A couple of days ago Activision has announced collector's editions of Call of Duty: Black Ops, explaining that among other things in there we also found four additional co-op maps. Now the Canadian site of Best Buy seems to have accidentally revealed the nature of these maps, writing on their pages that are four levels for the Zombie mode, already seen in Call of Duty: World at War.

Shortly after publishing this information, then Best Buy has the correct information by writing that it is generally co-op maps, probably because called by Activision for revealing the information too soon. The September 1 will be lifted the veil from the compartment multiplayer game and find out if this latest rumor is confirmed.