Now in Private Beta

KLEENE

The AI Game Engine That Understands Everything You Type

No more rigid command parsers. No more guessing the right verb. Just type what you want to do — and watch the world respond intelligently, without derailing the narrative.

Solo and Multiplayer Worlds Agentic and Human Players Web + CLI + API Collaborative Play
kleene-engine — zork1-mini
You are standing in an open field west of a white house, with a boarded front door.
A rubber mat saying 'Welcome to Zork!' lies by the door. There is a small mailbox here.
> check out the mailbox and read the leaflet
→ Opening the small mailbox reveals a leaflet.
"WELCOME TO ZORK! ZORK is a game of adventure, danger, and low cunning. In it you will explore some of the most amazing territory ever seen by mortals. No computer should be without one!"
>  

Your Imagination Is Just The Beginning

🎭

Solo Play

Explore handcrafted scenarios or generate infinite worlds from a single theme. Save progress, rewind to any moment, and export your journey as a complete narrative with AI-generated insights.

🌐

Multiplayer MUD

Shared persistent worlds where players act simultaneously. Experience collective decision-making and dynamic narratives that shape — but never derail — the unfolding story together.

📝

Collaborative Play

Pair up with an AI Agent you define as your buddy or sidekick, with its own bounded free-will. Meet other players and form a team to solve the quest together.

Scenario Authorship

Generate complete scenarios from a single sentence. Full game logic, inventory systems, character traits, relationship dynamics, time pressure, and intelligent NPCs. Publish and share for the community to explore and enjoy.

🎪

True Improvisation

Type any action you can imagine. The AI interprets your intent and maps it to in-game possibilities — or lets you forge entirely new paths. The Temperature dial (0–10) controls how wild the story can get.

🎮

Classics Reimagined

Return to Zork, Colossal Cave, and other legendary text adventures — completely rebuilt with AI that understands natural language instead of rigid two-word parsers.

Every Choice has a Narrative Response

Every moment in Kleene maps to a 3×3 matrix of player intent versus world response. This isn't just RPG mechanics — it's the gateway to controlled AI improvisation, inspired by Stephen Kleene's three-valued logic.

World Permits World Indeterminate World Blocks
Player Chooses Triumph Bold action succeeds spectacularly Commitment Stakes raised, outcome unresolved Rebuff Decisive action is denied
Player Unknown Discovery Hesitation reveals hidden opportunity Limbo Pure improvisation. Anything possible. Constraint Options narrow around you
Player Avoids Escape Retreat succeeds gracefully Deferral Decision postponed, tension builds Fate No escape. Consequences arrive.
The engine doesn't just parse commands — it understands intent, weighs possibility, and crafts responses that feel alive. This is what interactive fiction was always meant to be.

Ready to Rewrite How Stories Are Told?

Be among the first to experience a game engine where the AI is the world. No scripts. No limits. Just infinite possibility.