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How to Get All the Zombies Levels Unlocked for Call of Duty Black Ops for the XBox 360

"Call of Duty: Black Ops" for the Microsoft Xbox 360 offers up plenty of the standard multiplayer team-based scenarios for which the "Call of Duty" series is well-known. It also features "zombie" maps in which you and three friends must defeat waves of the undead to achieve the highest score possible. There is a secret way you can unlock two additional maps for play immediately, by completing a series of steps at the main menu.

Instructions

- 1
  Press the "LT" and "RT" buttons repeatedly at the main menu. This will cause your character to break free from the binds holding him in his chair.
- 2
  Walk forward between the bank of televisions and to the left around the equipment. Keep going forward, and you will see a computer terminal.
- 3
  Input "3ARC UNLOCK." This will open up the zombie map in the Pentagon, as well as a map that looks like an old-school, top-down shooting game.
- 4
  Enter the menu, and choose "Zombies" to view your options. You will now see that these maps are unlocked, and you can select them for play.

Xbox 360