Fun football management sim, pretty much runs on every computer in existence. Very niche but very fun and in depth if you're into that sorta thing.

I can run this game on my laptop. It's also fun and I made a nice character in it.

It's free! It's a smash clone that is still fun without spending any money and can run on pretty basic set ups.

Garry's Mod can run on most things these days, depending on what game type you're playing. Very many ways to have fun with it.

Very fun puzzle-type game with a relationship-building aspect. The graphics are kind of weird honestly but the story and dice-driven gameplay is fun.