Witcher 3. I think I have about 11 full play-throughs and I am always finding something new or some new area I've never been too. I loved the original Red Dead Redemption too, played it just as much as Witcher 3 if not more. I'm kind of pissed that Rockstar has never ported this game to PC and that its upcoming sequel isn't ported to PC either. Which is sad because I dont own a console.
Watch out for evil Terra-Tron; He Does not like you!