Here's an up to date look at the current state of the most played games on Steam, and how many of they run on Steam Deck and Linux as a whole.
It's worth noting that the top 100 games do contain a lot of popular multiplayer games, and multiplayer games are less likely to work on Steam Deck/Linux due to anticheat issues. So games outside of the top 100 will generally have a higher compatibility rate. For comparison, only about 5% of the top 1000 games are broken on Linux according to Protondb
Almost all the non working games are due to anti cheat or are online only games. Two aren't anti cheat, but also aren't games. In other words there's only like 3 games that are single player that don't work.
Installing windows is lame and ruins the console like experience that helps make deck popular. Also, the anti cheat won't be solved until Linux anti cheat is used by the games and no sooner. That won't happen until a lot more people are on Linux.
In case you missed it: the Steam Deck recently crossed over 13,000 games rated at least Playable.
Checking via the Steam Deck Verified rating (either Verified or Playable), and then the ProtonDB rating across Platinum - Gold - Silver - Bronze or Broken / Linux Native Support for desktop Linux.
From top to bottom based on peak player count, here's how things stack up with this snapshot of Steam's most played taken on January 5th - 2024, 18:45 UTC.
Overall we're seeing 75/100 at least rated Playable on Steam Deck and 78/100 work on desktop Linux with a Gold rating on ProtonDB or higher (or the game has official Native Linux support).
At least 12 of the Unsupported games are due to anti-cheat issues, although some like SMITE do need a re-check from Valve.
Anti-Cheat continues to be a major source of annoyance for Steam Deck / Linux gamers overall.
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