At that time my favorite from what I actually played then were:
Halo 3 MP- I didn't own an XB1, but my friends and I played a LOT of Split Screen back in the day. I still think this is the best MP ever made.
What I played later on:
Ninja Gaiden Sigma- I really enjoyed this, it was pretty brutal.
Crysis- Played only a few years ago. I actually started with 2, which I really enjoyed, but this one was mind blowing. Don't care about what people say toward the end, it felt like 2 AMAZING games in one.
Motorstorm- Fantastic racer with Smooth controls and great cinematics. Love the chaos and destruction while racing and trying to stay alive.
What I shamefully still need to play:
Mario galaxy- supposed to be one of the best Wii games, I have a Wii U and have beaten 3d World, so it's a head scratcher why I haven't played it yet, I wish I knew.