Call of Duty: Black Ops II
There are plenty of legitimate criticisms and negative opinions that can be leveled at the Call of Duty franchise, but for my entertainment there is still no other series making this kind of game with this kind of quality. The fluid shooting mechanics are my favorite in gaming, it's one of the best-looking console games this year, it's super polished, and it's a fun ride.
The campaign adds a few new twists with player choice, and they mostly work (though I did end up passing on the boring side missions.) Multiplayer is more of the same, and this is a good thing in my books. I don't get sucked into much multiplayer, but Call of Duty has always been able to pull me in. This hasn't changed with this year's entry.
I'll be super curious to see what comes from this franchise next year, but for now, Call of Duty: Black Ops II has convinced me that this series is still worth paying attention to.