Call of Duty: Modern Warfare 2 has sold 20m copies

"Call of Duty: Modern Warfare 2 has passed another milestone. In a pre-Electronic Entertainment Expo analysts event tonight, Activision announced that the Infinity Ward-developed first-person shooter has now sold more than 20 million copies worldwide.
Activision believes first-person shooter fans have an insatiable appetite for quality examples of the genre.
If that game's success wasn't staggering enough, CEO Bobby Kotick told analysts that the next title, Treyarch's Call of Duty: Black Ops, could possibly do even better. Kotick noted multiple times that the Call of Duty series has grown more successful with each new installment and said that preorders for Black Ops are tracking higher right now than those of Modern Warfare 2 when that game was this far out from release. Black Ops is set for a November 9 debut."
Source: Gamespot, 15th June 2010