PC
Winner: Empire: Total War - strategy on a grand scale, with possibly the best setting (mmm, guns!). Creative Assembly have finally patched it to a working, non-crashing level and I love it. Napoleon: Total War may one-up it (frankly, I want Rifles earlier in the game), but this year Empire has been the outstanding release.
Runner Up: Tales of Monkey Island
PlayStation 3
Winner: Call of Duty: Modern Warfare 2 - rather enjoyed it, although it isn't exactly long. Great story telling and a fine example of gaming as a vehicle for emotive responses.
Runner Up: Borderlands, Arkham Asylum
NB: Uncharted 2 and Assassins Creed II are under the tree...
360
Winner: Left 4 Dead 2. Mmm, zombies. Slightly unbalanced with the melee weapons, but still fun with friends. Good to see some changes from L4D and a less linear route through the maps.
Runner Up: The Secret of Monkey Island SE
Wii
Winner: New Super Mario Bros - yet another rehash, but it works. Like the 360 another year of dross from Nintendo really. Don't know why I have a Wii any more, apart from the odd bit of Virtual Console.
PSP
Winner: Final Fantasy VII - yes okay, it's a PSone port, but damnit, the best port in the world (well, except for a shiny PS3 one...)
Runner Up: LocoRoco 2, FF Tactics
DS Lite
Winner: Errr, didn't buy any DS games this year. Shame on you Nintendo.