The Gearwork Dungeon
The dwarf kingdoms quake in fear! A fearsome, and fast, living Dungeon rises through its hallowed halls, and will soon reach the Dwarf Lord's throne! It must be stopped.
A team of crack speleologists has been assigned to board the bullet-shaped burrowing vessel and steer it away to avert disaster.
An adventure for 13th age set at 5th level; satisfyingly crunchy narrative D&D variant with player narration, explosive derring-do and lots of dwarves.