Screen GMThe Bellringer’s Crypt
Anselme, a young apprentice bellringer, went down under the bell tower to find out why the bells are going quiet. He never came back up, and the Bell-Mistress needs help.
Port-Bourdon · levels 1 to 3
World · levels 1 to 4
The Thousand Bells Archipelago
L’Archipel des Mille-Cloches
On every island, a giant bell rings by itself. Two have fallen silent, and the sea is starting to go wild.
Screen GM is free. Invitation-only beta for now.
Version 1.0 · November 10, 2026
French edition: the world is in French for now
The story of the world
What you should know before the first session. No spoilers: the rest is for your table to write.
On every island of the archipelago, a giant bell, cast centuries ago by a vanished people, rings by itself at fixed hours. When it rings, the tides, the winds and even certain doors change.
Lately the bell of La Verte-Écume has fallen silent, then the one on Les Dents-de-Sel. No one knows why, and the sea has gone astray: tides out of step, currents that flip direction.
Your characters land at Port-Bourdon, the great harbor town with its red roofs. Each island has its own map and mood, and the thread of the bells links the places without forcing an order of visit.
The factions
La Guilde des SonneursThe bellringers’ guild, keepers of the bells. They know the schedules and what each ringing changes, and the silence has left them lost.
La Compagnie des CourantsThe most powerful trading company in Port-Bourdon, strangely lucky with the tides of late.
Les Passe-MaréeThe smugglers of Les Dents-de-Sel. They live by the rhythm of the tides and the caves, and their silent bell threatens their trade.
Port-Bourdon
Les Dents-de-Sel
Brasierre
La Verte-Écume
The places
Each place is an illustrated map, with its notes and its links to the other places.
The battle maps
With their grid already set: project them on the table as they are.
Adventure hooks
Enough to start the first session tonight. Your table will write the rest.
The Voice of La Verte-Écume
The bell of La Verte-Écume is cracked. Beneath it, a sanctuary keeps its “voice”. Cross a rough sea and make it ring again: a one-shot of about five hours.
La Verte-Écume · level 4The Too-Heavy Crate
Mabelle Embrun, captain of the Tide-Runners, delivered a crate far too heavy. Since then her caves no longer follow the tide, and she wishes she had looked inside.
Les Dents-de-Sel · Port-BourdonWhat is in the world
Everything can be edited: it is a Screen GM world like the ones you create.
6illustrated places
23battle maps
2dungeons
6NPCs
3adventure hooks
FRlanguage of the world
What you need
Not much: the world installs in one click, inside Screen GM.
- A recent browser, on a computerScreen GM runs in Chrome, Edge or Firefox. Safari is possible, with more limited storage.
- About 150 MB of free spaceFor the installed world, images included.
- Access to Screen GMScreen GM is free. Invitation-only beta for now.
How it works
- 1Open Screen GMOn screengm.app, with your beta access.
- 2Go to the Worlds tabThe catalog is always up to date, nothing to download by hand.
- 3Install the worldOne click on “Install”: it is added to your library, and you can change it however you like.
The Thousand Bells Archipelago
Illustrations generated by AI, touched up and gridded for the table.Illustrations generated by AI.