Games

I can't recommend Disgaea enough. 5 was the one that I played and I feel like has the right balance of nearly infinite grinding vs interesting content vs reason to actually grind, with also having a relatively achievable and observable ending. All the games follow the same basic gameplay premise so pick the one you like, I think D2 has a lot of old school fans and 6 was poorly received. Disgaea 5 as far as I know is the fan favorite "modern" Disgaea game.

It even has a demo if I recall so you can try it before committing to it. Just know that the demo can only go into the very basic gameplay loop because an awful lot of things are locked behind the first 10 or so hours of story gameplay. But if you like the loop (and the general gist of how the gameplay works, that will remain) then it's totally worth it. It's a game that one could easily sink 2,000+ hours into if it catches their fancy. It's also a game that's easy to pick up and put down because they're always some bit of something that you can do. An hour spent anywhere doing anything will get you a bit of an upgrade, and you just pick the things you like and craft them into the most obscenely overpowered bullshit you could ever conceive of. Stat points regularly reach into the quadrillions. By endgame you're expected to have spells that destroy the entire battlefield being spammed multiple times per turn. It's loads of fun.