I was shocked that there was no thread for this game already. I myself think that this was the best new game of 2007. But now here is the thread so feel free to discuss.
I have it on PS3 and absolutely love it. Some critics have said that it is repetitive and short (yeah, you can probably finish it quickly if you just rush through the game), but I have played it a lot and still haven't finished the storyline. And I have never been stuck with it. I just keep finding myself climbing around the cities, which are huge. So the main thing of the game is controlling Altaïr, a member of some Assassins' order and assassinating people in the Holy Land during King Richard's crusades. But before each assassination you must do some "investigating" by completing little missions, and most of the time playing the game goes with them. Doing the little side missions like saving citizens and climbing up to "view points" (basically high towers) is fun and sometimes I just challenge them guardians to a little fight.
The graphics are stunning and the smoothness and flexibility of moving around by climbing on just anything you can think about. The area is enormous, with three big cities, one smaller town and a massive area between the cities consisting of small villages and routes. I think Assassin's Creed is one of the top 10 games I've ever played.
http://en.wikipedia.org/wiki/Assassin's_Creed
I have it on PS3 and absolutely love it. Some critics have said that it is repetitive and short (yeah, you can probably finish it quickly if you just rush through the game), but I have played it a lot and still haven't finished the storyline. And I have never been stuck with it. I just keep finding myself climbing around the cities, which are huge. So the main thing of the game is controlling Altaïr, a member of some Assassins' order and assassinating people in the Holy Land during King Richard's crusades. But before each assassination you must do some "investigating" by completing little missions, and most of the time playing the game goes with them. Doing the little side missions like saving citizens and climbing up to "view points" (basically high towers) is fun and sometimes I just challenge them guardians to a little fight.

http://en.wikipedia.org/wiki/Assassin's_Creed