Dungeon Crawl Classics (Adventure) #87 Against The Atomic Overlord

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 a conflict with four deadly factions to save a world - or destroy it!