Zombie Hell

Zombie Hell is the given name by the writers of Zombies Vs. Idiots to describe a mysterious alternate dimension existing in parallel to the human world. Zombie Hell was in some way 'created' on March 31, 1983.
The Zombie Hell is perceived to have existed before as a regular parallel dimension. During the medieval times, the dimension existed in North America, in the exact area of what would become Douglas in the human world. However, due to a dangerous infection and the lack of medical technology caused the disease to spiral out of control, sending the colony in a downhill trajectory.
In the 1960s, there were several failed attempts to open up a portal to this world by another interdimensional device.