🐙 Call of Cthulhu RPG
A journey into cosmic horror and human fragility — horror investigations in the 1920s, based on the stories of H.P. Lovecraft. Instead of gaining power, your characters often lose their minds discovering truths that were meant to stay hidden.
📖 About This Guide
Call of Cthulhu is a tabletop roleplaying game where knowledge is both power and poison. You play ordinary people — investigators — who confront extraordinary, incomprehensible horrors. It's less "How do I defeat the monster?" and more "How do I survive long enough to warn others?"
This guide walks you from the core ideas of cosmic horror through building a character, the game's mechanics, running investigations, the sanity system, the Cthulhu Mythos, and a library of ready-to-play characters you can drop into any session.
What You'll Find Here
- The philosophy of cosmic horror and what makes this game different
- Step-by-step character (investigator) creation
- The percentile (d100) system and core game mechanics — plus a live dice roller
- How to structure and run investigations as the Keeper
- The sanity system: your mind as a resource
- A tour of the Cthulhu Mythos and a deep bench of pre-made characters
Who This Is For
- New players who want to understand the game before their first session
- Keepers (game masters) planning and running scenarios
- Fans of mystery, psychological horror, and Lovecraftian fiction
🗂️ The Guide
Part 1: The Basics
What Call of Cthulhu is and how to build an investigator.
Part 2: Playing the Game
Running investigations and the sanity system.
Part 3: The Mythos & Cast
The Cthulhu Mythos and a library of ready-to-play characters.
📚 Resources
About the Game
- Call of Cthulhu is published by Chaosium Inc. — the guide here is a fan reference and learning aid.
- Rooted in the cosmic horror fiction of H.P. Lovecraft and the wider Mythos authors.