This is the one and only issue I experienced in playing DuckTales: Remastered on Linux. Everything else has been perfectly functional, no bugs, 100% just "click and play".
Hello @drcouzelis, 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/597#issuecomment-450728446.
Compatibility Report
System Information
I confirm:
steam-237630.log
steam-bash.log
Symptoms
Upon beating the final boss (Dracula Duck) and escaping from the volcano, the final cutscene will begin (Scrooge McDuck escaping in a helicopter). After a few seconds, the game will close.
Reproduction
I have experienced this crash 3 out of 3 times when completing the game and attempting to view the final cutscene.