Call of Duty 2 is a first-person shooter video game developed by Infinity Ward and published by Activision in the most regions of the world. It is the second installment of the Call of Duty series. Announced by Activision on April 7, 2005, the game was released on October 25, 2005, for Microsoft Windows and on November 22, 2005, as a launch title for the Xbox 360. Other versions were eventually released for OS X, mobile phones, and Pocket PCs.
The game is set during World War II and the campaign mode is experienced through the perspectives of four soldiers: one in the Red Army, one in the United States Army, and two in the British Army. It contains four individual campaigns, split into three stories, with a total of 27 missions. Many features were added and changed from the original Call of Duty, notably regenerating health and an icon that indicates a nearby grenade about to explode.
The game drew critical praise, particularly for the graphics, sound and the regenerating health system. As a launch game, the Xbox 360 version sold over 250,000 copies in its first week, and had sold over 2 million copies by January 2008. By November 2013, the game had sold over 5.9 million copies.