Call of Duty 4

So there's a new Call of Duty out. I'm sorry to say that I myself have not played this game yet. I plan to buy it though.. I love the cod games and all of my friends say it is a lot better than the other ones, which I can't believe. Unlike the other COD the new one is modern warfare (killing terrorists). If you like all the other COD games I really don't see a reason why you wouldn't buy this game. All the feedback I've gotten about it is positive, so check this game out and tell me what you think.