28. Assassins Creed II (PS3, also on 360 & PC)
The first game was a bit boring and repetitive although it had potential with some solid platforming mechanics inherited from the Prince of Persia series.. The sequel completely changed that with not only a massive playable world but with interesting quests and just generally filling the game with some superb content. Not only that though, they added an intriguing character in Ezio that helped bring the player into an involving plot of politics, backstabbing and conspiracy. None of the sequels have come close to matching the magic of AC2, although I haven't played Black Flag yet, so who knows if another AC game can make the list next year?