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Mansions of Madness

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Six Classic Explorations of the Unknown, 
the Deserted, and the Insane

IN DIM, FORGOTTEN RECESSES of the world lurk mind-twisting horrors. Through the use of human agents these horrors work to thwart mankind’s destiny.

However, not all of these human agents are willing partners. Many times have the monsters resorted to subtlety and intrigue to further their ends, rather than gross displays of sheer destruction.

Andrew Keetling is one such unwilling agent. A sucessful Boston businessman, he has disappeared — held captive in a mansion of madness.

MANSIONS OF MADNESS is a collection of six independent tales for Call of Cthulhu. Set in the 1920s and of varying length and complexity, these adventures can be planted into an ongoing campaign as the keeper sees fit. Some can be played in a single night, others will require several evenings to complete. They can readily be used as plot twists, interesting diversions, or red herrings.

Mister Corbitt - In which the investigators get to know their neighbor and his family a little better than they would like.

The Plantation - In which the investigators search out the secrets of a swamp in the Deep South, and descend into the lair of a being of passive disposition, but exhibiting an insatiable hunger.

The Crack’ d and Crook’ d Manse - In which the investigators explore the usual sinister house, only to find a distinctly unusual resident.

The Sanatorium - A few days visit with an old friend on an offshore island seems like the ideal way to relax, but not all vacations turn out as one would wish.

Mansion of Madness - Wherein the investigators visit the house of a wealthy art collector, and find his collection of paintings to be odd but intriguing. Do they offer a hint of things to come?

The Old Damned House - The investigators are hired to recover the famous Hazard Pearls. Were they really stolen, or are there more sinister truths to be discovered?

Experience it with 7th Edition Call of Cthulhu. Get the rulebook here.

Free conversion guidelines.

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Reviews (3)
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Michael H. [Featured Reviewer]
June 19th, 2012
As might be expected based on the title, each of these investigations centers around a mansion although there is quite a bit of variety in terms of what exactly the adventure entails – these are simply five different, Scooby Doo haunted houses. [...]
April 2nd, 2010
This is another older supplement for "Call of Cthulhu," originally produced in 1990. Basically there are five separate scenarios, one of which is loosely based on the original "Corbitt" scenario from the rulebook (probably the most- [...]
October 25th, 2008
A very good collection of COC adventures, in fact, I reckon, one of the best. Very investigative and atmospheric in the theme of creepy mansions and haunted houses.... [...]
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File Last Updated:
July 12, 2010
This title was added to our catalog on December 03, 2004.