Everything a game needs. One browser tab.

Gessa generates the models, the textures, and the audio, builds the world around them, runs the multiplayer, and ships it on a link. No install, no export, no pipeline between the parts.

Start makingOpen the engine

Try an example prompt
Marketing First PersonCliffgarden
Invite
Publish
Cliff Arch0.0, 3.0, -3.8

Drag to orbit · right-drag to pan · click to select · Q/W/E/R tools

Cliffgarden
Environment
Dawn Sky
Cloud Layer
Warm Sun
Azure Water
Cliffgarden Mesa
Upper Meadow
Spring Lagoon
East Waterfall
Cliff Arch
Pine Grove
North Pine
Ridge Pine
Water Pine
Gameplay
Player Spawn
Vista Camera
Assets
Auto Door
Emissive
First-Person Controls
Glass Transmissive
Interactive Crate
Jump Pad
Masked Cutout
Matte Diffuse
Polished Metal
Rough Metal
Sheen Fabric
Starter World
Spawn
Auto Door Sensor
14 items
Cliff Arch
Transformv2
Position
X
Y
Z
Rotation
X
Y
Z
Scale
X
Y
Z
Renderablev2
Visible
Render space
Shape
Model asset
Material
Material Overridev2
Base color tint
Opacity
Emissive
Categories
Featured
a green stamina orb in a small metal cradle with leaf accents
a short split rail fence segment with posts, rope, and grass tufts
a cute crystal snail with faceted shell and translucent blue accents
a bent sapling with chunky leaves
a stack of two weathered dock barrels with rope bands
a tiny clockwork rover with four wheels and brass chassis

Gessa in plain language

What Gessa does, and who it is for

Gessa is an AI-native, browser-based game engine. Describe a model, level, character, rule, game, or simulation in natural language and Gessa composes it on one editable world graph. The same runtime supplies rendering, physics, state, server-authoritative multiplayer, live collaboration, and observable outcomes—without an editor install.

From prompt to running world

Generate game-ready 3D models, textures, images, and audio, then build the world, behavior, AI players, and multiplayer around them in the same engine. Gessa is a complete creation runtime, not an asset generator that stops at export.

For creators, teams, and agents

Gessa is for first-time creators, independent developers, studios, classrooms, simulation and robotics teams, researchers evaluating agents, and software agents using scoped, spend-capped generation tools. Visual edits, code, and AI instructions share one underlying representation.

Available now, with honest limits

Gessa is free to start and in early access. Creation and play work in the browser today; anonymous public share links and native store targets are still rolling out. Paid plans for higher generation volume are being finalized, with current commercial terms available through contact.

Generate

The parts of a game, from a sentence.

Most engines make you bring assets from somewhere else. Gessa generates them in place, described in plain language, dropped into the world you're already building.

Models

Describe a prop, a character, or a whole set piece and get a game-ready mesh, UV-unwrapped, textured, rigged, already placed in your world.

GLBRiggedUV-mappedBrowse the library

Textures

“Mossy stones for a garden path” returns a seamless, tiling material for the world you're in. Images ride the same generation pipeline.

SeamlessIn-engine

Audio

Sound effects, ambient beds, and music, generated from a description on the same pipeline as everything else. Give a character a voice in a line.

SFXMusicVoice

Made in Gessa. Spin any of them.

Open the library
Toon Power MushroomToon Power MushroomSci-Fi Door PanelSci-Fi Door PanelIron CauldronIron CauldronShadow NinjaShadow NinjaStylized Potion BottleStylized Potion Bottle+432 more
Models published
437
Renderer
WebGPU
Installs required
0
Download format
GLB

Flagship world

Bistro.

A world made start to finish in Gessa — every model, texture, and sound in it generated in the engine that runs it, shipping at its own link for anyone to open.

What you just scrolled past, assembled into a game.

Get notified on Discord

The engine

Build it any way you want.

Ask AI for a mechanic. Open the blueprint. Rewrite the code. Pull in a teammate. Hit Play together. Nothing gets exported, flattened, or thrown away.

  1. AskAI builds in the engine
  2. Open itInspect every node
  3. Rewrite itOwn every system
  4. Play togetherMultiplayer is on
  5. Send the linkIt’s already live

Prompt the first pass. Own the implementation.

Ask for a boss fight, inventory, physics puzzle, or weather system. Gessa builds it into the world graph. Then take over every node, component, asset, and line of code.

  • Prompt real mechanics, not mockups
  • Visual blueprints and real code
  • WebGPU renderer and asset pipeline

Real-time collaboration, built into the editor.

Your team opens the same project in the browser. Build, tune, and play at the same time. No project files, editor installs, or questions about who has the latest build.

  • Live multi-user editor
  • Edit and play together
  • One world, always current

Multiplayer is already on.

Player sessions, authoritative state, and persistence are part of the engine. Press Publish and the running world gets a URL. Send it. Keep building. The link stays.

  • Multiplayer from the first playtest
  • Publish in one click
  • Update without re-exporting

The whole loop

The loop other tools can't close.

Asset generators stop at generation. Desktop engines start after it, and leave export, packaging, and hosting to you. Gessa runs the whole loop in one tab.

  1. Stage 01Generate

    Models, textures, and audio, from a sentence.

  2. Stage 02Author

    World graph, blueprints, real code. Edit any of it.

  3. Stage 03Run

    WebGPU renderer, server-authoritative multiplayer.

  4. Stage 04Ship

    A link that's already live. Built to ship native to iOS and Steam.

Asset generators end here

Desktop engines start here, with export, packaging, and hosting still yours to solve

Gessa: one tab, one project, no handoff between stages