Top games I've played this year that were released in 08.
Mirror's Edge - (just beautiful, free flowing, biggest flaw is the lame, cliched story)
LittleBigPlanet - (super cute, addictive, played through the whole story mode with my lady friend, first game we've done that with, played lots of online games with my friends)
Gears of War 2 - (easily beats out the first one in terms of intensity, i was surprised, everything about it was thrilling, only played co-op)
Patapon - (reason i still hang on to my psp, can't wait for part 2)
Pixeljunk Eden - (very original, slick visuals, great music)
Fallout 3 - (just started my adventure on this but wow, was not expecting this having never played oblivion)
Crash Commando - (surprise PSN game of the year, extremely fun online)
Worst game I played this year:
Haze - (but that was expected)
If I'm missing something, I probably haven't played enough of it, or at all to make an opinion.
Or I just can't recall that it came out in 08, I'm bad at remembering that stuff.
EDIT:
Braid - (how could I forget?!, one of the finest puzzle games ever, didn't care too much for the story but the ending was clever)