The Cthulhu Casebook

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Front Cover

Publisher: Chaosium

Product Code: 3305

Publishing Year: 1990

Pages: 140

Cover Price: $19.95

Author(s): William A. Barton, M.B. Willner, William Hamblin, John Scott Clegg, Randy McCall, Elizabeth A. Wolcott, Mark Harmon, John B. Monroe, David A. Hargrave, Keith Herber, Sandy Petersen

Artist(s): Nick Smith, Tom Sullivan, Lisa A. Free, Arnie Swekel, Sherman Kahn (maps), Charlie Krank, Yurek Chodak

Setting(s): 1920s

Format(s): Softcover


Scenarios: The Auction, The Madman, Black Devil Mountain, The Asylum, The Mauretania, Gate from the Past, Westchester House, The Curse of Chaugnar Faugn, Thoth's Dagger (Scenario)

Articles: The Ten Commandments of Cthulhu Hunting, Sinister Seeds, Death Reports

Additional: Introduction, Player Handouts, Insta-Plots

Front Cover Text

A Plethora of Plots and Adventures

Back Cover Text

Cthulhu Casebook

Nine Sanity-Reducing Adventure; Four Background Articles; Eight Full-Color Plates.

"On April 12th the derelict was sighted; and thought apparently deserted, was found upon boarding to contain one survivor in a half-delerious condition and one man who had been dead for more than a week. The living man was clutching a horrible stone idol of unknown origin.... " -- H.P. Lovecraft


A new exciting adventure program catering to the most discriminating tastes has just been announced!

  • Travel the seas in the unrivalled splendor of the Mauretania – sister ship to the Lusitania – and one of the two largest, fastest, and most luxurious ships afloat.
  • Visit such diverse and exciting locales as historic Vienna; fashionable New York City: bohemian San Francisco; mysterious Cairo; the rugged coasts of northeast Maine.
  • Battle strange creatures from Earth's distant past!
  • Troubled? Seek asylum from your worries at the comforting Greenwood estate, where a professional staff tends you every (imagined) need.

Meet new friends, engage in lively discussion, see unusual sights. Enjoy an experience unlike any you’ve had before!

The Cthulhu Casebook contains nine independent adventures set in the 1920s, plus numerous articles and aids generating many other plots.

Certain portions of this book are easily included in ongoing tales – "The Mauretania" can expand any ocean voyage; "The Asylum" can make exciting an otherwise uneventful institutionalisation; "The Auction" can be used to introduce various artefacts to aid or hinder the investigators.

Other sections contain full independent adventures playable by themselves or useful in filling gaps between campaigns or as subplots within current story lines.

Comments / Trivia

Some of the adventures originally appeared in Curse of the Chthonians and The Asylum and Other Tales. 'Death Reports' was based on the article 'Death Scenes', by Sandy Petersen which appeared in Different Worlds Magazine #35 pages 14-15. 'Thoth's Dagger', by William Hamblin originally appeared in Different Worlds Magazine #27 pages 23-34.

Includes eight colour plates.

Winner of the 1991 Gamer’s Choice Award for Best Role Playing Adventure.


Spoilers - Keepers Eyes Only

Players should not read any further.

Comment here to Keepers about this book. Comments on specific Scenarios and Campaigns go on their respective pages. Keep DISCUSSION on the talk page.