The campaign was such a let down. That whole theme they went with for the plot... Really, you get a big shot who does movies to write your game and this is all you can come up with?
[spoiler]Oh wow, the villain used to be a good guy, the best in fact, but when he got sacrificed to save THE ENTIRE SQUAD he got his panties in a bunch and is now on a quest for revenge against his homeland who he previously held so dear and fought for so hard that he was in Tier 1 Special Ops! Never seen that one before! The leader of the good guys is... Your father! WAH! The dog could have been awesome but nope, just a tool in the campaign to be used for killing that barks, then wound up not being in most of the game. Once he got hurt it wasnt dramatic at all, you just had to pick him up, drop him, shoot the bad guys, repeat about ten more times. The enemy who took over the world was South America, no racist but really? WOULD NEVER HAPPEN! The whole campaign just lead you by the nose, shoot, shoot, boring cut-scene, back to shooting, boring quick-time event, shoot again. [/spoiler]
Dont even get me started on the multiplayer!