Some more interesting revelations have been made at Activision's Call of Duty XP convention, this one during a panel of Treyarch employees who were offering fans a behind-the-scenes look at the role and creation of maps in Call of Duty: Black Ops.
The panel revealed that around 50% of all maps that moved into Black Ops' development phase never saw official release, despite four map packs being released for the game so far during its lifespan.
One of the maps that was shown off to the gathered audience was "War Museum", which was a recreation of the "Castle" map from World at War. It was canned because Treyarch didn't want to reuse content from previous games.
Treyarch senior game designer Phillip Tasker stated that some of the maps they developed for Black Ops took almost a year, saying, "Call of Duty level designers are three-part designers: one part artist, one part architect, and completely insane."
The work has paid off, since it was released the panel also revealed over 18 million maps for Call of Duty: Black Ops have been by gamers.