Call of Cthulhu: 7th Edition - Cthulhu by Gaslight: Keepers' Guide

The gas lamps flicker. The fog rolls in. And something ancient stirs beneath the streets of Victorian London.

Welcome to the dark side of the 1890s! Cthulhu by Gaslight: Keepers' Guide transports your Call of Cthulhu campaign to the shadowy streets of Victorian-era Britain, where occult societies gather in secret, sinister organizations pursue forbidden knowledge, and cosmic horrors lurk just beyond the limits of human understanding.

Designed for Keepers—the storytellers who guide investigators through the unknown—this comprehensive guide provides everything you need to bring the Gaslight era to life. Blend historical atmosphere, Gothic mystery, and Lovecraftian horror into unforgettable investigations where even the most respectable gentleman or esteemed society may conceal a terrible secret.

Inside, you'll discover:

• A World by Gaslight: Extensive guidance for creating immersive adventures in 1890s Britain, complete with historical details and atmospheric inspiration.

• The Gazetteer of Fear: More than 100 locations across Britain and beyond, ready to inspire investigations, encounters, and sinister discoveries.

• Occult Societies and Secret Organizations: Explore mysterious groups, including the Hermetic Order of the Golden Dawn, and uncover the dangerous ambitions hidden behind their rituals.

• New Mythos Horrors: Discover monsters and supernatural threats unique to the Gaslight era.

• Expanded Rules and Occult Knowledge: Introduce new skills, forbidden tomes, spells, and rules for combat on the astral plane.

• Two Introductory Scenarios: Run The Forby Masterwork, a mystery involving a cursed family and a lost gem, or Oranges & Lemons, a disturbing investigation into a gruesome death in London's impoverished East End.

• Scenario Seeds: Use a wealth of story prompts to create original mysteries and develop your own Gaslight campaigns.

Whether your investigators are pursuing a trail of occult murders, infiltrating secret societies, or uncovering horrors hidden beneath the respectable surface of Victorian society, this guide provides the tools to make every revelation unsettling and every shadow suspicious.

In an age of scientific discovery and imperial ambition, humanity's greatest discoveries may be its most terrible mistakes.

Light your lantern, ready your notes, and prepare to investigate the horrors lurking beyond the gaslight.

Product details: Full-color hardcover • 266 pages • Chaosium

Designed for Call of Cthulhu 7th Edition. The Cthulhu by Gaslight setting can be played using the Investigator's Guide and Keepers' Guide together.