Genex
Desktop app that runs AI agents as a game-dev team
- Best for
- Developers comfortable with coding agents who want a free, local, open-source harness for building games, mainly Three.js browser games
- Makes
- Three.js browser games kept as local project files, plus Unity, Unreal, Godot and Roblox Studio projects through engine plugins
- Made by
- Genex
- Where you use it
- macOS, Windows, Linux
- Engines
- Three.js, Unity, Unreal Engine, Godot, Roblox
- Pricing
- Desktop app free and open source (MIT), using your own Claude or ChatGPT subscription or a local model. Optional asset generation is paid in credits: Genex Pro is $9.99/month with 1,000 credits a month, or credit packs start at $5.50 for 500, as of October 2026
- Free plan
- Yes
- Open source
- Yes (MIT)
- Export
- Browser games stay ordinary files on your computer and export as a static web bundle you can host anywhere, or publish on genex.games, per the Genex site's FAQ
- Status
- Early access
Genex is a free, open-source (MIT) desktop app for making games with AI agents. It isn't a new engine: it wraps coding agents developers already use in tools built for game work. The Genex site says it runs Claude through Claude Code, ChatGPT models through Codex, and local models through Ollama or Bonsai, and lets you give planning, building and reviewing to different models. It signs in with your existing subscription, so no API key is needed.
Downloads on the project's GitHub page cover macOS on Apple Silicon and Linux, plus a Windows preview that isn't code-signed yet; the docs page still says Windows is next. The default target is Three.js browser games, which stay as ordinary files on your computer and export as a static web bundle or publish on genex.games. Engine support depends on the source: the site FAQ and changelog describe building in Unity, Unreal, Godot and Roblox Studio, while the README mentions only Unreal and Godot on a Mac. A Blender plugin handles local 3D work, a tools router reaches Meshy, Tripo and ElevenLabs, and anyone can write plugins.
The site describes an experimental self-improving mode: the harness's prompts, skills and tools sit in a Git repository it can edit, a snapshot is taken before each change, a blind judge compares results, and a version that won't start is rolled back.
It suits developers comfortable with code and agents. Asset generation costs credits: Genex Pro is $9.99 a month with 1,000 credits, or one-time packs start at $5.50. The README calls the project early, with rough edges. AIGamer hasn't tested Genex.
Release history
- October 2, 2026: v0.1.0 published on GitHub (releases)
- October 5, 2026: Genex announced the app on X (post); RuntimeWire covered the launch the same day
- October 21 to 23, 2026: v0.1.14 plays Unity, Godot and Unreal games inside Genex, v0.1.16 adds Roblox Studio, and v0.1.20 brings engine games to Windows (changelog)
- October 28, 2026: v0.1.25 released on GitHub (releases)
Plans and pricing
| Plan | Price | What you get |
|---|---|---|
| Desktop app | Free | MIT license; builds on your Claude Code or ChatGPT/Codex subscription, or a local model |
| Genex Pro | $9.99/month | 1,000 credits plus 500 Nex a month; credits work in the Genex app and your own agent; adds frontier models for building on the genex.games web chat |
| Credit packs | From $5.50 | One-time packs that don't expire: 500 credits $5.50, 1,000 $11.00, 2,500 $27.50, 5,000 $55.00 |
From Genex's own pricing page, checked 29 October 2026. Prices change; check before you buy.
Limitation: Genex says in its README that it is early and to expect rough edges; the Windows build is an unsigned preview, and the docs page still lists Windows as coming next.
FAQ
Is Genex free?
Yes. The desktop app is open source under the MIT license and builds games on your existing Claude or ChatGPT subscription or a local model. Only asset generation costs money: Genex Pro is $9.99 a month, or you can buy credit packs from $5.50, per the Genex plans page.
Does Genex need an API key?
No. The Genex site says Claude Code and Codex sign in with your own subscription, your plan's limits apply, and the app doesn't switch to per-call billing.
Does Genex work on Windows?
There's a Windows (x64) preview. The README says it isn't code-signed yet, so Windows may warn before it runs, and the docs page still lists Windows as coming next. macOS on Apple Silicon and Linux (x64) are the main builds.
Which engines does Genex support?
Three.js browser games are the default. The site FAQ and changelog say Unity, Unreal, Godot and Roblox Studio work through engine plugins; the README mentions only Unreal and Godot on a Mac.
Sources
Compiled by AIGamer from Genex's own pages and the sources below, checked 29 October 2026. We haven't tested Genex hands-on.
- Genex: genex-desktop (GitHub README)
- GitHub: genex-games/genex-desktop repository data
- GitHub: genex-desktop releases
- Genex: Desktop app (homepage and FAQ)
- Genex: What is Genex (docs)
- Genex: Changelog
- Genex: How it works (Genex Tools credits)
- Genex: Plans
- Genex (@genex_games) on X: Introducing Genex
- RuntimeWire: Genex launches an open-source desktop harness for AI game development
- Genex: Studio and learning (product docs on GitHub)
Image: Genex (genex-games/genex-desktop on GitHub)
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