Call of Duty: Modern Warfare 2 (previously marketed as simply Modern Warfare 2) is a first person shooter video game developed by Infinity Ward and published by Activision for Microsoft Windows, PlayStation 3, and Xbox 360. 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 along the same storyline.