Cities XXL (313010)

Compatibility Report

• Name of the game with compatibility issues: Cities XXL
• Steam AppID of the game: 313010

System Information

• GPU: GTX 970
• Driver/LLVM version: 460.91.03
• Kernel version: Linux 5.13.0-27-generic
• Proton version: All, specifically 6.3

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.

I have attached the logs.

Symptoms

The game seems to crash as soon as it tries to render a 3D object. This happens when the game renders the planet, when you start a new game.

This has been a long standing issue and the game has been marked as "borked" on ProtonDB since the beginning.

Reproduction

Install and try to start a new game. The game will crash when it's supposed to show the planet.

steam-313010.log
CitiesXXL_d3d11.log
CitiesXXL_dxgi.log

Reproduce the crash by starting a new game in Cities XXL under Proton, then inspect steam-313010.log, CitiesXXL_d3d11.log, and CitiesXXL_dxgi.log for the failure during planet rendering. Done means the game reaches the planet and continues without crashing; the report does not identify a source file or existing test.