Activision has let us know that Modern Warfare 2 has crossed the $1 billion mark in retail sales since it's launch in November '09.

This is an amazing achievement for both Infinity Ward and Activision (okay, 95-5%?)! Even though many have seen it coming, way before Modern Warfare 2 was released on November 10th, 2009.

In its first five days alone, the game sold an estimated $550 million worldwide, outpacing five-day worldwide theatrical box office gross figures for such films as Avatar, Harry Potter and the Half-Blood Prince and The Dark Knight, according to internal Activision estimates and boxofficemojo.com.

"Call of Duty:Modern Warfare 2 has exceeded our expectations and shattered theatrical box office and video game records," said Robert Kotick, CEO of Activision Blizzard. "There are only a handful of entertainment properties that have ever reached the $1 billion mark, which illustrates the power of the Call of Duty franchise and mass appeal of this game."