Gregory's Server@necromantrix Steam Just Works™ for the most part. You'll install it from your distro's package collection, or from #Flathub if they don't have it. A lot of games support Linux natively; for the rest you can go to Manage > Properties > Compatibility > Force Steam Play compatibility to make it use Proton.
Try Heroic Games Launcher (available from Flathub) for GOG and Epic games. It will handle Wine automatically as needed.
@PurpleJillybeans @necromantrix I had a mixed experience with Heroic. Sometimes Lutris works better than Heroic, so maybe try it if some game doesn't work out of the box.