Forum:Most underated CoD Game

List what you think is the most underated CoD Game so far and why.

Mine is Call of Duty 2: Big Red One. It had alot of good gameplay and a great storyline (it was my favorite game actually until Call of Duty 4 came out). Plus the gameplay system now on most console versions such as the ps2/ps3 originated with this game, like buttons for grenades, the weapon swapping button etc.