Okay then. First off, an honourable mention to Red Dead Redemption, which contained many wonderful moments and one of the greatest, most perfect endings to a game ever but which, overall, suffered from too much sprawl and could have been done with being a lot tighter.
3rd Place - Vanquish
An old fashioned score attack challenge dressed up in the garb of a western gaming Space Marine shooter as imagined and designed by an utterly derranged Japanese man with father issues. It's like he just sat down and digested a decade of gruff American guys with big guns and bigger shoulder pads and shat out 6 hours of sheer mayhem, molded and sculpted into something resembling his own understanding of what a video game really should be. Pure, glorious and supertight action all the way married to some of the most glorious and ridiculously over the top cinema sequences in a game to date. It's the Airplane to Gears of War and Halo's Airport and I love it for it.
2nd Place - Mass Effect 2
My Commander Shepard is my favourite character in a game ever. She takes no shit, gives no fucks and has a knack for pissing off anyone and everyone. She's also a complete softie when you get down to it but shhhhh. In gameplay terms, this was an incredible improvement on its predecessor. Far from being dumbed down, the streamlining served to cut a whole load of superfluous crap only spergelords would cry about ("waaaaah, I want everything to drop a +1 shotgun upgrade and 60 armour sets so terrible I'd never consider using, waaaaah"), the wide range of new characters and their stories served to give it a great little TV series feel, the returning guys were like old pals (Wrex! Garrus! *brofists*) and the visuals, music and voice acting (Mordin's especially) were absolutely stellar. Which makes it a pity that the main thrust of the narrative was so relatively weak compared to the first game. Even so, the pluses far outweigh the minuses and the DLC started good and only got better from there. And the ridiculously smug smirk Shep made as she walked away from her boss at the end never gets old.
1st Place - Alpha Protocol
Mike Thorton. Spy. Asshole. Iceburn dispenser. In terms of gameplay and graphics, calling it 'rough' would be generous, though its perks system and the way it rewarded the player in different ways depending on their actions, no matter if they won favour or lost it. In terms of writing, the display of choices and consequences thereof, it's incredible and that's why it's my number 1 in a year full of great releases, combining drama, tragedy and the blackest comedy. Even now, I'm reading the tales of other people's playthrough and they're nothing like mine, with allegiances changing, different people showing up all over, bosses I never even met. Plus, best of all, the man, the myth, the legend that is Steven Heck. Is he the Greatest Spy in the World? Is he a psychotically dangerous wannabe? The truth lies somewhere in between but what's indisputable is that he's your Alpha Superbro and no game ever had a better guy to stand by your side while you wreck agencies, governments and corporations. Ask him for a distraction and he'll show up on a Tube train. With a minigun. Ask him for help with a Russian mob boss and he'll sell him a shitload of bad coke. Steven Heck is the Main Man. Just don't ever call him Steve.