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Rivers of London: The Roleplaying Game
by Chaosium

The Rivers of London: the Roleplaying Game core book contains everything you need to start exploring Ben Aaronovitch's magical version of London.

Rivers of London: The Roleplaying Game
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The People of the Monolith

The People of the Monolith


Young poet Justin Geoffrey has returned from Europe, his trembling hands clutching a collection of poems of such vivid imagery that many question whether they could truly be written by the same man who produced Geoffrey's earlier works! Publishers move quickly to bring these new works to print while their notoriety is at its peak, but they need more to enhance their product. They need provenance....   [click here for more]
Chaosium  $5.00

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A Lone Collection

A Lone Collection


After thwarting a theft on the streets of 1890s Chicago, an old gentleman offers you a job of guarding his collection of strange artifacts while he is away. As the guard, your choices lead to mystery, mythos, magic, and even death while guarding... A Lone Collection. Content Warning: solo rpg adventure -- meant for one player or one player and a Keeper. Secondary Content Warning:...   [click here for more]
Chaosium  $4.99

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The Unspeakable Oath 18

The Unspeakable Oath 18


The infamous magazine of Cthulhu Mythos gaming returns!  The Unspeakable Oath is a quarterly magazine dedicated to tabletop roleplaying games that are based on the Cthulhu Mythos -- the creations of horror author H.P. Lovecraft, the writers who inspired him, and the writers who followed him. Created and published by game designers, writers and artists who love Cthulhu Mythos gaming, every...   [click here for more]
Arc Dream Publishing  $5.99

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A Colour in a Dark Age

A Colour in a Dark Age


Europe in the Middle Ages. Dark lands swept by ignorence, fear, and superstition. This Medieval scenario for 7th Edition Call of Cthulhu plunges the players into the wild forests of Germany where they will encounter warring factions, occult practices, religious persecution, and an other-worldly infestation. The players are travelers in the forested wilderness of 10th century Germany. They must get...   [click here for more]
Chaosium  $0.99

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The Blasphemous Tome 6

The Blasphemous Tome 6


The Blasphemous Tome is the semi-annual fanzine that we create for Patreon backers of The Good Friends of Jackson Elias podcast. It contains articles about RPGs, horror films and weird fiction, not to mention plenty of sanity-blasting artwork and original content for the Call of Cthulhu roleplaying game. Please read the 'Please Note' below before purchasing. Featured in this issue...   [click here for more]
Chaosium  $50.00

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TRUDVANG CHRONICLES: Player’s Handbook

TRUDVANG CHRONICLES: Player’s Handbook


TRUDVANG CHRONICLES Player's Handbook   The Player’s Handbook for Trudvang Chronicles includes the rules and inspiration for players to create and play with their characters in the Trudvang universe. The book is the essential reference for all players and contain rules for character creation, skills, holy powers, magic and much more. Players Handbook is the book dedicated for the...   [click here for more]
CMON  $20.00 $5.00

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Call of Cthulhu: The Coloring Book

Call of Cthulhu: The Coloring Book


28 Eldritch Scenes of Lovecraftian Horror for You to Color! Enjoy coloring an amazing array of scenes, with striking images from H.P. Lovecraft’s stories­—and the Call of Cthulhu RPG his imagination inspired (Horror on the Orient ExpressMasks of NyarlathotepThe Fungi from Yuggoth and more). ...   [click here for more]
Chaosium  $4.95

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The Mist Sower - a Zgrozy scenario

The Mist Sower - a Zgrozy scenario


Vranitzky has long been an arrogant genius, a man of great passion and an even greater ego, bordering on the messiah complex. He was certain his art is the only thing that can give voice to wounds dealt to humanity by the Great War. He devoted all his time to creating expressionistic, grotesque paintings exaggerating the War’s catastrophes and looking for inspiration – drastic photos, tales,...   [click here for more]
Chaosium  $6.99

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The Book of Nonterraqueous - A Modern Era Call of Cthulhu Scenario

The Book of Nonterraqueous - A Modern Era Call of Cthulhu Scenario


It was supposed to be a simple job: collect a book from a wealthy woman’s contact. Other forces covet the book, however, and the investigators find themselves in grave danger as the simple collection job becomes something far more sinister. Are their lives and sanity worth the price of completing the task? Will they betray the woman who hired them or stay loyal throughout the sinister events?...   [click here for more]
Stygian Fox  $4.95

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The Terror in the Tapestry

The Terror in the Tapestry


It's a stolen tapestry, it was probably just some angry monk that swiped it, right? The Terror in the Tapestry is a Cthulhu Dark Ages adventure set in the monastery of St. Swithun near the town of Totburh. After the idyllic calm of the monastery is violated by a brazen theft in the middle of the night, the monks of St. Swithun ask the investigators to help find their stolen...   [click here for more]
Chaosium  $2.99

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Pulp Cthulhu: Heroes' New Talents!

