Old School Ops

Standalone tool · Windows 10 or 11, 64-bit

GoMMO Client v0.2.0

Play from your own game install, with a window or without one.

GoMMO Client is one Windows program for every game in the table below. Put it in a game's install folder, or point it at one, and it plays that game. It reads the game's own files from your install and ships no game art, so you play with the copy you already have. Lua scripts and the Automation API can drive a character, and the Linux build does both on a server with no window at all.

  • One program for every game it plays
  • Plays from the game install you already have
  • Lua scripts, and an Automation API for AI agents and your own programs
  • Free, no installer, updates itself
Download for Windows v0.2.0 · 9 MB · 2026-10-10
SHA-256becd64da78171da869ddb30fc187de2153159416aaf24e6acb095aebdf4ac2dc
Download for Linux Linux x64, headless · v0.2.0 · 8 MB

No window: it runs scripts and the Automation API on a server.

SHA-256, Linux2745c92a9e70da874f60dff85e3b4de3b5fc561479e7b48d967483119722cc0b

Games it plays

GameSupportNeedsSince
Gate to Heavens Alpha the Gate to Heavens client Since 0.1.0
RF Online: Dragonborn Alpha the RF Online 4.55 Taiwan client Since 0.1.1
RF Online: Age of Patron Alpha the RF Online 4.15 "Age of Patron" client Since 0.1.1
RF Online 1.5 Alpha the RF Online V1.5 "Defcon1 - Cocked Pistol" client - the Korean 2011/2012 relaunch Since 0.2.0
RF Online: Golden Age Alpha the RF Online Episode 2.2.3.2 "Golden Age" client Since 0.1.0
World of Kung Fu Alpha the World of Kung Fu client Since 0.2.0

What it does

Plays from your install

Leave it in a game's install folder, or start it from one, and it plays that game. Anywhere else its start window lists the games you pointed it at before, and takes a new game's folder from a folder picker or a drop.

Knows which game it is looking at

It recognises the game from the folder, and for RF Online which version. When it is not sure, it asks you to confirm.

Your game's own art

Everything on screen comes from your own install. GoMMO Client reads the game's files and ships no game art of its own.

Lua scripts

A script drives your character through the same actions you do: walk, fight, pick things up, wear things, cast. Write your own beside the ones it ships with.

An Automation API

Start it with -mcp or -serve and an AI agent or your own program can watch and play a character, over the Model Context Protocol or HTTP.

A Linux build with no window

The Linux download runs scripts and the Automation API on a server. Give it the game, the game folder and the server, and it plays headless.

Keeps itself up to date

It downloads a newer signed version in the background and installs it the next time it starts.

Specifications

Platform
Windows 10 or 11, 64-bit
Also for
Linux x64, headless: scripts and the Automation API
Needs
Your own install of the game it plays
Install size
One program and its scripts folder, no installer
Settings
gommo.ini beside the program
Updates
Signed, downloaded in the background, installed on the next start
Price
Free

What's in the box

  • GoMMO_Client.exe: unzip it anywhere and run it
  • The scripts folder, which stays beside the program
  • README.txt
  • Signed self-updates, so you stay on the current version

Questions

Do I need the original game?

Yes. GoMMO Client reads the game's own files from your install and ships no game art, so it needs the client the table above names for that game.

How does it know which game to play?

If it sits in a supported game's install folder, or you start it from one, it plays that game. Otherwise its start window asks: it lists the games you pointed it at before, and for a new one you add the game's install folder. -game picks one outright.

Which server does it connect to?

The one gommo.ini names for that game. -host and -port pick another.

Can it run on a server with no screen?

Yes. The Linux build has no window: it runs scripts and the Automation API. Give it -game, the game folder, and -host and -port.

Where do I report a problem?

On the bug form, under GoMMO Client. Say which game you were playing; the form asks for it.

Get GoMMO Client

Free. Unzip it anywhere, point it at your game, and it keeps itself up to date.

Found a problem? Reports for GoMMO Client get their own numbers and go straight to the people who work on it. Report a bug

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