Black Ops 3 is arguably the longest Call of Duty game. Most people report finishing the main story in about nine hours, which is certainly a respectable amount of time for a first-person shooter that releases just about annually.

Characters and Setting\n\n Black Ops II begins in the year 2025, where China and the United States are in a cold war after China stops exporting rare earth elements. In this future setting, militaries use robotic weaponry, cyberwarfare, unmanned vehicles and futuristic technology.

Call of Duty 2 contains three individual campaigns, fought in the roles of four World War II soldiers, for a total of 27 missions. The game has four difficulty levels: Easy, Regular, Hardened, and Veteran.

The Xbox 360 version Call of Duty: Ghosts comes with two discs. Follow the steps below to play either Campaign or Multiplayer. To play the Call of Duty: Ghosts Campaign, you will first need to install the contents of Disc 2.