I am already playing Uncharted: Drake's Fortune from the beginning for the trophies. I hadn't exactly beaten it yet in the first place but that still counts as replaying I guess. I will do that with every other game I own as well because I think Achievements and Trophies are one of the best inventions in games yet. It turns the act of playing games into one big game, where you're constantly on a Quest to earn the next reward, and the best part is you get to show everybody what you've done.