If you have a GPU that supports Vulkan these days, and you play games on Steam, it is very likely that you will be able to play games even without native Linux support. I check before I purchase any games, but it has become very unusual when I encounter a Steam game that I cannot play.
Gold or better generally just work. The current ratings for the top 1000 games:
Top Thousand Unrated:61 Borked:6% Bronze+:64% Silver+:59% Gold+:49% Platinum:19% Native:25%