From the back of the book: See how the other half lives! Herpulh the goblin heard a knock-knock-knocking in the upper corridor—those nosy explorers have found the secret entrance to the goblin den! Herpulh must hurry to warn the tribe. If the invaders cut him off at the pass, there will be no means of stopping their mad advance into the lair! Welcome to Reverse Dungeon, the adventure where everything is backward! Instead of playing bold heroes who venture into dens of evil, the players take the roles of the monsters, determined to stop the adventurers from invading their homes. Instead of always being the good guys, the players get a chance to be the bad guys. Reverse Dungeon contains three linked mini-campaigns in which the players represent: Goblins whose warrens are under siege from a band of heroes seeking fame and fortune; Guardian abominations whose vaults are attacked from several directions at once; and Ancient undead that must defend the silence of their tomb against crusading clerics intent on destroying them. Enter the Reverse Dungeon—and find out how it feels to be on the receiving end of a hero's blade.