Compatibility Report

• Name of the game with compatibility issues: Party Animals Demo
• Steam AppID of the game: 1301350

System Information

• GPU: RX 580
• Driver/LLVM version: Mesa 19.3.5
• Kernel version: 5.8.10
• Link to full system information report as Gist: https://gist.github.com/xeals/7f71cd3c71004918524177ce8bef37a3
• Proton version: 5.0-9

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.

steam-1301350.log

Note that the log was generated using WINEDEBUG=-seh as the game continually throws exceptions and the stack trace is printed for them, ballooning the size of the log to 20MB+.

Symptoms

The game initially loads but does not allow the user past the logo screens saying that it cannot connect to Steam. The game logs (located in the game data directory) show (ignoring all the exception stack traces):

10-13 08:26:35:469 [Error] [3] [1] [Steamworks.NET] SteamAPI_Init() failed. Refer to Valve's documentation or the comment above this line for more information.
10-13 08:26:35:471 [Error] [3] [1] SteamScript.Check: not initialized!
10-13 08:26:35:473 [Log] [3] [1] Steam should be open before starting game

Full log attached, and log without the stack traces.

Reproduction

Start the game.