Hello @RyougaLolakie, 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/7864#issuecomment-3318737702.
proton experimentalx1 2025-09
Compatibility Report
System Information
I confirm:
steam-1794960.log
Symptoms
Sonic Origins used to run fine on Proton Experimental since Friday evening. As of Saturday, after system update and or Proton Experimental update, Sonic Origins exits without error right after the Sega logo. Tried clicking again, steam says launching then nothing happens. It doesn't happen to most games I played under proton epxerimental (espeically recently played Dragon Quest XI) I made a reproduction to this underneath, but I just want to know if this is a regression or is it something on my end?
Reproduction
I switched to Proton version 9.0-4, the game launches just fine. Switched back to Proton Experimental, same crash without error/game unable to launch.