Besides HL3. (Sure; it's nostalgic, but... come on)
Personally, I cannot wait for the remake of Pokemon: Black & White! In 3D and - after ORAS - the crazy expanded plot. Oh man, it's gonna be real! Too bad it's probably not gonna happen until at least 2018. I CAN'T WAIT THAT LONG!!! *Cries* (Well, at least I've survived five years so far, so I can probably survive another three... hopefully)
The characters, the setting, the 'mons, the classic story... the MUSIC! Just imagine; famous pieces like N's castle but reorchestrated, just as Game Freak did with ORAS:
What game are you anticipating to be released?