Copying my comment from another thread:

Check out https://www.protondb.com, to see which games work well on Linux. Games that are platinum should work out of the box, ones that are Gold might need some tinkering. Most games work great, but a lot of multiplayer games aren’t supported.

In general gaming on Linux has been a pretty smooth experience lately. Games on Steam usually just work, but IMO running games outside of Steam is pretty hit or miss. They sometimes need following a guide or trying to fix an obscure issue that only like 2 other people have.

So yeah, most games do just work that you don’t have to worry about it too much.