Hello @prnvp23, 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/6631#issuecomment-1748751844.
Understood, I wasn't sure as that post is from Mar 21 and for me and seemingly many other users on Steam Deck this issue only happened recently with the TI Compendium update.
Also I do not understand how is Dota 2 Unofficially supported? Is it not a Valve game and it has also been marked as Playable on Deck. Sorry if this is an obvious question I'm new here and to Github in general and don't know where to look for answers
Compatibility Report
System Information
I confirm:
steam-570.log
Symptoms
Game won't launch on multiple versions of Proton, it just says Running for a while and then the button turns back into Play with no error messages, no screen turning black like the game launch even began, nothing. The native linux version works when Steam Play is turned off or Steam Linux Runtime 1.0 (scout) is selected instead of Proton
Reproduction