hear in the lobby but can in the actual game, but in my case I can only speak and hear in the lobby and not in the game/ maps. Other proton versions did not change the outcome.