01 · Browser-native

Runs in your browser, on WebGPU.

Frontier rendering with nothing to install. A world is a URL, open a link and you are standing in it, on any machine.

  • No install, a link is the whole download.
  • WebGPU rendering, native-grade inside the tab.
  • Every world has its own shareable address.
gessa.ai/w/aurora-bay
Live render

A world that pushes back.

Physics · Persistence · Consequence

The world is the constraint that makes the intelligence coherent.

Live render

Gessa is building the playable web, where a sentence becomes somewhere people play together.

Gessa is an AI-native game engine: the prompt is the authoring surface, not an add-on. Worlds, 3D models, logic, and server-backed multiplayer come out of plain language, playable in the browser the moment they exist, and shareable with a link.

Learn more about Gessa

What you make

Four outputs. One engine.

Describe what you want and Gessa makes it: a world, a game, an agent, a living system, out of the same material, in your browser, in minutes.

Worlds

Places to inhabit: floating archipelagos, ruin cities reclaimed by jungle, caves you drift through.

Games

Rules to play: low-gravity parkour, dungeons that reshuffle, heists in a clockwork manor.

Agents

Minds that act: companions that remember every run, rivals that learn your style, guides that narrate.

Simulations

Systems that live: weather rolling over a valley, ant colonies you poke, forests grown over centuries.

From words to worlds

Gessa, the engine, turns plain language into persistent, playable worlds, walk in, edit live, share a link, without leaving the browser.

Describe the game, world, rules, mood, and Gessa builds a running version you can walk into and refine.

3D models from text on the same pipeline, textures, images, and audio rolling out, dropped straight into your scene.

Server-authoritative netcode is built into every project. Share a link and your world is already a place for more than one player.

Projects live in the cloud with presence, teammates (and Gessa) edit the same world at the same time, Figma-style.

One-click publish to a hosted play link today, with in-game items and access built into the engine, and native web, iOS, and Steam as the targets it's built for.

Start creating with Gessa
Live render

A blocky survival world with mining, crafting, and monsters at night

Describe a game.
Play it in minutes.

Free to start, no install, playable and shareable the moment it exists.

Gessa Arcade

Play what prompts become, wander a world that keeps running, and see how we measure the AI, the platform around the engine.

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Play now

The arcade

Games made out of words, open one and it builds in front of you, playable and shareable in minutes.

Explore
Live render
Take a walk

Worlds

A living meadow that runs from day into night while you scroll, the world the engine keeps, whether or not you're watching.

Explore
Live render
Open benchmark

GessaBench

How we measure Gessa's AI, published tasks, scored runs, and a podium we only step onto with receipts.

Explore
Explore the arcade

Frequently asked questions

Gessa is an AI-native, browser-based game engine. You describe a game in plain language and Gessa generates the models, worlds, characters, and logic, playable and shareable in the browser the moment it exists. It renders with WebGPU, supports real-time collaboration, and is built to ship native to web, iOS, and Steam.

Still curious? Email [email protected]

AI

Gessa is the AI

Most engines bolt an AI assistant onto a desktop editor. Gessa is the AI, describe a game and it builds the whole thing, in your browser, on WebGPU.

  • One AI, the whole game

    Gessa turns language into everything a game needs, models, textures, audio, levels, AI-driven characters, logic, and multiplayer. Not a suggestion you assemble by hand; the thing itself, ready to play.

  • Not a mascot, not a bolt-on

    There's no separate assistant persona to talk to. Gessa is the platform and the AI, one and the same, the AI isn't helping you drive the tool; it is the tool.

  • Refine any way you like

    Prompt again, or edit directly, both describe the same underlying representation, so nothing is locked behind a single authoring mode.

  • From words to a shipped game

    What you describe becomes a game you can play and share instantly, built to ship native to web, iOS, and Steam, with a monetization path designed in.

Is Gessa an AI assistant inside an engine?

No. Gessa is the AI and the engine, one and the same. You don't operate a traditional editor with an AI helper; you describe what you want and Gessa builds it directly.

Is there a separate AI mascot or co-creator?

No. The product is Gessa. When you prompt, you're prompting Gessa.

What can the AI actually generate?

