null Sprites

Canis Mysterium - PDF

Full Star Full Star Full Star Full Star Full Star (2 reviews) Write a Review

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.

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.

THIS IS A DOWNLOADABLE BOOK. By Scott Haartman. 32 pages, with handouts. 8.5 x 11" watermarked PDF with cover images.

ISBN/EAN: 9781568823843

Play online with our Licensed Partners

Do you play on a Virtual Tabletop? Our partners offer products for playing this scenario online.

Product Configuration

Physical Product Settings

Is Physical Product: [N]
Has Inventory: [Y]
United States: [Y]
United Kingdom: [Y]
Europe: [Y]
Australia: [Y]
Canada: [N]

Is PDF Available: [Y]
PDF Product Name: [Canis Mysterium - PDF]
PDF Product Link: [[/canis-mysterium/]

PDF Settings

Has Physical Product: [Y]
Is Physical Available: [Y]
Physical Product Name: [Canis Mysterium]
Physical Product Link: [/canis-mysterium/]

Product Footer

Footer Name:[ChaosBrandClassicCthulhu]

6th Edition Call of Cthulhu
Digital PDF
Page Count:
Scott Haartman
Cover Artist:
Colin Nitta
Interior Artists:
Eric York
  • Full Star Full Star Full Star Full Star Full Star 5
    Character driven story

    Posted by Rick Smith on 1st Apr 2023

    I bought this at Drive Thru RPG. I was very impressed by this scenario. It had strong, sympathetic characters, cops that were competent, and a believable problem. The scenario uses the mythos used with a light touch which is a great change of pace from many adventures. The author has done a great job of making the big fight SEEM really dangerous, but it is not, which is ideal for starting players. Strongly recommended. Warm regards, Rick.

  • Full Star Full Star Full Star Full Star Empty Star 4
    Good with some shortness

    Posted by Bobby on 17th Mar 2017

    This is a good starter for any GM wanting to get into the Call of Cthulhu rpg 7e and shows a gentle approach on how to GM a game successfully and continue the story with an imagination of your own. However, this campaign is very short. It is expected with the small price for the story itself, but only includes the bare minimum to get a story started or maybe a two to three session overall gameplay (maybe to give the GM some rest? or to take a lesuirely break from running and fighting the unknown). Overall it is a good story with nice characters with some given dimension, that can be milked as much as possible, but a very very very anticlimactic ending.