this is what you call an all right game.
I'm going to start off with the single player. To tell you the truth, the story in this game isn't all that exciting. It might be fun the first time you play it, but after that, this game doesn't have all that much replay value.
One good thing about this game is every single level is co-op. So while you sneak around and take cover behind random objects, your friend is going to just run out and kill as many people as he can. Which you can do, but someone unfamiliar with the controls would have to work at it. Every mission is even co-op over xbox live. So you get a full screen, and a partner who knows what there doing.
And now, the best part of the game. The multiplayer! This is a must have game not because the missions, but you can play all the games that you can play with people on Xbox live against AI. This is truly one of the best multiplayers out on the 360. You can even play with up to 4 of your friends against bots on the same console. But if you don't like multiplayer, this is not the game for you.