null Sprites

Reign of Terror - PDF

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

Mythos Horrors during the French Revolution!

Chaosium Unveiled: Inside The Reign of Terror

Watch the unveiling video to see the book for yourself. Remember that you get the PDF when getting the physical copy.

Image of a pope without a skin

Reign of Terror is an epic two-part historical scenario, set during the French Revolution, playable as a stand-alone adventure or as an historical interlude for use with Chaosium’s premium campaign Horror on the Orient Express.

“The blade is poised, a shining length of bright sharp steel. The light glints on a small pattern on the blade, a concentric circle. The crowd holds its collective breath. Time stands still for an instant, and then the blade falls…”

A time of struggle, intrigue, and horror. A divided country, where the upper class enjoys the bounty of wealth, and the poor cannot afford a loaf of bread. Where the cries of anger and rage at life’s injustices find momentum, sparking the people to unite and cast away the old regime for a brighter and more hopeful tomorrow. In time, hope will be replaced with fear as The Terror descends upon France, and the guillotine cries out for blood.

The crowds gather baying for blood, while the “chop-chop-chop” of the guillotine calls out…

Developed by Call of Cthulhu mastermind Mark Morrison as a secret chapter in the story of Horror on the Orient Express, Reign of Terror has been designed for play with or without reference to that campaign. If used with Horror on the Orient Express, it provides an exciting and action-packed “living handout” that brings new insights and illuminates the players into the full horror of one of the campaign’s dire villains.

Part One, set in 1789 amid the stirrings of the revolution, sees the investigators descend into the catacombs of Paris and brave the tribulations of courtly life, where debauchery and wickedness bring their own terrors.

Part Two, set during The Terror, catapults the investigators into a conspiracy, where spies and agents seek out those who would destabilize the new regime. Caught amongst the chaos and dangers of Paris, the way must be found to stop a nightmare that would plunge France and the rest of Europe into darkness.

“Meat is a luxury for many. Butchers slaughter beasts in the courtyards behind their shops; the blood flows out into the streets. The better cuts go to the wealthy while poorer Parisians eat mutton, sausages, offal, and salted pork.”

This book provides a stand-alone setting, with a plethora of historical details to help the Keeper bring Paris and the French Revolution to life. Profusely illustrated throughout, with detailed maps of Paris, the Palace of Versailles, and more! Alongside the two-part scenario of Reign of Terror is a range of scenario seeds, each providing roots for extending play and building a longer, more in-depth campaign.


“I saw only narrow, dirty, and foul-smelling streets, and villainous black houses, with an air of unhealthiness; beggars, poverty; wagons-drivers, menders of old garments; and vendors of tea and old hats…”
—Jean-Jacques Rousseau

Map of Paris 1789-1794

Further supporting the timeframe, the Keeper is provided with a full timeline for the French Revolution, from May 1789 to July 1794, as well as a detailed bibliography of books, films, websites, and graphic novels for further research and inspiration.

Liberty! Equality! Fraternity!

Whether choosing to play Reign of Terror as part of Horror on the Orient Express or as a stand alone scenario, its twisting plot, dire threats, and enthralling streets of Paris (to say nothing of the horrors within the catacombs!) will keep your gaming group entertained for multiple play sessions.


Downloads for this Product

For use with both options of play are six ready-to-use pre-generated soldier investigators, each detailed with their statistics and motivations.

Also, for those wishing to create their own characters and further explore the setting, are ten era-specific investigator occupations, including cleric, noble, and peasant, as well as guidance on social class, income, and weapons of the period.

Pregenerated Investigators
Blank Character Sheet
Women of the French Revolution
Women of the French Revolution is free 11 page downloadable resource to use with Call of Cthulhu's historical supplement Reign of Terror by Kelly Grant.

Play online with our Licensed Partners

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

Watch Live Play: Reign of Terror

Curious about the scenarios? Watch the Live Play on the Stream of Chaos

What The Critics Say


  • "Morrison’s love for this work shines through, and a reader easily recognizes the care and painstaking attention he and his team spent on this project… (There are) times when the players — the actual players — will want to run screaming from the room. It’s scary and it’s creepy and it’s gross and it will definitely give your more impressionable players nightmares. Just like it ought to."

    — Reckoning of the Dead, Reign of Terror Review.

  • "I very strongly recommend Reign of Terror... If I were to use a single word to describe most of the encounters and scenes of the adventure, that word would be 'disturbing'... In the context of a horror scenario which reaches into supernatural paranoia, this is the highest praise possible."

    — Antonio S., RPGNet Review.

  • "I certainly can see why REIGN OF TERROR is an award winner... Highly recommended: 9 out of 10!"

    — The Gaming Gang, Reign of Terror Page Through.

  • "This hardcover adventure is not just about an unusual time but also an unusual antagonist... The two adventures here stand alone but they can also be used as an expansion to the massive Horror On The Orient Express campaign to give the investigators more insight into one of the villains."

    — Forbes, Fight Cthulhu Across Time and Space on your Tabletop.

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: [RuneQuest: Roleplaying in Glorantha - PDF]
PDF Product Link: [/call-of-cthulhu-keeper-rulebook-7th-ed-hardcover/]

PDF Settings

Has Physical Product: [Y]
Is Physical Available: [Y]
Physical Product Name: [Reign of Terror - Hardcover]
Physical Product Link: [/reign-of-terror-hardcover/]

Product Footer

Footer Name:[ChaosBrandCthulhu]

7th Edtion
Page Count:
Mark Morrison, Penelope Love, James Coquillat, Darren Watson
Front Cover and Interior Art:
Victor Leza
Back Cover Art:
Delphes Desvoivres and Denys Corel
Steph McAlea and Oliver Sanfilippo
  • Full Star Full Star Full Star Full Star Empty Star 4

    Posted by Mateusz Charytoniuk on 14th Jul 2023

    Too short. Despite the fact that the book has 130 pages it took about 8 hours of gameplay to complete. It has too many details about the setting, illustrations, historical notes (too much padding overall) and too little of the actual plot and gameplay material. I would buy it only if your group yearns for more lore related to the "Horror on the Orient Express", not for the scenario itself

  • Full Star Full Star Full Star Full Star Full Star 5
    The Music From Beyond

    Posted by Matthew A. on 24th Jan 2021

    Our gaming group really enjoyed this historical scenario set during the French Revolution. Part One ties directly into the Horror on the Orient Express campaign, and Part Two is partially inspired by H.P. Lovecraft's short story, "The Music of Erich Zann." Highly recommended, either as a prelude (or interlude) to the full Horror on the Orient Express mega-campaign, or a stand-alone campaign set in 18th century Europe.