Call of Duty Online (also known as CODOL) is a Call of Duty game released exclusively in China as a "free-to-play micro transaction game" published, marketed, and distributed by Tencent Holdings and fully developed by Activison Shanghai and Raven Software. The game entered open beta on January 14th, 2013. The game features a new gaming model which gives the player the ability to personalize weapons, characters and equipment "with localized, unique content tailored to the needs and interest of gamers in China.". The game also reuses dozens of maps, character models and weapons from both the Modern Warfare and Black Ops series, which can be seen on its trailers.

The game features a campaign mode in which the player controls Rook and has returning characters such as Price, Soap and Ghost. There will also be a robot Zombies mode coming to Call of Duty Online.