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Unwritten playtest
by Romain Brancherie
Unwritten is an experimental AI-powered narrative game where you can attempt anything. Write your actions freely, explore a world governed by hidden rules, and shape the story through choices the game never asked you to make.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Oct 14, 2026
- Planned release
- Coming soon
- Developer
- Romain Brancherie
- Platforms
- Windows
- Players
- Single-player
- Languages
- English, French
How to join the Unwritten playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the Unwritten playtest signup there. You're in straight away, with nothing to pay.
- The playtest shows up in your Steam library, ready to install and play.
New to playtests? How Steam playtests work
How AI is used
Unwritten uses generative AI as part of its core gameplay. AI systems interpret the player's freely written actions and generate narrative responses within an authored world, story and set of rules. AI inference runs locally on the player's computer.
The developer's own words, from Steam.
About Unwritten
THE EXPERIMENT IS OPEN — JOIN THE PLAYTEST
UNWRITTEN is not released yet, but the experiment has already begun.
An early version of the game is now available through Steam Playtest. Step into the simulation, uncover its hidden rules, and help shape the experience with your feedback.
This is an experimental build. Expect imperfections, unexpected behaviors, and a world that is still evolving.
Request access to the free Playtest above and enter the experiment.
WRITE YOUR ACTIONS
Most games ask you to choose from actions someone has already imagined for you.
Unwritten doesn't.
Write what you want to do. Follow the obvious path, ignore it, question someone, lie, investigate something that looks irrelevant, or attempt something the game never explicitly offered.
The game interprets your intent and the world responds.
YOUR ACTIONS SHAPE THE STORY
Unwritten is not an empty AI sandbox.
There is a world to explore, a story to uncover, events to encounter and rules governing what can — and cannot — happen.
AI allows the game to react to actions that were never individually scripted, while keeping them grounded in that world.
You are not generating the story from nothing.
You are finding your own way through it.
FIGURE OUT HOW THIS WORLD WORKS
You begin knowing very little.
Pay attention. Experiment. Make assumptions. Test them.
Some actions will work exactly as expected. Some won't. Others may reveal something you weren't supposed to notice yet.
Understanding the world — and its boundaries — is part of the experience.
AI-POWERED, LOCALLY
Multiple AI systems work together behind the scenes to understand your actions and determine how the world responds.
AI generation runs directly on your computer, without cloud inference or per-generation costs.
Your machine doesn't just render Unwritten.
It runs part of its world.
A NARRATIVE EXPERIMENT
Unwritten is an experimental indie game built around one question:
What happens when a narrative game has a story to tell, but stops deciding in advance how the player is allowed to interact with it?
From the game's Steam page.
