I’ve gotten Linux to work with all games I care about.
Oldschool Runescape, fully supported natively unless you have a Jagex account, then you need to download a stupid launcher that is windows only, but it works fine, through Lutris.
Other than that, I’ve gotten RDR2, GTA5, Witcher 3, Elden Ring, and more to work. Never had an issue with stuff not working. Definitely more work to set things up the first time, though