Pulp Cthulhu: Heroes' New Talents!


Welcome! In this supplement for the Pulp Cthulhu game 24 new talents can be found, useful both for players to create different heroes or for Keepers in order to add strange, dangerous NPCs to their scenarios! Including: Merfolk, Fakir, Thug, Tamer, Insanely Robust, Unbroken, Metal Detector, Polymath, Combat Medic, Artificer, Judge, Fast Recovery,...   [click here for more]
Chaosium  $0.66

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The Heat

The Heat


The recent heat wave has made the citizens of Kingsport weary, tired and annoyed. Extremely annoyed. When a pair of upstanding citizens is arrested for assault, their son decides to start an investigation to clear their name. Following the breadcrumbs may lead the investigators to discover a different kid of family... This short Call of Cthulhu adventure is set in Kingsport of 1921. The...   [click here for more]
Chaosium  $1.00

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The Secret of Silcestre

The Secret of Silcestre


SOMETHING IS WRONG IN THE VILLAGE OF SILCESTRE The tiny village of Silcestre (Sil-chester) stands on part of the old Roman town of Calleva Atrebatum that was important in its time, nearly 500 years before. Unlike other villages built on old Roman towns, Silcestre is of newer construction. The villagers hide in their houses when nightfall comes, but not even that is always enough to protect them. Silcestre...   [click here for more]
Chaosium  $4.99

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Isle of Madness

Isle of Madness


Isle of Madness is a hair raising 1930's Pulp Cthulhu scenario taking place on a secret island hidden in the North Atlantic Ocean—an island occupied by terrible fish-man amalgams, referred to as devilfish due to their strange red coloring, and a mad scientist intent on mastery of everything below the surface of the seas. This is a short scenario suitable for up to six players. This scenario can...   [click here for more]
Chaosium  $1.99

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The Blasphemous Tome 5B

The Blasphemous Tome 5B


The Blasphemous Tome is the semi-annual fanzine that we create for Patreon backers of The Good Friends of Jackson Elias podcast. It contains articles about RPGs, horror films and weird fiction, not to mention plenty of sanity-blasting artwork and original content for the Call of Cthulhu roleplaying game. Please read the 'Please Note' below before purchasing. Featured in this issue...   [click here for more]
Chaosium  $50.00

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A Night at the Opera

A Night at the Opera


A weekend long party featuring an opera never before performed in England, and you are invited.  A fine way to start the social season, this event will no doubt be all they talk about in London. Granted, our host is an eccentric man; with curious tastes that some scoundrels would call depraved.  His gardens; his art collection, and his library will certainly be worth exploring.  Of course, there...   [click here for more]
Chaosium  $6.95

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The Prepared Investigator

The Prepared Investigator


Ever struggle over the motivations for your character? Where you fit in alignment or whether those traits, passions, or character quirks fit the character you want to play? On these pages is a checklist for you to print and use at your gaming table to help you realise your most important aspects of your P.C. Simply use the charts contained within to flesh out the personality of your role-playing character...   [click here for more]
Chaosium  $2.99

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100 Books to Find in Miskatonic Country

100 Books to Find in Miskatonic Country


This is a selection of 100 books that could be found in or about Miskatonic Country, namely Arkham, Kingsport, Dunwich and Innsmouth, or the New England region around them. The books would be small print and are assumed to have been printed in the 1920s or earlier. They may have been reprinted at later periods, in which cases the names of some will have changed, as indicated. The books cover specific...   [click here for more]
Chaosium  $1.49

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Mad Sci - How to Train your Shoggoth

Mad Sci - How to Train your Shoggoth


It's campus chaos at Miskatonic University! Tess Alvitr is a Norwegian exchange student that has come to Miskatonic University to get her Doctorate of Synthetic Biology. Little did she know that the sinister forces which stalk this place would be her undoing. Vincent Pollo is not really Vincent Pollo, but a rogue Yithian who has broken with protocol and defied his brethren by "dropping in" to a human...   [click here for more]
Chaosium  Pay What You Want

