Assassins Creed: Revelations. I borrowed it from my local library and I've actually never played any of the games. I have tested them a bit, but never really fully played them. So I completely lost in story and have no idea what has happened more than the minor exposition given at the start at the game. So pretty much all I know is that I a guy named Desmond that is a coma of sorts and must relive his ancestors memories for some reason or otherwise he'll become a vegetable or something and be stuck in computer limbo for ever.
But other than the confusing story (although I guess it not as confusing to people that have played all games) game play wise it is really good and fun, and the world it's set in beautiful and you get urge to explore it, which the game lets you do. So pretty darn good game all things considered.