Call of Duty: Modern Warfare 2 is a 2009 first-person shooter video game developed by Infinity Ward and published by Activision for Xbox 360, PlayStation 3 and Microsoft Windows. Officially announced on February 11, 2009, the game was released worldwide on November 10, 2009. It is the sixth installment of the Call of Duty series and the direct sequel to Call of Duty 4: Modern Warfare, continuing the same storyline, with Call of Duty: Modern Warfare 3 ending the storyline.
However, while the working title 'Call of Duty 6' was used by Infinity Ward to refer to the game, an official statement from the company stated that "It would be incorrect to refer to 'Call of Duty: Modern Warfare 2' as Call of Duty 6". It was released in conjunction with two other Call of Duty games: Call of Duty: Modern Warfare – Mobilized for the Nintendo DS, and Call of Duty: Modern Warfare: Reflex, a port of Call of Duty 4 adapted by Treyarch for the Wii console.