Crypt City

Introduction
Crypt City is a city located on the aptly-named Crypt Island. It is one of the largest cities in the New World as just its urban area's square footage is comparable to that of an entire island. It houses over thirty million people and is one of the hubs of the underworld. The entire series of xxx takes place in this city.

History
The island on which Crypt City was formed used to be home to a unique race of Fishmen who wielded strange, eldritch powers. However, this race was exterminated when human settlers moved in. Because of this mass genocide, the settlers were largely frowned on and were ignored in terms of trade and Marine protection, being left to fight on their own. Eventually, once the settlers had founded a sizeable village, pirates started flocking there to plunder, only to find that there was no Marine resistance whatsoever. As a result they realized that a far more lucrative business opportunity would be to use this city as a a black trade hub because it was completely under the radar. Over centuries, the island grew in popularity and eventually it became a haven to the evil.