Unlock the "Double Whammy" trophy in the single-player campaign mode of Call of Duty: Black Ops with this gamer's guide! This video walkthrough will teach you everything you need to know to earn the "Double Whammy" achievement.
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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