Designed for both newcomers and veteran Keepers, the Companion offers new ways to create investigators, organize investigator groups, and fine-tune the rules for running Call of Cthulhu games.

Inside the 226 page book, Keepers will find new investigator creation methods, rules for establishing investigator organizations, and revised skills. Optional and streamlined rules cover skill rolls, combat, and chases, while the book also revisits the game’s Sanity mechanics.

The Keeper Companion also provides advice for running games online, designing scenarios, and improving gamemastering techniques. Additional guidance explores ways to make monsters and NPCs more memorable, helping Keepers bring fresh horrors to their campaigns.

Revised investigator sheets, Pulp Cthulhu hero sheets, and a variety of other play aids round out the collection.

The book includes three new scenarios designed to showcase its rules options and provide adventures for different groups.

• Little Miracles: A beginner-friendly scenario set near Arkham, where investigators must look into the disappearance of a Miskatonic University professor.
• If I Had a Hammer: An ordinary Friday night at home takes a terrifying turn, transforming a comfortable evening into a nightmare.
• What a Puzzler!: An investigative scenario built around the latest fad for jigsaw puzzles, offering Keepers another opportunity to introduce unsettling mysteries.

Each scenario includes maps and handouts to help bring the investigation to the tabletop.