Just Cause 3 works on my desktop
Don’t think it works with any Proton on the Steam Deck. Just tried on my desktop, and it works fine, pretty sure it used the latest Proton version as well. It’s using Steam Tinker Launch, so no I can’t look in Steam what version it used.
What’s wrong with SteamOS that killed Just Cause 3? That would be a fun game to play on it, since I can’t play on the TV with sound. Not unless I want to do a workaround for the sound. Not worth it. I don’t think Valve is ever going to fix the bug.