I was going to say replaying but I feel like that limits the question to games like Prey or Fallout New Vegas that have endings and games like The Sims 2 or Cities Skylines where you can play indefinitely end up excluded.
I’m not really referring to games like League of Legends where you’re coming back every month. More so games where you stop playing for an extended period of time.
Every Miyazaki Fromsoft game ever.
I have no idea how I’m not bored yet. They’re all just so damn satisfying to play. I went from mostly online FPS to these games after I got Prepare to Die Edition back in the day. Any given time I play a game now, there’s an 80% chance it’s one of these or something similar to them (like The Surge, Mortal Shell, Lies of P, etc).