Call of Duty 2 is a 2005 first-person shooter video game and the second installment in the critically acclaimed Call of Duty series. It was developed by Infinity Ward and published by Konami in Japan and Activision in the rest of the world. The game was released on October 25, 2005 for Microsoft Windows PCs and on November 22, 2005 as a launch game for the Xbox 360 in Europe, Australia and South America, and later in Japan. Other versions were released on other platforms, including mobile phones as well as 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 twenty-seven missions. Activision officially announced the game on April 7, 2005 in a press release. Many features were added and changed from the original Call of Duty. The most notable change is the regenerating health. Additions include an icon that indicates a nearby grenade about to explode.

The game was met with positive reception. Critics praised the game particularly for the graphics, sound and the regenerating health system. The Xbox 360 version sold over 250,000 copies in its first week, and had sold 2 million copies by January 2008.