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Secrets of Tibet

Secrets of Tibet


TIBET is a common term used in the western world to refer to a remote plateau situated north of the Himalayan mountain range in Asia. A land of high-altitude peaks, some areas are impossible to reach without modern technology. The land is populated with malevolent gods and monsters, and deep secrets lie sleeping in ancient tombs and vaults among Tibet s soaring mountains and deep valleys.  Geologists...   [click here for more]
Chaosium  $15.37 $11.99

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Season of growth

Season of growth


A short one-shot I made for halloween. It's for a keeper and an investigator (pregen is included). Set in the middle 90s where technology was not as advanced as now, a photographer is sent to the country to find out more about the , supposedly, oldest tree in the US..or even in the whole world! Lots of sanity loss and an interesting story. Hope your player will enjoy it as much as my player did....   [click here for more]
Chaosium  $1.50

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Beyond the Mountains of Madness

Beyond the Mountains of Madness


An Epic Antarctic Campaign & Sourcebook Little by little they rose grimly into the western sky; allowing us to witness the various bare, bleak, and blackened summits . . . in the reddish Antarctic lights against the provocative background of iridescent ice-dust clouds. In the whole spectacle there was a persistent, pervasive hint of stupendous secrecy and potential revelation. . . . I could...   [click here for more]
Chaosium  $19.99

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Fioracitta

Fioracitta


From a distance, the city shines so brilliantly that you never see the darkness until it is too late to walk away. Her streets are ancient, yet she bristles with the new. She charges the world for what she offers; but for what she offers, you’d sell her both your eyes. The city is Fioracitta, the Heart of Power. And she welcomes all visitors with open arms. This supplement for Mythras...   [click here for more]
Design Mechanism  $15.99

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1920s Investigator's Companion

1920s Investigator's Companion


An Essential Guide for Players When faced with the horrors of the Cthulhu Mythos, investigators need all the help that they can get. This essential player's aid for Call of Cthulhu provides it. The 1920s Investigator's Companionis split into four sections. "The Roaring Twenties" details life in the 1920s, from a general historical overview to listing of favorite songs, books, and films...   [click here for more]
Chaosium  $8.99

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Sun Spots

Sun Spots


Boston, February 1926. In the midst of a cold winter storm, a prominent local banker hires the investigators to travel to a local mountain resort to rescue his daughter from the unusual churches that have taken over the town. But the man's strange suntan hides a more disturbing mystery. Sun Spots is a horror RPG scenario set in 1920s New England for 3-6 players that takes between 8-10 hours to play....   [click here for more]
Weird 8  $9.99

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The Light At The End

The Light At The End


A mystery of derangement and betrayal beckons investigators to 1920’s Arkham. The investigators are sought out by a group of scriveners, book-binders, and historians to locate an old, valuable collection of papers. The documents are said to have disappeared years ago, last seen in the hands of a madman. The pleas of a desperate wife, as well as the promise of rich rewards press the investigators...   [click here for more]
Chaosium  $4.95

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Devilarium: Thornen Servant - a Zgrozy supplement

Devilarium: Thornen Servant - a Zgrozy supplement


Thornen Servant is an independent supplement for Call of Cthulhu 7th edition. By default, it takes place in the 1920s' but it can easily be adapted to other eras. Inside you’ll find: A detailed description of Caorn's Taint, an accursed disease plaguing those who seek forbidden knowledge An examination of the monstrous thornen servants, manifestations of an entity known as the Lord on the...   [click here for more]
Chaosium  $2.99

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The Seraphim Club: An Original Heroic Organization for Pulp Cthulhu and Call of Cthulhu

The Seraphim Club: An Original Heroic Organization for Pulp Cthulhu and Call of Cthulhu


This guide details an original heroic organization known as the Seraphim Club, a secret society with ties to the Vatican dedicated to recovering holy artifacts and relics in danger of falling into the hands of evil. With five pregenerated characters and detailed background and history, this guide is a perfect supplement for your Pulp Cthulhu or Call of Cthulhu game. The story begins in 1917 as...   [click here for more]
Chaosium  $2.00

