Activision has announced that, the Call of Duty: Black Ops II has earned a revenue of $1 billion in just 15 days. The company says, it got these statistics from U.K. Chart-Track sales data as well as internal estimates. The company further states, that it breaks the record set by Avatar which hit a billion in 17 days. Activision also notes that more than 150 million hours of Black Ops II have been played since release on PSN and Xbox Live.