Stephen Mulrooney

An official OSE supplement of demons, cults, and dark magic.

The oldest and most influential sci-fi TTRPG of all time meets the world’s most popular roleplaying game, with a complete 5e conversion by World’s Largest RPGs.

A fantasy adventure tabletop RPG, inspired by D&D 5e classes and monsters, but built with modern, narrative rules that strive for fluid gameplay, creative freedom, and a cinematic feel.

Whether you’re a group of local heroes sent to investigate mysterious goings-on in the nearby haunted wood, or famous mercenaries plotting and scheming in the big city, the MCDM RPG makes building adventures and fighting monsters fun.