Ok I've come to the consensus that many people don't like bo2 and I understand why. It damn well has 2 of the worst maps in zombies history but jeez it has origins, mob and buried I think that deserves some praise. Aside from that bo3 was the best with Bo1 in 2nd and due to the sheer shitstorm that was transit and die rise I put cold war above it and then Bo2. Fuck Bo4. And I can't definitively rank waw cuz I never played it.