WASHINGTON, DC (WUSA) -- Fifteen days after it hit store shelves, the Call of Duty: Black Ops Two video game reachedone billion dollars in sales.

According to game maker, Activision, the latest installment isits best seller.

It took just a smidge longer, 16 days, for last year's Call of Duty: Modern Warfare Three to tohit thatbillion dollar milestone.

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