Arkham Horror: The Roleplaying Game - Bestiary: The Thompson Files

Compiled by Mandy Thompson—an esteemed researcher known for her obsession with the arcane—the book gathers firsthand accounts from investigators who have faced unspeakable horrors. Each chapter combines gripping stories, practical Game Masters advice, and detailed monster profiles, enriched by Mandy’s annotated notes. Whether you’re seeking narrative depth, creative inspiration, or terrifying foes, this expansion delivers a compelling and original toolset for enhancing any Arkham Horror RPG campaign.

A NARRATIVE APPROACH TO ELDRITCH HORRORS: Enhance your Arkham Horror RPG experience with this unique sourcebook that blends atmospheric storytelling with essential game mechanics, serving as both an immersive field guide and a thematic expansion for your campaigns.

RICH 96-PAGE HARDCOVER EXPANSION: Compiled by Mandy Thompson, this detailed book features firsthand investigator accounts, annotated research notes, and comprehensive monster profiles to bring the arcane threats of Arkham to life.

PRACTICAL GAME MASTER ADVICE: Empower your storytelling with dedicated GM tools and creative inspiration designed to deepen the narrative stakes, offering new ways to introduce terrifying foes and arcane mysteries to your tabletop.

ELEVATE YOUR HORROR CAMPAIGNS: Perfect for intense weekly roleplaying sessions, dark winter evenings, or themed Halloween gaming events; this expansion provides the dark inspiration needed to keep your players on the edge of their seats.