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The Worm of Wall Street

The Worm of Wall Street


Something unclean is infesting Wall Street... New York financial markets have just experienced a disastrous flash crash, losing billions of dollars of value in an instant. From irate regulators to ruined speculators, no one knows why. Yet amid the carnage, a single hedge fund and its charismatic, bizarre founder stand proud, reaping rewards while others are crumbling all around them. Now, an intrepid...   [click here for more]
Chaosium  $2.95

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Crossing Guard

Crossing Guard


Oddball mythvestigators gathered by eccentric lore expert Mr. Ed use conventions to disguise their exploration of mythos rumors. In June 2023, they meet under cover of RageCon in Reno, Nevada by day and hunt for a cemetery-lurking mythos creature by night. Content warning: drug use, mental illness, ghosts, inappropriate humor 6 pregenerated characters 5 NPCs 6 player handouts 1 map...   [click here for more]
Chaosium  $4.99

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Convicts & Cthulhu

Convicts & Cthulhu


Cosmic Horror. Fuelled by Human Cruelty and Depravity. ◊ The prison colonies of 18th and 19th Century Australia are justly feared throughout the British Empire as places of unparalleled suffering and torment. The refuse of the Empire are sent here to serve out prison terms in a land half a world away from “civilisation”. A world that, to European eyes, seems thoroughly alien. ◊ But, few among...   [click here for more]
Cthulhu Reborn  Pay What You Want

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100 Rumours to Hear in Miskatonic Country

100 Rumours to Hear in Miskatonic Country


This is a collection of 100 rumours that investigators could hear in Miskatonic Country, specifically the towns of Arkham and Kingsport. The rumours assume that the 1920s is the setting used, though with tweaking some could be used in other periods. Whether or not a particular rumour is true or not is up to the Keeper. They could be used as a source of potential adventure hooks, as the rumours could...   [click here for more]
Chaosium  $1.79

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Delta Green: Targets of Opportunity

Delta Green: Targets of Opportunity


THE APOCALYPSE IS HERE The men and women of Delta Green have pursued alien threats and supernatural horrors around the globe. They think they’re saving the world from horrific evil. But are they just saving it for something worse. Delta Green: Targets of Opportunity is a conglomeration of evils, many of them whispered in hints and rumors since the earliest days of Delta Green. BLACK COD...   [click here for more]
Pagan Publishing  $19.99

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Gaslight Gurglings

Gaslight Gurglings


A Mad Miscellany of facts and tips for running Call of Cthulhu 7th edition in an 1890's British setting. A compendium of snippets of information which I have found useful over some years of running and writing Call of Cthulhu games for the Gaslight era. 20 pages, almost entirely text - a feast of information. ...   [click here for more]
Chaosium  $1.26

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Post Card - Peru - Masks of Nyarlathotep

Post Card - Peru - Masks of Nyarlathotep


This appendix is a collection of graphics ready for use in the Peru chapter. You can also use them for another campaign or adventure taking place in this country. Masks of Nyarlathotep is a complete revision and updating of this epic multi-part campaign set in 1925, in which steadfast investigators must unravel secrets and battle the minions of darkness in an attempt to stop world-shattering...   [click here for more]
Chaosium  $2.00

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Walk Among Us

Walk Among Us


A family man without a soul. A murderer on the loose. And mosquitos everywhere. Investigators, Welcome to New Orleans! A scenario where investigators will have to solve a cold case which will lead them in the deep of the bayou! There, only horror awaits them. 4 pre-generated characters are included along with a map for the player and a map for the keeper. ...   [click here for more]
Chaosium  $1.00

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Art for New York - Masks of Nyarlathotep

Art for New York - Masks of Nyarlathotep


This is a set of 28 graphics to be used in the campaign - New York Chapter. ...   [click here for more]
Chaosium  $3.00

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Along came a crystal

Along came a crystal


‘Along came a crystal’ is a classic 1920s era scenario for use with 7th edition Call of Cthulhu. After a geology expedition disappeared, a group of investigators are gathered to find what happened. The expedition’s fate will shatter their minds, as they will face an impossible adversary. This scenario is made for 2-4 players, and it can be run in a single session. It...   [click here for more]
Chaosium  $3.00

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Art of England - Masks of Nyarlathotep

Art of England - Masks of Nyarlathotep


This is a set of 12 graphics to be used in the campaign - England Chapter. ...   [click here for more]
Chaosium  $1.00

