Canis Mysterium

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A Scenario With Bite

Constable Clark of Coldwater Falls, was desperate for attention. He’d been in touch with every sanatorium and hospital from New York to Boston and there’s not an empty bed to be found since the stock market crash last year. They’re full to brimming with suicidal businessmen and investors. He’s holding a man in his jail exhibiting some rather... extraordinary behaviors. The delusion is complete and total — he walks on all fours and he won’t speak a word. They say he even eats out of a bowl and refuses utensils! Not a shred of human behavior left in him.

The man attacked a young girl before he was discovered. He was found... well.. gnawing on part of her leg!

Canis Mysterium is an adventure scenario for the Call of Cthulhu™ roleplaying system designed to be played in one or more gaming sessions. This scenario is suitable as an introduction to a new campaign or can easily be worked into an established storyline. As written, this adventure is set in and near Arkham of October of 1930, making Chaosium’s H.P. Lovecraft's Arkham supplement particularly helpful.

Several scenario seeds are offered to keepers who wish to expand and continue the events in this adventure, perhaps giving birth to a new campaign or providing handy subplot sessions to pre-existing campaigns.

By Scott Haartman. 32 pages, with handouts. 8.5 x 11" saddle-stapeled paperback.

ISBN-10: 1568823843

What the Critics Say

"The adventure reads very well and is easy to understand, plan and execute… a neat introduction to the Mythos where things start almost normal and turn out horrific."—Antonios S. review, RPGNet.

"…intriguing and unusual… I can definitely recommend Canis Mysterium as it’s well written and a lot of fun."—Diehard Gamefan.

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PDF Product Name: [Canis Mysterium - PDF]
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6th Edition Call of Cthulhu
Black & White interior with Color Softcover
Page Count:
Scott Haartman
Cover Artist:
Colin Nitta
Interior Artists:
Eric York
  • 4
    Not a 7th Edition Supplement

    Posted by David Sastre on 18th Jul 2018

    I enjoyed this adventure, but it is not 7th edition. I had to do all the conversions myself. If that isn't something you want to do, you might want to reconsider buying it.