Dwarf Fortress. It’s actually super relaxing when your fort is running smoothly, managing work orders, building, decorating, mining.

I have 1246 games on my 19 year old Steam account, and 100 of those installed on my Steam Deck. I don’t worry about playing all of my games, but I enjoy always having something I want to play, whatever that might be. It helps me resist impulse purchases of new releases; I usually wait for a decent discount or a bundle.