Open source World Model engine

Create infinite experiences, in minutes.

Your World Model needs an engine.

GENESIS remembers your inventory, characters and locations, applies the rules and connects player actions to generated scenes. It gives your World Model the memory, shared state and playable interface an infinite experience needs.

Watch the demos Build from one prompt

Apache 2.0 licensed. Bring your own models, or connect the Worldstreams API with one server key.

Worldstreams in action

Rick and Morty have their own character controls, and both actions feed the shared experience. Watch the multiplayer Worldstream.

Recorded Worldstreams example. Explore all demos.

Adventure Time · Land of Ooo

A fantasy journey with audience-choice controls around prepared World Model scenes.

Try the preview player

World Model games

Explore playable World Model experiences in this recorded product demo.

Open video

What can you build?

Build worlds people can play, watch, explore, learn from and shape together.

Experience	Imagine your worldstream
Games	Roleplaying adventures, puzzles, quests and battles that remember each choice.
Multiplayer games	Cooperative journeys, competitive arenas and shared worlds with individual player controls.
Infinite TV	Ongoing shows with recurring characters, evolving storylines and audience-directed plots.
Learning experiences	Explore science, practice languages and solve problems inside interactive worlds.
Travel experiences	Wander cities, landmarks and imagined destinations, choosing where to go next.
Interactive history lessons	Step into another era, meet its characters and explore how decisions shape events.
Robotics training simulations	Connect simulation tools to rehearse navigation, object interactions and changing environments.
Therapy and wellbeing	Practitioner-led roleplay, guided reflection and calming environments.
Coaching	Rehearse interviews, leadership and public speaking with scenarios that remember progress.
Training and rehearsal	Practice customer service, workplace scenarios and complex decisions in guided simulations.
Interactive stories	Branching mysteries, character relationships and adventures shaped by the audience.
Social worlds	Shared hangouts, community characters and places that grow with their participants.
Creative sandboxes	Design spaces, invent characters and direct scenes inside a world you can keep changing.
Live events	Audience-led performances, collective challenges and interactive broadcasts.
Virtual showrooms	Explore products, interiors and spaces through guided tours and custom interactions.

These are directions for your next experience. You supply the domain content and rules, then connect the models or specialist tools it needs.

What GENESIS handles

Your controller owns the world's facts. Your LLM and World Model receive the context for what happens next, and every player's interface reflects the accepted result.

World memory

Persist inventory, health, quest flags, locations and character relationships in structured state.

Playable worlds

Build custom interfaces, authoritative turns, player seats and crowd decisions around generated scenes.

Connected generation

Validate LLM replies, track asynchronous jobs and carry real scene checkpoints into the next moment.

Describe any world. Start with one prompt.

The included create-world-stream skill helps a coding agent turn your idea into a working prototype: world settings, a custom interface, controller rules, assets and an exportable bundle.

Use the create-world-stream skill to build Mosslight, a forest
battle worldstream with a cream pixel interface. Let two players
take turns, ask the backend LLM for four moves per encounter,
and remember their inventory, health and progress. Give me a
working local preview and an exportable world.

Start with labeled fixtures for a local prototype. Connect your chosen models and a generation budget for live media. Learn the agent workflow.

Three files. Your whole world.

my-world/
├── genesis.json      World settings, actions, tools and assets
├── interface.html    Your interface and player controls
├── controller.js     World memory, rules and backend requests
└── assets/           Images, audio and video that travel with you

GENESIS coordinates the world; connected providers generate media. Your host supplies identity, storage, credentials and spending policy. Start building.

Choose your connection

Create and publish with Sequencer

Open My Worlds, sign in with your Sequencer account and create a world. Describe your idea to Spark, or import a GENESIS project in the world editor. Preview it, save it and publish it to Worldstreams.

Your existing account, workspace, assets and gems carry through creation and publishing. Exploring these docs and watching the recorded demos is free.

Connect from your own app

Worldstreams API	Your own World Models
One Sequencer server key connects LLM tools, media generation, assets and managed worldstream APIs.	Choose your LLM and World Model, then register their server-side adapters.
Connect Worldstreams	Connect your own providers

The source is Apache 2.0 licensed. Version 0.1 is a source preview, with npm publication and the wider launch being prepared. Browse the repository, read the license, contribute or explore the SDK API.