Comment by unethical_ban

In short, it is the default assumption that a game will play on Linux these days, vs. assuming it won't.

Steam/Valve has built Proton, which I believe is a fork of Wine, and put significant resources into it. Steam distributes it on its own but CachyOS distributes even more patched/optimized versions of it in their repositories.

The games I know do NOT work on Linux are usually online multiplayer competitive games which have kernel-level anti-cheat. Notable for me is Fortnite - though I hear that now, there are even options for enabling strong anti-cheat in Linux but Epic chooses not to support it.

I'm not informed on other niche game types like simulators or games requiring special equipment, but chances are if it's not competitive, or it's single player, you can get it running with good performance on Linux with modern hardware.