Frontier rendering with nothing to install. A world is a URL, open a link and you are standing in it, on any machine.
Browser-native
no install, WebGPU-fast
AI-native
prompt to playable world
Multiplayer
server-authoritative, built in
Ship anywhere
web now, then iOS & Steam
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 GessaWhat you make
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.
Places to inhabit: floating archipelagos, ruin cities reclaimed by jungle, caves you drift through.
Rules to play: low-gravity parkour, dungeons that reshuffle, heists in a clockwork manor.
Minds that act: companions that remember every run, rivals that learn your style, guides that narrate.
Systems that live: weather rolling over a valley, ant colonies you poke, forests grown over centuries.
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.
A blocky survival world with mining, crafting, and monsters at night
Free to start, no install, playable and shareable the moment it exists.
Play what prompts become, wander a world that keeps running, and see how we measure the AI, the platform around the engine.
Games made out of words, open one and it builds in front of you, playable and shareable in minutes.
ExploreA living meadow that runs from day into night while you scroll, the world the engine keeps, whether or not you're watching.
ExploreHow we measure Gessa's AI, published tasks, scored runs, and a podium we only step onto with receipts.
ExploreGessa 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.
Gessa is free to start, build and share a game in the browser at no cost. Paid tiers add commercial use, more generation and capacity, and team features.
Whole games: 3D worlds, characters, game logic, and real multiplayer. You can generate assets from text, script with visual, code, or AI through one IR, and share the finished game on a live play link.
No. Gessa generates 3D models and other assets from text, but that's one feature of a full engine. Gessa takes a prompt all the way to a playable, shareable multiplayer game.
Yes. Gessa renders with WebGPU in the browser, no install, and supports real-time multi-user collaboration.
Gessa is built to ship native to iOS and Steam from the same project you build in the browser, no manual Electron wrapping in the design. Today games publish instantly to the web on shareable play links; native store targets are rolling out.
Yes. Every Gessa game runs on a server-authoritative, load-tested multiplayer runtime, networking is handled by the engine. Gessa also supports real-time collaboration while you build.
You own your IP, and monetization is designed into the engine, selling items or access rides the same platform that hosts your game, with creator commerce rolling out. No separate payments stack to assemble.
No. Gessa is prompt-first, so you can build by describing what you want. Code is available through the same unified IR if you want it.
Both are AI-native, browser engines. Nilo's public product centers on exporting 3D assets to Roblox; Rosebud is built on JavaScript/Three.js (not WebGPU) and reaches Steam via Electron wrapping. Gessa renders with WebGPU, runs every game on a server-authoritative multiplayer runtime, and is built to ship native to iOS and Steam with one unified scripting IR.
Gessa is both the engine and the AI interface of the engine: when you describe a game, you're prompting Gessa directly.
Still curious? Email [email protected]