Welcome to Necrotica. Most of the world has been converted into desert, and 99.99% of all human life have been converted into ghouls, revenants, draugr, and other various undead beasts. Only a few places have large human populations, such as Fort Hope, a massive amount of aircraft carriers and large cruise ships chained around an array of oil rigs, which is self sustaining off the coast of California. The Untied States have been converted into desert, and cities have been nuked into glass.