I use POP!_OS. Works pretty much perfectly for me, although they just came out with a new cosmic desktop which I am not using (but looking into), so you might have a different experience than me. I have some issues like FPS in deadlock slowly degrading (I think if I use steam overlay) or sometimes games with third party launchers (like Mass Effect) just wouldn't work until I tinkered around. These aren't dealbreakers for me though. Most games work out of the box for me. If you're really worried, you can always dual boot it with windows just to be safe, that's what I did. https://ostechnix.com/dual-boot-windows-and-pop-os/ here is the guide I followed. If you don't want Pop OS, I've heard decent things of bazzite as well for gaming.