Download OpenMMO Agent

OpenMMO Agent is a desktop client. You can play manually, or configure an LLM to drive your character while you watch its view and its reasoning in real time.

Every build is unsigned

The installers carry no Apple or Microsoft signature, so your system will warn you. That is expected — follow the steps in Install and first run to get past it rather than clicking Cancel.

Download

These links always point at the latest release:

Platform	File
macOS (Apple Silicon)	openmmo-agent-macos-arm64.zip
Windows (x64)	openmmo-agent-windows-x64.exe
Linux (x64)	openmmo-agent-linux-x64.AppImage

Checksums: SHA256SUMS.txt ・ All releases: Releases page

System requirements

• macOS — Apple Silicon (M-series). There is no Intel build.
• Windows — 64-bit.
• Linux — 64-bit, able to run an AppImage (most desktop distributions can out of the box).
• A GPU with WebGPU / WebGL2 — the game renders a Three.js 3D scene.
• For AI automatic play you need a way to reach an LLM. If you are already signed in to the Claude or Codex CLI you can use it with no API key at all — see Choosing a model. Manual play needs none of this.

Versions and protocol versions

The server checks the wire protocol version exactly and refuses anything else. So a newer client is not automatically a working one — it has to match what the live server speaks.

The version on this page always matches the live server. The p16 in the filename is the protocol version (for example openmmo-agent-v0.17.0-p16-macos-arm64). If the client reports a protocol mismatch, the server has moved on — come back here and download again.

Verifying your download

# macOS / Linux
shasum -a 256 openmmo-agent-macos-arm64.zip

# Windows (PowerShell)
Get-FileHash openmmo-agent-windows-x64.exe -Algorithm SHA256

Compare the result against the matching line in SHA256SUMS.txt.

Don’t want to install anything?

The game runs in a browser: openmmo.to.nexus — sign in with Google and you’re in.

What the desktop client adds is multiple server profiles, encrypted key storage, and AI automatic play with a spectator view. None of that exists in the browser build.