Singleplayer
-COD2's length
-COD4's drama
-COD6's Action
-COD7's General Story
-COD5's Grittyness.
Multiplayer
-COD6's Addictiveness and Variety
-COD5's Balance
-COD4's General Fun
Extra Game Mode
-COD5's addictiveness and zombies.
-COD6's Variety.