This Expansion pack doubles the fun by adding 25 more monsters. basilisk, boogeyman, chimera, ettin, ghost, snake, hell hound, hydra, leprechaun, mammoth, manticore, minotaur, pixie, roc, sea serpent, skeleton, sphinx, spider, stegosaurus, troll, werewolf, wraith, wyvern, yeti, make-your-own, and, of course, the gorilla. You must have Monster Derby to play. Players move monsters to try to engineer a finish by the monsters picked most highly on their secret agenda cards.