Packed with rules options and scenarios, the Call of Cthulhu: Keeper Companion has something for everyone, whether novices or veterans. Designed to improve your experience and help you get the most out of your games while ensuring your players maximize their fun, too!

The Keeper Companion includes:

New methods for creating investigators.
System for creating investigator organizations & revised skills.
Streamlined & optional rules for skill rolls, combat & chases.
Sanity rules revisited.
Advice & options for online play & other considerations
Advice on scenario design, game mastering, and spicing up monsters & NPCs.
Revised investigator and pulp hero sheets and other play aids.

Plus three new scenarios, each showcasing the options in this book:

Little Miracles: a beginner-friendly scenario set near Arkham, concerning a missing professor from the Miskatonic University.
If I Had a Hammer: a comfortable Friday night at home turns into a nightmare.
What a Puzzler!: an investigative scenario about the new fad for jigsaw puzzles.

It may not be possible to ship very heavy items outside of the Mainland UK.
Released: 27 October 2026