The last Assassin's Creed game set in Italy (revelations?) used a song called 'iron' by an Artist called Woodkid in it's main trailer. Someone has taken Woodkid's next single 'Run Boy Run' and cut a video together from the various cutscenes in all the various AC games. And, you have to say, he's done a ruddy good job.

http://www.youtube.com/watch?v=CPLHGuBhwN4