Very accurate comment, and to expand on this, things like media codecs, windows dependencies, etc also cause problems. Luckily Proton can play just about any game on Steam.

For example, Marvel Rivals is a new game that just came out and its anti-cheat works with Linux. I play it with ProtonGE, which installs extra codecs that regular proton versions don’t include and it works awesome.

Check out protondb.com to search what specific games work for others on linux.

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Been a fan of Kacey Musgraves’ christmas show & album