From the back of the book: Adventures on Dungeon Planet is a science fantasy supplement for the award-winning role-playing game Dungeon World. This book contains: Four new character classes: the Earthling, the Engine of Destruction, the Mutant, and the Technician. *Three new PC races: aliens, androids, and white apes. Four new compendium classes: the Alien, the Scientist, the Sniper, and the Visitor. Futuristic gadgets, special equipment, and robots. New rules for spaceships. New science fantasy dangers and two example fronts that use them. Procedures for creating alien planets and cultures. More than 30 new science fantasy monsters.