The single-player campaign will feature two connected storylines, one set in the 1970s through 1980s and the other in 2025. The protagonist of Black Ops, Alex Mason returns as the protagonist in the Cold War section, where he will be fighting in proxy wars for the United States in the Cold War. Known locations for this section of the game include multiple sites in Central America and the Soviet invasion of Afghanistan. This section of the game will also see the rise to infamy of the game\'s primary antagonist, Raul Menendez. Mason\'s friend and colleague Frank Woods will also return (in spite of the fact he was seemingly killed in Black Ops), and narrate the story into the 2025 section of the game.
The 2025 section of the game features as a protagonist David Mason, son of Alex Mason. In it, a new cold war has broken out between China and the United States after China bans the export of rare earth elements following a cyberattack that cripples the Chinese Stock Exchange. In this era, war is defined by robotics, cyberwarfare, unmanned vehicles and other modern technology. Taking advantage of this stand-off, Raul Menendez attempts to bring the two powers to a full-blown war by inciting conflicts between the two. Known locations for this section of the game include Los Angeles, Singapore and Socotra, Yemen.
In the 2025 section of the game, the player will have access to special \'Strike Force missions\', that feature permanent death and the outcome of which can affect the course of the campaign\'s storyline.
It has been hinted at that the side-plot of Viktor Reznov and his relationship with Alex Mason, which began in Black Ops, will be continued in Black Ops II. Strike Force missions
Black Ops II will be the first Call of Duty video game to feature branching storylines, in which the player\'s choice affects both the current mission and in turn, the overall course of the story. The game will feature special \'Strike Force\' missions that are offered as a choice to the player during the campaign. Choosing one of the missions locks out the others unless the player begins a fresh campaign.
Strike Force missions allow the player to control a number of different war assets, such as unmanned aerial vehicles, jet fighters and robots. If the player dies in a Strike Force mission, the campaign continues recording that loss, as opposed to letting the player load a previously saved checkpoint. The player\'s progress in the Strike Force missions may go on to change even the plans of the story\'s antagonist, Raul Menendez. By the end of the game, the player may have changed the results of the new Cold War, and the player will be shown what could have gone differently. Zombies
Treyarch has confirmed that the Zombies mode will return for Black Ops II with its own campaign. Its predecessors were Call of Duty: World at War and Call of Duty: Black Ops. This is the third time for the Zombies mode to appear in a Call of Duty game, and the first time to have its own campaign along with the main story. Treyarch has also confirmed that Zombies will implement the multiplayer engine, allowing for a deeper community experience along with new game modes. It has also been confirmed that the Zombies mode will support 8 player co-op, unlike Call of Duty: World at War and Call of Duty: Black Ops, which only support 4 player co-op.