What the engine is
A real-time 3D engine with an entity system, materials, shaders, physics and multiplayer. A world is Luau code and data, so everything an agent writes is text you can read, diff and edit yourself.
Zero is an AI game engine built for AI agents
Zero runs 3D worlds in a browser tab and on the desktop. You script it in Luau, and an agent can drive the whole engine over the Model Context Protocol: scenes, entities, materials, shaders and gameplay code.
Build a world in Zero
Creating in your browser is free, and Zero is free to download for Windows, macOS and Linux.
How an agent builds in it
Zero exposes its editing surface over the Model Context Protocol, hosted and in the browser. Point Claude Code, OpenAI Codex, Cursor, Gemini CLI or your own agent at it and the agent works the engine directly.
Where the worlds go
ZeroMind keeps what you publish: commits, branches, tags and packages any other world can install. A published world gets a page and a player anyone can open in a browser.
Worlds running on Zero right now
Each of these is the engine doing its job in a browser tab, with nothing to install. Open one and play it, or fork it and read how it was built.
Grand Theft Auto VI — PS1 Demake
Updated 1mo ago
Vice City, devolved. Lucia and Jason, open-world crime, police chases and a recreated reveal trailer through a PlayStation-era lens.
AFTERCURRENT
Updated 1mo ago
Electric night racing. Drift to charge a shared battery, spend it on boost or focused headlights, and drain your rivals' light across five rain-soaked circuits.
Nürburgring Drive
Updated 4mo ago
Drive the full 20.7 km Nürburgring Nordschleife. Faithful port of esc5221's drive-game: 240 Hz vehicle physics, lap + sector timing, forest-lined guardrailed track, minimap, and a cockpit view with a working rear-view mirror.
Fruit Fly
Updated 1mo ago
A real fly brain, running. All 164,587 neurons of the MaleCNS Drosophila connectome spike on the GPU and drive a fly in an arena you can walk into. Stimulate, silence and ablate any cell type at the lab bench, run five one-press experiments, and watch what the animal does about it.
DOOM.wad
Updated 4mo ago
Multiplayer version of the first chapter in Id softwares game DOOM
SKYWARD: IRON HORIZON
Updated 1mo ago
Launch. Engage. Return. First-person carrier combat with dogfights, fleet defense, and island strike missions.