Start with Steam’s supplied Proton, verify the game files and graphics path, and change one compatibility variable at a time.
Step-by-step checks
1. Confirm the scope
Test another native Linux game and another Proton game. One failing title points to game compatibility; every title failing points to Steam, drivers or the system.
2. Update through trusted channels
Install Linux Mint updates, restart, and use Driver Manager for supported proprietary drivers. Avoid copied terminal commands from unknown troubleshooting posts.
3. Verify the game
Use Steam Properties to verify installed files. Record the game App ID, storage location and exact error before changing Proton.
4. Return to a known Proton version
Remove custom launch options and test the Steam-selected default, then the current stable Proton. Experimental versions can help but may also introduce regressions.
5. Preserve saves and logs
Confirm whether saves are local or cloud-synchronised before deleting a compatibility prefix. Generate a Proton log only when needed and remove it after diagnosis.
When to stop
Stop before deleting compatdata, changing partitions, replacing drivers outside Driver Manager, or entering administrative commands you do not understand.
What to tell an expert
Share the device model, operating system, exact symptom or error, when it began, what changed beforehand, and which checks you completed. Do not send passwords, one-time codes, encryption recovery keys, or unnecessary personal files.
Official reference
This Supportia guide was prepared with current official guidance as a factual baseline. Interface names can still vary by device and version. Open the official reference.
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