The whole stack: 3D models and textures, audio, levels and worlds, AI-driven characters, game logic, and multiplayer, playable and shareable on the web instantly, and built to ship native to iOS and Steam.

Start building, freeHow to make a game with AIWhat is an AI-native game engine?Gessa vs Rosebud

The engine

An AI-native engine, built for the browser

Gessa is a game engine designed around natural-language creation, rendering with WebGPU in your browser, with one IR unifying visual, code, and AI scripting.

  • Prompt-first authoring

    You describe what you want and the engine generates it. That collapses the learning curve, no node graph or asset pipeline to master before you can make something playable.

  • WebGPU in the browser

    Modern GPU rendering quality with nothing to install. Because creation lives on the web, your team works in the same project in real time.

  • One IR for visual, code, and AI scripting

    A prompt, a hand-written script, and a visual edit all describe the same game, so you move fluidly between them without rebuilding your work.

  • From a prompt to a shipped game

    What you build goes live on a shareable play link instantly, and the engine is built to ship native to web, iOS, and Steam from one project, with a monetization path designed in.

What makes Gessa an AI-native engine?

In Gessa the prompt is the primary way you author. You describe an asset, a level, a behavior, or a whole game, and the engine generates it directly, rather than you operating a traditional editor with an AI helper attached.

What is the 'one IR'?

Gessa unifies visual editing, code, and AI scripting through a single intermediate representation. A prompt, a hand-written script, and a visual edit all describe the same underlying game, so you're never locked into one authoring mode.

Does Gessa really run in the browser?

Yes. Gessa renders with WebGPU in the browser, no install, and supports real-time multi-user collaboration in the same project.

Build in the browser, freeWhat is an AI-native game engine?Gessa vs NiloGessa vs Unity

Assets

An asset library that writes itself

Generate game-ready 3D models from text, inside the engine, so everything you make is immediately usable. Textures, images, and audio ride the same pipeline, rolling out.

  • From words to game-ready assets

    Describe what you need, “a brass compass with a glowing blue gem in the dial” or “seamless wet stone tile, PBR, 2K”, and Gessa generates it in seconds. No separate tool, no manual import.

  • 3D models today

    Describe a prop, character, or environment piece and get a game-ready 3D model, directly usable in your project.

  • Textures, images & audio on the same pipeline

    Seamless PBR textures and materials, images, and sound are built on the same generation pipeline and are rolling out.

  • Assets that live in the engine

    Standalone asset generators make you export and re-import into another engine. In Gessa the asset is already in your project, place it, script it, and ship it without leaving the engine.

  • Part of a bigger whole

    Generation is one capability of a full engine. The same project builds worlds, AI characters, logic, and multiplayer, assets are a step toward a finished game, not the end product.

What can Gessa's asset library generate?

Game-ready 3D models from a text description, directly usable in your project. Textures, images, and audio are built on the same generation pipeline and are rolling out.

Do I have to import assets into another tool?

No. Gessa's assets are already in your project. Unlike standalone asset generators, there's no export-and-reimport round trip.

Is the asset library the whole product?

No. Assets are one part of a full engine that also builds worlds, characters, logic, and multiplayer, and ships your game.

Generate your first assetGenerate 3D assets from textGessa vs LudoGessa vs Nilo

Collaboration

Build games together, live

Gessa is browser-based, so creation is collaborative by default. Multiple people work in the same project at the same time, describe, edit, and iterate together.

  • Creation, in the same room

    Installing a heavyweight desktop engine isolates each creator on their own machine. Because Gessa lives in the browser, your team can be in the same project at once, prompting, editing, and reviewing together, in real time.

  • Co-edit, don't hand off

    No exporting files, no “send me the latest build.” Everyone sees the same living project, so a designer, a writer, and a developer work side by side.

  • From a shared project to a shipped game

    What you build together publishes to a live play link in one click, built to ship native to web, iOS, and Steam from one project, with multiplayer built in.

Can my team build a game together at the same time?

Yes. Gessa supports real-time multi-user collaboration, so multiple people can edit the same project live in the browser.

Do collaborators need to install anything?

No. Gessa runs in the browser, so collaborators just open the project, nothing to download or set up.

How is collaboration different from multiplayer?

