Call of Cthulhu RPG: Four Ways to Play in Lovecraft's World
If you want to play a Call of Cthulhu RPG, there are four good ways to do it today. You can play Chaosium’s Call of Cthulhu roleplaying game with a group and one person running it. You can play Chaosium’s solo adventures on your own, with a book, dice and a pencil. You can read Lovecraft’s original stories, which are where the whole game came from. Or you can step inside those stories as your own character, with a narrator that has read them and answers whatever you type. Which one fits depends on whether you have a group, an evening alone, or just a strong wish to walk into Arkham and knock on the wrong door.
This guide goes through all four, says who each one is for, and ends with how to try the last one tonight without paying anything.
What people mean by a Call of Cthulhu RPG
The phrase covers two things that share a name. One is a published tabletop game. The other is a short story from 1928 about a cult, a sculpture and a drowned city. Most people searching for it want one of these:
- The tabletop game itself. Dice, character sheets, a Keeper, and friends whose investigators go slowly mad.
- A way to play it alone. No group, no Keeper, still the dread.
- The world of the stories. Innsmouth, Dunwich, Miskatonic University and the things in the dark, as Lovecraft wrote them.
The table shows where each option lands.
The four options side by side
| Chaosium tabletop game | Chaosium solo adventures | The original stories | Play inside the stories | |
|---|---|---|---|---|
| What it is | A roleplaying game run by a Keeper | Numbered-section books you play alone | Lovecraft’s short stories and novellas | Written game in a browser |
| Players | A group plus a Keeper | Just you | Just you | Just you |
| Who you play | An investigator you create | An investigator you create | Nobody, you read | Your own character |
| Story | Published scenario or the Keeper’s own | Fixed branches written by the author | Written by Lovecraft | Grows from your choices, grounded in the book |
| Best for | Groups with a keen Keeper | Solo players who like dice | Readers new to the Mythos | Readers who want the world itself |
The claims about Chaosium’s products below are as of September 2026, read from Chaosium’s own pages.
The Chaosium tabletop game
This is the one most people mean. Chaosium has published Call of Cthulhu for decades, and its getting-started page describes the premise plainly:
“In Call of Cthulhu, you take on the role of everyday people who become investigators of the unknown”
Your investigator is a journalist, a librarian, a taxi driver, a private eye. One player is the Keeper of Arcane Lore, who runs the scenario and plays everyone else in the world. The rest of the group investigates together. The game tracks your Sanity, so every horror you uncover costs you something, and the best sessions end with the group winning the case and losing their minds.
The easiest way in is the Call of Cthulhu Starter Set, listed at $29.99 on Chaosium’s store. Chaosium’s page says the box holds books, dice, premade character sheets, maps and enough content to keep a group busy for several sessions. Its contents include a solo introduction called “Alone Against The Flames”, the starter rules, three starter adventures and five ready-to-play investigators. After that come the Keeper Rulebook and the Investigator Handbook for the full game.
Pick it if you have a regular group and one person who enjoys preparing a mystery and playing every cultist in town. Nothing else on this list gives you the same shared evening.
It is weaker for anyone without that group, and it asks a lot of the Keeper, who reads the scenario ahead, keeps the clues fair and paces the horror.
Chaosium’s solo adventures
Chaosium also publishes adventures for one player. Its solo page puts it simply:
“Away from your gaming group and looking for some fun? Try out our solo Call of Cthulhu adventures!”
These are books of numbered sections. You read one, make a choice or a dice roll, and turn to the section it sends you to. The same page lists Alone Against the Static, Alone Against the Tide, Alone Against the Frost and Alone Against the Dark, and says they need the Quickstart, the Keeper Rulebook or the rules from the Starter Set. The Starter Set’s own opening adventure is a solo one, so it doubles as a way in.
| Solo adventure | Print price | PDF price |
|---|---|---|
| Alone Against the Static | $29.99 (hardcover) | $14.99 |
| Alone Against the Tide | $14.99 | $6.99 |
| Alone Against the Frost | $19.99 | $9.99 |
| Alone Against the Dark | $14.95 | $6.95 |
Pick them if you want the real game’s rules and dice on your own, and you enjoy a tight, authored mystery.
