The Cthulhu Hack (hardcover) + complimentary PDF

The Cthulhu Hack is a standalone game of investigation and dealing with the sanity-shattering shock of facing Things Best Left Unknown. The book includes simple mechanics to handle threats and investigation, ready-to-play archetypes and a flexible character creation system, horrors and an overview of the Mythos, and a complete modern day adventure, Save Innsmouth.