Collaboration is about building together (co-editing the project); multiplayer is about the game you build supporting many players. Gessa does both.

Start a shared projectMake a multiplayer game with AIGessa vs UnityGessa vs Godot

Multiplayer

Real multiplayer, no netcode

Describe the multiplayer and Gessa builds it, networking handled by the engine, while your team co-edits the same project in real time.

  • Describe the multiplayer, not the netcode

    Networking is one of the hardest parts of game development. Gessa lets you describe the game, “a 4-player co-op dungeon with voice chat”, and handles rooms, sessions, and synchronization on a server-authoritative, load-tested runtime.

  • Build together in real time

    Multiple creators work in the same project simultaneously, the same way players will share the world you're building.

  • Ship it everywhere

    Multiplayer games go live on a shareable web play link in one click, and the engine is built to ship native to web, iOS, and Steam from one project.

Can AI build a multiplayer game for me?

Yes. Gessa generates real multiplayer worlds from a description and handles the networking, so you focus on the game rather than the netcode.

Can my team build together at the same time?

Yes. Gessa supports real-time multi-user collaboration, so multiple people can edit the same project live.

Do I need to write networking code?

No. Gessa runs a server-authoritative runtime that handles rooms, sessions, and state synchronization. You describe the multiplayer and the engine builds it.

Build a multiplayer gameMake a multiplayer game with AIGessa vs Rosebud

Monetization

Monetization, designed into the engine

Own what you build and earn from it. Monetization is designed into Gessa as part of the engine, not a bolt-on you wire up yourself, with creator commerce rolling out alongside the platform.

  • A feature, not a bolt-on

    Many tools leave payments to you, or add a single tip-jar integration. Gessa designs payments and monetization into the engine itself, the same platform that meters generation and hosts your game carries the commerce rails.

  • Own what you make

    Gessa builds standalone games that are your own IP, not assets locked into another platform's economy, so your game and its revenue path stay yours.

  • Rolling out alongside the platform

    Selling items or charging for access is a built-in path, not a separate stack. Creator commerce features are rolling out; current commercial terms are available from support.

Does Gessa let me make money from my game?

That's the design: monetization is part of the engine, so selling items or access in the games you build is a built-in path, not a separate stack. Creator commerce features are rolling out, and final financial terms will be published when they are settled.

Do I need to integrate a separate payments provider?

No, Gessa's platform handles payments infrastructure, so creator monetization rides the engine rather than a payments integration you wire up yourself.

Do I keep ownership of what I make?

Yes. Gessa builds standalone games that are your own IP, playable on the web today and built to ship native to iOS and Steam. Contact support for current commercial terms.

How the revenue path worksShip an AI game to iOS & SteamGessa vs Rosebud

Platforms

Web → iOS → Steam, from one project

Generating a prototype is easy; shipping it somewhere people can actually play is the point. Gessa publishes your game to a live web play link in one click, and is built to ship native to the App Store and Steam from the same project.

  • Shipping is the hard part

    Many browser tools stop at a hosted prototype. Some reach Steam only by manually wrapping the game in Electron, and few claim a native App Store path at all. Gessa treats shipping as the point.

  • Live on the web today

    Every project publishes to a live, shareable web play link, hosting, sessions, and multiplayer handled. Friends join from the browser, no installs.

  • One project, three targets

    Gessa treats web, iOS, and Steam as build targets of a single project, so you never rebuild your game per platform. The iOS and Steam targets ride the same project as they roll out.

  • Keep your IP and your revenue path

    Gessa builds standalone games rather than assets locked into another platform's economy, you own what you ship, with a revenue path designed into the engine from the start.

Can people play my game right now?

Yes. Publishing puts your game on a hosted web play link instantly, share it and friends join from the browser, no installs and no servers to run.

Can I publish a browser-made game to the App Store?

Native iOS shipping from the same browser project is what Gessa is built toward, it's a core design target of the engine, rolling out as store shipping matures. Today the shipped path is instant web publishing.

Do I need Electron to put my game on Steam?

Gessa's design is native Steam shipping from the same project, not manual Electron wrapping. Native store targets are rolling out; web play links are live today.

How native shipping worksGessa vs RosebudGessa vs Unity