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The Scream of the Mandrake

The Scream of the Mandrake


"A country estate in England, and a champagne gala. What more idyllic setting could there be for Lord Montague's glorious pinepple harvest. In the dark corners of the estate, something has gone wrong. Blood, bone, and dirt await as does the Scream of the Mandrake!" Brought to you by award-winning Chaosium licensee, Type40, The Scream of the Mandrake is the tenth Call of Cthulhu adventure in the...   [click here for more]
Chaosium  $8.99 $4.99

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Autopsy

Autopsy


A 4 hour morally grey, investigation heavy scenario for 1-3 players, set during the 1920s. It is 1921, and you have recently been enrolled at Shaw University, a cloistered, and exclusive place of learning in the Boston area, with limited spaces, high standards, and ruthless competition among the students. Only one week in, and you are starting to...   [click here for more]
Chaosium  $4.75

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A Place Just For Us

A Place Just For Us


When do we put aside the things from our childhood? The people, places, games, and secrets? This one-shot adventure unfolds in the fictional town of Twin Rivers, over the course of a few fateful summer nights. A group of reunited friends find the ashes of their old school, and soon learn that a mysterious figure from their past may be stalking the woods near their home, waiting to ensnare them in a...   [click here for more]
Chaosium  $5.49

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The Taos Hum

The Taos Hum


The Taos Hum A Hudson & Brand Abroad! Adventure A strange background hum starts to affect the non-native residents of Taos City, in the New Mexico Territory. A respected professor, intrigued by the seemingly localized aural affliction, sends a telegram to the investigators, asking for their help in uncovering the source. Conflicting stories, a trio of conspirators, and a cultural divide will complicate...   [click here for more]
Stygian Fox  $9.95

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His Master's Voice

His Master's Voice


"There is a voice in the current!" Set in September 1925, this scenario takes place near Millers Falls, Massachusetts and the fictional community of Shadwell. A community of patients who have been transformed by an experimental electrical therapy and live in a mothballed cannery are trying to bring about the second coming in a soon to be electrically powered mechanical body. An escapee from the community...   [click here for more]
Chaosium  $4.99

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Art of Egypt- Masks of Nyarlathotep

Art of Egypt- Masks of Nyarlathotep


This is a set of 24 graphics to be used in the campaign - England Chapter. ...   [click here for more]
Chaosium  $2.50

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Restless

Restless


In the shadowed alleys of the sprawling city of Pecht, where the stench of decay mingles with the acrid scent of arcane incantations, a group of grim-faced witch hunters stalked the cobblestone streets. The Empire, once proud and unyielding, now quivered under the insidious grip of an malevolence that slithered through its heart like a venomous serpent.   Two gruesome murders...   [click here for more]
PE30  $4.90

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The Horror of Morinrood

The Horror of Morinrood


In The Horror of Morinrood the investigators are sent to a remote island in the Irish Sea to investigate a murder at a small research facility. But they are not alone: corporate agents, environmental protestors, and even the mi-go have taken an interest in the island. Trapped by a violent storm, the investigators must unravel the mysterious happenings on Morinrood while also staying...   [click here for more]
Chaosium  $9.99

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The Weekly Rambler vol. 1: Regency Hooks and Seeds

The Weekly Rambler vol. 1: Regency Hooks and Seeds


Presenting The Weekly Rambler: volume 1, a collection of scenario hooks and seeds for your Regency-era game, laid out in the style of a period newspaper. Whether you're looking for a starting point for an evening of improvised horror, or a diversion for investigators during your ongoing campaign, you will find it in this publication. Either choose an entry that sounds appealing,...   [click here for more]
Chaosium  $0.75

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The Domestic - Rivers of London RPG Solo

The Domestic - Rivers of London RPG Solo


RIVERS OF LONDON: THE ROLEPLAYING GAME 2023 ENNIE Awards WINNER – BEST RULES (Silver) NOMINEE – PRODUCT OF THE YEAR Magic has returned to our world “I think becoming a wizard is about discovering what's real and what isn't.” —Ben Aaronovitch, Rivers of London The Domestic: An Introductory Solo Adventure...   [click here for more]
Chaosium   FREE 

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Octopus Tag

Octopus Tag


They're children's games! And they can be deadly, or drive you mad, or both! Inspired by Squid Game, this scenario places the players on an island with mysterious games that eerily remind them of games they played as children. Why are the players on the island? How did they end up there? What are the games for?  Octopus Tag is designed for use with the Call of Cthulhu roleplaying...   [click here for more]
Chaosium  $5.49

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