Call of Duty: Modern Warfare 2 has generated more than $1bn in sales in two months

"Activision Blizzard, Inc. (Nasdaq: ATVI) announced today that Infinity Ward's Call of Duty: Modern Warfare 2 continues to set sell-through records crossing the $1 billion mark in retail sales worldwide since its launch in November, according to internal Activision estimates.
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 Night, 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.""
Source: Activision press release, 13th January 2010