Compatibility Report

• Name of the game with compatibility issues: Fall Guys
• Steam AppID of the game: 1097150

System Information

• GPU:
• Driver/LLVM version:
• Kernel version:
• Link to full system information report as Gist:
• Proton version: latest (5)

I confirm:

• [X] that I haven't found an existing compatibility report for this game. (No info on ProtonDB website)
• [X ] that I have checked whether there are updates for my system available.

Symptoms

Program starts as usal, with the menu etc. But as soon as you try to join a game, the game says "anit cheat not initialized" and don't go any further, rendering the game totally useless (I'm a bit furious here, I've paid for the game so it'd be the least to allow me to revert to the older version that was working fine).

Reproduction