Star Wars Battlefront II is a pretty badass game. I know the first Battlefront game got a bad wrap, but the second one appears to have fixed the major problems from the first one. The style of play is very enjoyable, especially in co-op mode. Basically, you have a number of troop/re-enforcements that you have to complete various missions with. These lives are shared by the players and the computers. It works pretty damn well.
The stage designs are passible, and the graphics are decent. All things considered it is a pretty fun game. I is pretty sweet getting to be a republic trooper through the rise and fall of the empire. The game itself is not very long, we are more than have way through in less than five hours, so it is probably more a rental that a buy. But, I highly recommend that everyone check it out. It should make for a fun weekend.