Onceval
An open storybook under the northern lights: Eilean Dubh rises from its pages, with a lit tower, a pier and Nessie in the loch, while a magician's hand places a tiny tree.
Halloween Special Edition

Dream it.
Play it.

Create little worlds through conversation in ChatGPT or Claude. Step inside their stories.

Start with our Halloween tale: explore a haunted Scottish island, uncover its secrets, and guide its lost souls home before dawn.

Play the Halloween tale Create your own tale

About 14 minutes · free, no account needed · a recent Chrome, Edge or Safari

New: the Halloween packNeep lanterns, ghosts and haunted chapels for your own islands, with creator access
A little further into the night
Eilean DubhA tale of Halloween
A glimpse of Onceval

Watch a little
magic happen.

You describe a place to your assistant. Onceval builds the island, its lights and its lost souls, checks the story plays to its end, and you step inside. A small change becomes a new path.

The island and gameplay are captured in the engine. The chat sequence is illustrated.
One island. One unfinished night.

Someone has kept
a place for you.

A boat slips across the loch. Above the shore, one window in the tower is lit. You play a small light: explore, wake the lanterns, uncover the island’s stories and help its spirits cross before dawn, and discover why the laird’s chair is empty.

A small light approaches the ferryman’s boat and the warm lamps on the island’s pier.
A crossing into the unknownDrift ashore as a little light. The ferryman will wait until dawn.
The tower’s cutaway kitchen, a glowing hearth and a letter waiting to be warmed.
Every light has a storyA cold hearth. A hidden letter. Something waiting to be remembered.
The great hall inside the tower, with the long feast table lit by a fire.
A place at the tableClimb through the tower. The island’s last question is waiting upstairs.

Scenes from the playable Halloween tale. Select a picture to look closer.

Explore at your own pace. Dawn can wait.

Step onto the island
You won’t be quite alone

The lost have
stories, too.

Listen to the people who linger here. A small kindness might be all they need to find their way home.

Mairi’s in-game portrait, a pale spirit in a cook’s white cap

Mairi

The cook

“I let the fire go out. Only the once, the night I died.”
Iain’s in-game portrait, a fisherman wrapped against the cold

Iain

The fisherman

“The laird’s fire on the skerry is out.”
Brother Fionn’s in-game portrait, a hooded monk

Brother Fionn

The monk

“Our bell has not rung since the soldiers came.”
The lost soldier’s in-game portrait

A lost soldier

Far from home

“We came in by this cave in the siege, and I cannot find the way out.”
The ferryman’s hooded portrait
“I push off at six, little light, with whoever is ready to cross.”The ferryman
White Heather, another Onceval tale: Dùn Fhraoich at night, its tall tower, a smithy and a cottage lit, a stone ring on its islet and lanterns on the pier.“A candle kept in a high window…”“A handfasting that never happened…”
And what about your island?

Every little world
begins with once.

Imagine a place and something that happened there. Tell your assistant. Watch an island take shape, step into its tale, and share it with someone who loves a good mystery.

Change your mind? Add a ruined chapel. Move the lighthouse. Give someone a secret.

Dream up your own

Create with ChatGPT or Claude.
Free to start, no invitation needed.

Somewhere, a little world is waiting for you.