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

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.

The Codex includes new content to bring different styles and settings to your Monster of the Week games. It’s written by Michael Sands and Marek Golonka, and being developed in partnership with Evil Hat Productions.