The Black Hack is my new favorite rpg. It’s really simple, if you know how to play DND it takes only 10 minutes to learn (if you don’t know how to play i think it would still be simple). It moves away from the war-gamey aspects of modern ttrpgs, instead combat is designed to be as simple as possible. Basically, you describe what your character does, the dm tells you what stat to roll, and you roll 1 die to see if it works. You spend way more time expressing your character, and way less time looking at your character sheet.