If there is one game that is looking to not only be a sleeper hit but one of my more anticipated games of 2013, it would be Remember Me. I am digging the cyber-punk atmosphere and the general tone of the game. It looks like a comic book-ish version of Deus Ex, or a less serious Deus Ex.
The latest trailer shows off some free flow combat stuff as well as this big hulking dude who goes by the name Kid Xmas. I'm not really sure what his deal is, but he obviously wants to destroy the protagonist. But he gets his ass handed to him, so HA!