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How to Unlock Zombie Maps in Call of Duty

"Call of Duty: Black Ops" offers a cooperative "Zombies" mode in addition to standard team-based multi-player battles. In the "Zombies" mode of this 2010 Microsoft Xbox 360 title, you must work together with up to three friends to survive wave after wave of a zombie onslaught. The first zombie map is available from the start, but you must use a secret trick to play the other two zombie maps. Perform this trick on the title screen, where your character is tied up in a chair.

Instructions

- 1
  Press the "LT" and "RT" buttons alternatively to wiggle your arms. After a few seconds you will break the wrist straps and free yourself from the chair.
- 2
  Walk forward and then left around a bank of monitors. Go to the computer terminal at the back of the room.
- 3
  Enter the code "3arc unlock" to unlock the map known as "Five." The action takes place inside the Pentagon, where you and your friends play as John F. Kennedy, Richard Nixon, Robert McNamara and Fidel Castro to stave off the zombie invasion.
- 4
  Input the code "DOA" in the computer to unlock the "Dead Ops Arcade" mode. This map is different than the other two zombie levels in that it is configured as a classic arcade top down-view shooter.
- 5
  Go to the "Zombies" menu. You will now see these two new maps unlocked for play in the game.

Xbox 360