In-gen

The future of generative gaming

The next great game could come from anyone.

We're building a future where imagination is the starting point, technology removes the barriers, and anyone can create, share, and succeed in gaming.

In-gen · Public beta · Windows

The game editor you build with AI agents.

Describe what you want. Harmony, In-gen's built-in agent, writes the gameplay, places the scene and plays it back to check its work, and you see every change it makes.

Download In-gen Free

Version 1.0.0-beta.21 · 577 MB · Windows installer

Free. No sign-up, no wait: the installer downloads straight from GitHub.

Explore the Latest Release

Harmony: Your AI Development Partner

Harmony is built into In-gen, not bolted on as a chatbot. Describe what you want to create, and Harmony works directly inside your project, modifying scenes, systems, and data. It tracks changes, breaks complex tasks into manageable steps, and lets you pause or resume development.

Your AI, Your Choice

In-gen doesn't lock you into one AI provider. Connect Claude, ChatGPT, Gemini, or Antigravity, use supported subscriptions or API keys, or control In-gen directly from Claude Code and Codex through MCP. Harmony provides the development environment; you choose the intelligence behind it.

Game Logic Without the Code

Build gameplay through Systems and Sheets instead of burying every rule in scripts. Define mechanics, adjust balancing, and change behaviors through editable data. Once a system exists, you can fine-tune it yourself without another AI request.

Build Once. Publish Anywhere.

Turn your In-gen project into a standalone Windows game or a browser-playable experience. Share it directly with players or publish it to Gen Haven. Your creation doesn't have to stay inside the editor.

Inside In-gen

One editor for the world, the rules, the motion and the sound, with Harmony beside every panel.

In-gen's Terrain panel with Sculpt and Paint brushes, beside a landscape of green hills, a river and a sandy lake shore under a cyan brush ring.
Edit terrain. Sculpt hills, carve rivers and paint grass, sand and water with a brush, or ask Harmony to shape the land for you.
In-gen's Systems tab showing the Shop Income System, marked Implemented, and its Shops sheet of costs, upkeep and income.
Systems. Every rule lives in a System with a plain description and the sheets it reads, so you can tune it yourself.
In-gen's Animations library listing idle, walk, jog, jump, wave and sit clips, with a low-poly adventurer previewing the walk.
Animation. Import FBX or GLB clips or use the ones that ship with In-gen, and preview any clip on your own characters.
In-gen's Audio sound library with waveform previews, what uses each sound, and a Generate sound panel.
Audio browser. Every sound in the project, what uses it, and optional local sound and music generation.

Screens are illustrations of In-gen.

Tech

A real engine underneath, with the editor, the runtime and your game kept in separate layers so a game never leans on editor code.

The engine

  • Four layers: Kernel (rendering, physics, world), Runtime (input, UI, scenes), Authoring (the editor) and Game (your rules).
  • Big worlds: streamed in chunks, with instancing and automatic levels of detail.
  • Nature: sculpted terrain, Gerstner water and ocean, clouds, sun, moon and stars, GPU grass.
  • Physics: rigid bodies, ragdolls, joints and cloth garments.
  • Play: first-person, chase and strategy cameras, gamepad support, navmesh AI and online multiplayer.

Post-processing

  • Bloom and screen-space god rays from the sun or moon.
  • Atmosphere: distance haze, valley mist and sun glow, plus fog.
  • Colour grade: saturation, contrast, warmth and split toning.
  • Looks: a cartoon look with ink outlines and a watercolour look with brush strokes and paper grain.
  • Project effects: write your own GLSL passes, up to 16 per scene, saved with the project.

Hardening

  • Signed updates: every update manifest is signed and every installer is hash-checked before it runs.
  • Clean release builds: editor notes and authoring history are stripped, a validator checks the result, and game data ships in encrypted packs.
  • Locked-down games: a Content Security Policy in every build, and hardened Windows game apps.
  • Agents ask first: outside agents connect over MCP only when you turn it on, and you approve each change.
  • Tested: over 1,000 engine tests, about 1,500 editor checks, and full-app runs before each release.

Tools that come with it

Harmony uses real 3D tools on your machine, set up by In-gen so there is nothing to install by hand.

Blender 4.5

A private, checksum-verified copy that In-gen sets up when you first need it and runs in the background. Harmony uses it to inspect and render meshes, cut booleans, decimate, remesh, unwrap UVs, bake textures and solve rig weights.

blender.org ↗

Kiln

Ships inside In-gen. Harmony writes a small JavaScript program that describes a model, and Kiln builds it into a game-ready GLB with a review image, locally, with no credits spent. Change the program and the model follows.

github.com/instruktlabs/kiln ↗

Also available: Stable Audio 3 for local sound and music generation, and Meshy with your own account for AI-generated models.

Preview

In-gen Publisher Coming soon

From your project to players around the world.

In-gen Publisher will streamline the process of preparing, validating, and publishing games to Gen Haven. Built directly into the engine, it will help creators prepare professional releases without manually managing every technical detail.

  1. Automated Game Validation

    Check exports, dependencies, startup behavior, missing assets, and compatibility.

  2. Screenshot Capture

    Capture gameplay screenshots and generate candidate thumbnails and store-page imagery.

  3. Performance Analysis

    Measure FPS, frame times, memory usage, and rendering requirements.

  4. Content Moderation

    Screen assets and game content for potential violations, with additional review where necessary.

  5. Store Page Generation

    Prepare descriptions, images, version information, controls, and game metadata for creator approval.

  6. Publish to Gen Haven

    Submit approved game builds for hosting, discovery, and eventually monetization.

Not available yet. Publishing to Gen Haven will need a Gen Haven account and publisher verification. Today, In-gen builds Windows and web versions of your game that you can share yourself.