1 point
Linux is still only compatible with 10000 games on Steams 70000 games store.
Windows is compatible with all of em.
1 point
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It’s 12,000 and those are rated as “playable”. The majority of games on Steam would be playable out of the box, but Valve is being cautious with their verified program.
ProtonDB has over 18,000 user submissions for playable games.
There are many games in my library that aren’t listed as Steam Deck verified or even on ProtonDB and they just work.