This is by far one of the most legendary titles in the entire COD franchise.

+ Incredible campaign with a phenomenal story.
+ Gritty story with good humor and thought provoking commentary on war.
+ Gun design and overall gameplay is peak gaming.
+ Innovative gameplay (for the time)
+ Hans f**king Zimmer wrote the music for the game. Look up the games opening title soundtrack and tell me it's not the most hype, might I remind you MAIN MENU, soundtrack in a game.
+ Multiplayer was, and still is, extremely fun due to the lack of SBMM.
+ Special Ops is better than Zombies, I said what I said.
+ In-game chat was based on Xbox 360. Best years.

All in all, this is the best COD very closely followed by the original Black Ops.