Crossverse (Multiverse)

The Crossverse is a special kind of universe in the Multiverse that appears in the non-canonical Nazi Zombies storyline Apocalypse VI: Realms of the Multiverse.

Overview
In the Apocalypse VI storyline, the Crossverse is a universe in the Multiverse where several universes, usually consisting of five to seven, are intertwined or connected. This connectivity is usually about two miles wide, tall, and long. Creatures and other living and non-living organisms can be sent from its usuall universe into the Crossverse, usually by a black hole/worm hole or gravity. This makes the Crossverse very unstable and dangerous to most kinds of life, however the Xucubi are known to possess the capabilities to travel in the Crossverse without harm. According to several Central Intelligence Agency scientists, there are a total of seven crossverses, each of them harboring their own universes.

The Crossverse is explored by Alex Mason, Jason Hudson, Grigori Weaver, and Alex Mason in the level "Crossroads of Destiny". During this time, the four men encounter several kinds of zombies, including Anti-Matter Zombies, Astronaut Zombies, Xucubi Zombies, Phasing Zombies, Multi-Dimensional Zombies, and Multiversal Zombies. They also encounter Multiversal Waves, Gravity Fluctuations, Random Teleportation, Quantum Doubling, Suspended Animation, and Dimension Flattening. Considering the large amount of odd phenomenon that doesn't take place on Earth, one can assume that this crossverse has a total of seven universes, however none have an official name.