A new feature to the series was the addition of a cooperative mode, which supports up to two players locally and four players online. The game also contains downloadable content called 'map packs', which can be purchased online.

Vehicles, in the form of tanks, that players can control appear on certain multiplayer maps. The multiplayer component of the game contains various game modes and a leveling system that allows the player to unlock additional weapons and rewards as they progress, similar to Call of Duty 4 and repeated in many following Call of Duty entries. Miller, US Navy Petty Officer Locke and Red Army soldier Private Dimitri Petrenko, and is based on several historical battles. It is told from the perspectives of Marine Raider Private C. The narrative for the campaign mode focuses on the Pacific and Eastern Front theaters of World War II, involving the United States, Empire of Japan, Soviet Union, and Nazi Germany. A Windows Mobile version was also made available by Glu Mobile. It was the first game in the series to feature the zombies mode featured in later sequels. World at War received ports featuring different storyline versions, while remaining in the World War II setting, for the Nintendo DS and PlayStation 2. The game is also the first title in the Black Ops story line. It is the fifth main installment of the Call of Duty series and returns the setting to World War II. It was released for Microsoft Windows, the PlayStation 3, Wii and Xbox 360, in November 2008.

Call of Duty: World at War is a first-person shooter video game developed by Treyarch and published by Activision.

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