Valve fixes Baldur's Gate 3 issue on Steam Deck / SteamOS
c/steamdeck · u/Fubarberry@sopuli.xyz · 160 points
Basically Larian is working on a native Linux version of BG3, and that got accidentally set as the default even though it's not yet in a launchable state.
It's been corrected now, but you may have to restart your deck to get the fix.