Activision’s first-person shooter multiplayer game Call of Duty: Modern Warfare 3 has grossed more than $775 million in its first five days of sales, the company reported Wednesday. In just its first day on the market, Activision sold more than 6.5 million units in North America and the United Kingdom for an estimated sell-through rate of more than $400 million.  Activision claimed the new edition in its debut — for about $60 a pop — has surpassed the openings of all movies, books and videogames. It even surpassed last year’s release of Call of Duty: Black Ops, which grossed $650 million, and Call of Duty: Modern Warfare 2, which sold $550 million. Activision Blizzard’s CEO Bobby Kotick boasted to AllThingsD that the Call of Duty franchise is one of the most valuable entertainment properties worldwide, having exceeded $6 billion in lifetime revenue.