This is my favorite Call of Duty. I love it so much. The campaign, while not my favorite, is great and pretty innovative for Call of Duty. A branching story with different endings is a big leap for the franchise, one that unfortunately didn't stick around very long. The multiplayer is my favorite here. I have so many memories on this game, its where I met one of my longest running friends, and a game that took hours of my life. The zombies feature some iconic maps and the best gameplay to date at the time.