Modern Warfare 2 (packaged as Call of Duty: Modern Warfare 2) is an upcoming 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 is due for worldwide release 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.Modern Warfare 2 will be 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, a port of Call of Duty 4 adapted by Treyarch for the Wii console. In addition, a comic book series based on one of the game’s characters will also be produced, entitled Modern Warfare 2: Ghost. The developer has stated that the game’s proprietary IW 4.0 game engine is an improvement over the engine used in its previous game.