How To: Instantly unlock all of the zombie maps in Call of Duty: Black Ops

Instantly unlock all of the zombie maps in Call of Duty: Black Ops

Learn how to unlock ALL of the zombie maps in Call of Duty: Black Ops without beating the single-player campaign! This clip will show you how it's done using the secret code "3arc unlock."

Call of Duty 7 (COD: BO) is the seventh installment in Activision's popular Call of Duty series of military-themed first-person shooter video games and the first to be set during the Cold War. COD7 is available for the PC, Xbox 360, PlayStation 3 (PS3) and Nintendo Wii.

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