I know its not a traditional zombie map, but I think Dead Ops Arcade deserves a mention in the OP as well, I thought it was a neat if not somewhat shallow take on the mode.
I think I could add them when I get the chance. If people also want me to I could add Extinction if people also want. It's not "Zombies" but it does share some of the DNA.
Always interested in those, but not really in CoD - wish they would sell that seperately. Also is it solo-able? I play ZAT and KF2 for example solo as well.
Yes. Though unlike KF2 there's no difficulty modes and it just keeps going until you die.