SextusMaximus said:
CoD4's multiplayer, CoD5's campaign + multiplayer + zombies, CoD6's Spec Ops + CoD7's Campaign + Zombies.
CoD4's multiplayer was fun for about 10 minutes, then you realised it was just a grind to get overpowered weapons to beat people who didn't have to time to unlock it. Too easy, and unbalanced.
WaW's campaign was a joke, and while zombies was ok, other games did it better, first. No redeeming features or interesting parts.
Spec Ops was dire. Same problems as all of the CoD campaigns - Linear, set occurrences, dull AI and pretty much only one way to do things. Yawn.
Black Ops campaign is better than MW2 and WaW's, but it's still retarded. Terrible. Zombies has the same problem as before, with no real improvements.
Terrible series.