Compatibility Report

• Name of the game with compatibility issues: Warhammer 40,000: Dawn of War II - Retribution
• Steam AppID of the game: 56400

System Information

• GPU: GeForce GTX 1070
• Driver/LLVM version: 4.6.0 NVIDIA 430.09
• Kernel version: 4.15.0-48-generic
• Link to full system information report as Gist: https://gist.github.com/Ohmu93/0cd21a887b1923eecd5ece1293d90d95
• Proton version: 4.2-3

I confirm:

• [x] that I haven't found an existing compatibility report for this game.
• [X] that I have checked whether there are updates for my system available.

Log:
steam-56400.log

Symptoms

Playing the multiplayer game always leads to a synchronization error of some sort, failing and stopping the match for everybody in the session with a following message: "You have been defeated". Takes at most 5 minutes for this to happen.

Reproduction

• Launch the game
• Join any MP game
• Play
• Observe a "You have been defeated" message within 5 min