@onion108 It turns out this is a regression. You can manually set the game to use Proton 9 to avoid this failure while we work to fix it :) You can set the proton version for a specific game in the game Properties -> Compatibility in Steam.
Nothing extracted yet.
Compatibility Report
System Information
I confirm:
steam-1512940.log
Symptoms
Crash after splash screen and the "Unity" icon.
Reproduction
Enable proton for Melody V and run.