You have to keep the doors to the Outside from swinging open – no matter what the cost in life or sanity. You have to piece together clues from books bound in human skin, from eviscerated corpses covered in ichor, and from inscriptions carved on walls built before humanity evolved. You have to go wherever the answers are, and do what needs to be done to protect humanity. But do you dare to follow… the trail of Cthulhu?

Trail of Cthulhu is an award-winning roleplaying game of investigative horror, powered by the GUMSHOE system and produced under license from Chaosium. Acclaimed expert on the eldritch Kenneth Hite weds his encyclopedic knowledge of vivid historical detail to his mastery of H. P. Lovecraft’s classic horror tales to bring their cosmic malignity forward into the 1930s—a time when the creeping madness of the Great Old Ones intermingles with the sweeping cruelty of global totalitarianism.

Trail of Cthulhu is designed for investigative play: the challenge is in interpreting clues, not finding them. The game also offers:

• Two modes of play: Pulp (for the “desperate action” feel of Robert E. Howard or Indiana Jones) and Purist (full of philosophical horror and cosmic dread)
• A new take on Lovecraft’s creatures and cults that makes even the most familiar Mythos elements surprising and scary at the gaming table
• Innovative rules for sanity and stability
• A Drives mechanic that addresses the perennial horror RPG question, “Why don’t we just forget we saw anything, and go home where it’s safe?”
• GM advice on how to run a horror adventure
• Detailed notes on designing an enthralling, cohesive investigative adventure using the GUMSHOE system’s clue structure.