User blog comment:Der Schreiber/Mass Effect Action Figures - Now with exclusive DLC?!/@comment-2127131-20120116174537/@comment-78.157.10.64-20120117083432

Could you believe that for Call of Duty: Black Ops, that three of the map-packs had multiplayer DLC, But the main reason for the popularity  were the Zombies levels. The last map-pack was only Zombies maps, and I think it was the most succesfull.