User blog comment:KATANAGOD/Treyarch Teases Zombies on Facebook/@comment-4312627-20120914015522/@comment-110.32.52.65-20120915005422

The campaign, multiplayer and zombies aren't bought seperately. So that twenty bucks each is totally invalid. If anything, the campaign would cost the most.

And where I live, the game isn't 60 bucks. It's $90.