Diablo IV. I'm still somewhere around Act 2, and the game is really well done in its genre.
For when I'm tired of slaying demons, I got Back 4 Blood. Haven't been playing this one since its first release, and this time I really got hooked. Pretty good HDR implementation, and overall it's a worthwhile Left 4 Dead successor. I also got all the DLCs, so plenty of content before I run out.