Overall my favourite CoD game was MW2, because I really enjoyed the multiplayer, and it was the first one I'd ever played. For zombies, World at War and BO2 were the best. I loved Der Riese from WaW, and the newest map of BO2, Buried. MW3 and BO1 I think were really bad. I never really played BO1 multiplayer, only really the zombies. MW3 I only really played multiplayer b/c that's what my friends played and I didn't wanna be playing MW2 with randoms when I could be playing with friends. Truth be told, I was terrible at all multiplayers on all CoD games... I'm not really good... Best score ever was 33-0 on MW2, but I was shitting myself the whole time, (I didn't have Nuke on ): )

 

Honestly I thought black ops 1 was the most badass and best call of duty because of its time era. I loved the cold war/nuclear era and the zombies was the best in that game.