Hello @schwigi, 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/4326#issuecomment-1336171092.
proton 7.0-4x1 2022-12proton experimentalx1 2022-12proton nextx1 2022-12
Symptoms
With the latest release of Proton Experimental (2022-12-01) the Game Launcher does not show up on screen. The process is running though and not crashing.
Reproduce
Run the game with Proton Experimental (2022-12-01) on the Steam Deck. This happens on my Desktop PC as well.
Used Hardware
steam-1286830.log
Additional Note
The reasons for running Proton Experimental at all, are graphic error on the Steam Deck when using Proton 7.0-4 or Proton Next 7.0-5 during the cut scenes.