Activision announces a pair of maps are now unlocked in Call of Duty: Black Ops on all platforms in honor of the Presidents Day weekend. The maps are DOA and Five, and here's word:

DOA, or Dead Ops Arcade puts you and up to three other soldiers in a pursuit of the Cosmic Silverback; tracking him through a gauntlet of arenas filled with traps, treasure and waves of flesh-hungry zombies.

Five features four significant real-life figures from the Cold War era: John F. Kennedy, Robert McNamara, Fidel Castrol and Richard Nixon. They are all meeting in the Pentagon when zombies break in and start attacking.