This is the home of Taylor's DragonMech campaign, set in Edge.
Medieval fantasy mechs powered by steam, magic, or the labor of a thousand slaves
DragonMech is a medieval fantasy campaign setting unlike any other. It is a world destroyed by relentless lunar meteor storms called the lunar rain. To survive, the surface races have used magical and mechanical means to build thousand-foot-tall city-mechs, which now house most of civilization. Kingdoms have been replaced by mobile mechdoms, and the mounted knight is anachronistic in the face of steam-powered combat mechs. While lunar creatures launch invasions from the skies, fleets of smoke-belching steam-mechs battle for scarce supplies of wood, steel, and coal.
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It has been a hundred years since the moon started its gradual decent into the planet's atmosphere, and the world below was plunged into chaos. In Highpoint, lunar rains have left the land covered with pock-marked craters, and the lunar dragons that followed decimated centers of civilization. Thousands of refugees fled into the Underdeep looking for shelter from the dangers above. There they fought dwarves and other races for the limited cavern space, causing decades of war and bloodshed. However, out of the depths came an old dwarf who taught the dwarves how to make steam-powered mechs. This new technology has brought forth the Second Age of Walkers, a time when new nations are forming out of the old ones and infant gods whisper in the night while traditional gods lay silent. Now during a time when steam-technology rivals magic, people do what they can – what they must – to survive.
In the city of Edge, a small group of adventurers dreams of greatness, and of going against the Lunar Gods themselves.