Theoretical

"Choice, is what presents us with a multitude of paths, because choice creates a flow of electrons through the brain in a manner that inexorably leads to quantum superposition, and the many-worlds that are the inevitable result."

- Kevin Michel, Moving Through Parallel Worlds To Achieve Your Dreams

Theoretical, also known as Apocalypse and Agartha, is a Zombies map included in Call of Duty: Black Ops II. It is the nineteenth (chronologically both the second and final) map, and is the first to include multiple areas as well as both main groups of playable protagonists: the "Original Characters", , ,and (still trapped within 's body) and the "Green Run Group" , , ,.

Overview

 * Please note: This map continues after the end of Maxis' side of the Buried easter egg. If Richtofen's side is completed, this map would not happen, and hence be deemed as "non-canon".

Continuing after the events of Maxis' side of, the "Green Run Group" get teleported to the centre of the Earth by a and end up alongside the "Original Characters" in a ruined city found in the depths of the Earth. The Zombies eyes, like at the end of Buried, glow an orange colour, indicating that is in control of the Zombies. Despite this, when in one area of, Crusader Zombies with blue/purple eyes appear. This is due to them being affected by Element 115, and are not controlled by a single entity. The map features many Wonder Weapons, the return of the s and, as well as the return of several power-ups and Perk-a-Colas.

Like, there is no power switch on the map, instead having six generators that power the area directly around it. While neither the nor the  need power to be used, the Mystery Box's default spawn can only be opened by turning on the near-by generator, while the Pack-a-Punch raises up from the ground after all six generators are active.

Features

 * A new boss enemy:, which spawns every time a Generator is powered.
 * Returning boss enemies: (in Call of the Dead) and  (throughout any world)
 * The new Spiritual Portals, which throw all players to a place in the past (,, , , , , , , , or  in a randomized order)
 * AI-controlled allies (the "Celebrities" while on Call of the Dead:, , and )
 * appears as an indestructible Zombie "ally".
 * A new major easter egg, Inter-dimensional Vortex.

Opening
The blue teleporter effect shows on screen, with the previous other stages passing by quickly Tank: "What the hell did you do?" Nikolai: "I did what Richtofen did last time!" Four pairs of feet land on a red-crusted Earth, with lava spewing out of the ground. Tank: "Oh god. What the hell did we do?" Maxis: "Ah, the entire gang's here now." Samantha: "Daddy?" The camera pans upwards showing the faces of the four heroes, with Samantha's face (ghostly) overlaid on Richtofen's. A group of Zombies swarm the four, and trap them within a circle. Maxis: "Nice try, Edward. I can see through your tricks." ''A ghostly silhouette of Ludvig Maxis appears in front of the four. He grabs the Wunderwaffe DG-2 from Nikolai's hands and shoots it into the air, before tossing it into a lava pit.'' Tank: "What the fuck, Max?" Maxis: "Thank you so much for your help. Now, I must enter the Aether so I can reunite with Samantha." Maxis disappears, and Samantha's hand shoots out. Samantha: "But...?" Four figures appear in front of the Original Characters (Girl): "Marlton?" Marlton: "Blast them!" ''Zombies quickly die off, but none of them advance upon the figures in the centre of the circle. Few zombies remain when they stop firing.'' Maxis: "I regret to inform you all that none of you will survive this ordeal. It has been a pleasure working with you all." The Zombies' eyes glow yellow for a moment, before retaining their orange colour. Maxis: "Get them."