The Best COD there is....
Definitely the only Call of Duty you ever need to play in my opinion, great gunplay, a gripping and blockbuster story, that actually gives you interest. Of course, Multiplayer that is so phenemonal that even now, the original servers for this game are still up and definitely has a good online community. To tell you how good Call of Duty 4 is, Activision hasn't changed their game engine since Call of Duty, Advanced Warfare, Black Ops 3, these games use the exact same engine as Cod 4 only with slight differences, this is how good this game is!!