Hello @dhalucario, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/380#issuecomment-887790458.
Thank you, I wasn't sure if a new issue was appropriate since its a different issue than listed.
Compatibility Report
System Information
I confirm:
steam-71340.log.gz
Symptoms
The game seems to launch but gets stuck at "Game files either missing or corrupt please reinstall"

The issue persists even after verifying the game files and running the ConfigurationTool.exe in the games folder.
We tried deleting the config files too.
Reproduction
Run the latest Fedora 34
Install steam from RPMFusion
Install the game on steam: https://store.steampowered.com/app/71340/Sonic_Generations_Collection/
Run it from steam