They are weaker for a player who wants to do something the author did not write. Every choice leads to a section someone already wrote, so the story has a fixed set of paths, and once you have found the endings it is spent.
Lovecraft’s original stories
Every Call of Cthulhu game borrows from the same shelf of fiction. “The Call of Cthulhu” itself, “The Shadow over Innsmouth”, “The Dunwich Horror”, “At the Mountains of Madness” and “The Colour out of Space” are where the cults, the towns and the creatures come from.
They are also easy to get. Project Gutenberg, the free library of public domain books, lists all five of those on its page for H. P. Lovecraft, along with many of his other stories, free to read or download.
Pick them if you have never read Lovecraft. Every other option on this list is better once you know what the dread in the books feels like.
They are weaker for anyone who wants to act. The narrator of each story makes his choices, usually the wrong ones, and you watch.
Playing inside the stories as your own character
The fourth way is the newest. You give a narrator a Lovecraft story, and it reads the story before you begin: the towns, the people, how they speak, what they know and what they hide. Then you make your own character and type what you do. There is no list of choices and no section numbers. You can take a room at the Gilman House in Innsmouth, ask the wrong question at the Miskatonic library, or follow the sound under the Dunwich hills, and the narrator keeps the world consistent with what Lovecraft wrote.
This is what LLM RPG does. You upload a book as a .txt or .epub
file, and it builds an atlas of that book’s world (characters, factions,
places, items and events) before your first scene. Lovecraft suits it well,
because the Project Gutenberg editions described above are books you can
upload. Each story becomes its own game. “The Shadow over Innsmouth”, in a
decaying fishing town, plays nothing like the Antarctic expedition of “At the
Mountains of Madness”.
Pick it if what you want is to stay in Lovecraft’s world as yourself, and you would rather type your way into an investigation tonight than learn a rulebook or find a group first.
It is weaker for players who want dice, Sanity rolls and a character sheet. It is a written story, read and typed, and it follows the book rather than Chaosium’s rules. It also plays alone rather than at a table.
For the wider field, see solo role playing games and AI roleplaying. If you like investigations, the Sherlock Holmes game guide covers a gentler kind of mystery, and interactive fiction games covers the tradition of stories you type into.
What it takes to start each one
| Option | How to start | What you need |
|---|---|---|
| Chaosium tabletop game | Buy the Starter Set | A group and a willing Keeper |
| Chaosium solo adventures | Buy a solo book plus a set of rules | Dice, a pencil, an evening |
| The original stories | Download them from Project Gutenberg | Something to read on |
| LLM RPG | Open the site in a browser | Nothing for the first five turns |
With LLM RPG you can play a ready-made world for five turns with no account at all, and signing up adds free credits. The current plans are on the pricing page.
How to start a Call of Cthulhu story tonight
If playing inside the stories sounds like your kind of game, this is the whole path from nothing to your first scene.
- Try it with no account. Open a ready-made world and play five turns. A few minutes tells you whether typing your own actions suits you.
- Sign up with your email if it does. You get a one-time code, no password.
- Download a story. Pick the one you want to live in from Project
Gutenberg, as a
.txtor.epubfile. - Upload the book. The narrator reads it and builds the world before you play, and you are shown what the reading costs before anything is spent.
- Make your character. A graduate student at Miskatonic, a tax assessor passing through Innsmouth, a farmer’s daughter near Dunwich who hears things at night. You are a new person in the story’s world, so you can be anyone.
- Type what you do. “I ask the grocery boy why nobody here looks me in the eye.” “I open the locked trunk in the attic.” The narrator answers in the book’s voice and remembers what you did, including what you should have left alone.
When the tabletop game is the better choice
Be honest about the evening you want. If you have a group and someone willing to be Keeper, Chaosium’s Call of Cthulhu is still the best way to play in this world, and the Starter Set is the easiest way to find out. If you want the real rules alone, the Alone Against books do that well. And if you have never read Lovecraft, start with the stories, because every option here is better once you have.
A written game fits a different moment: you have just finished “The Shadow over Innsmouth”, it is late, and you want to walk those streets yourself as someone of your own. That is the moment it was built for.