A level 5 adventure for Dungeon Crawl Classics by Goodman Games.
Description from publisher:
For a thousand years, Mezar-Kul has known only war, and now the Overlord reigns supreme. From his gargantuan metal fortress he rules the blasted remains of the planet’s last city. Hope seems lost – until visitors arrive from a distant world, bringing uncanny, magical powers. Your adventurers must pick a path through twisted ruins, ancient missile silos, strange monorail systems, and conflict with four deadly factions to save a world – or destroy it!