Hello all! I've just completed a major labor of love with Curse.
Curse: The City of One Thousand Martyrs is a system-agnostic setting book detailing a wretched and ruined city at the edge of civilization. Designed to easily be used with most fantasy roleplaying games, the book details the city itself, the people and creatures that inhabit it, as well as the lands around the city, detailing greater Teranern. In addition the book features a two-page adventure venturing below the city itself.
https://dicemonkey.itch.io/curse-the-city-of-one-thousand-martyrs