Borderlands 2, thanks to boss farming. Not recommended, but the play itself isn't terrible. Also this is the funny one.
Terraria Strongly recommended. My very first survival / base builder, which is what I primarily play.
Deep Rock Galactic Also recommended, a four-player dwarf-sim + mining + shooting with tons of procedural to keep it interesting. There are a few (mostly pretty) vanity DLCs which I got just to throw money at the devs. This is my staple.