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Old School Ops presents

GoMMO

Framework

The MMORPGs we grew up on, back online. Every server here is written from scratch on one Go framework and speaks the original client byte for byte. Run your own world, mod it with GoMMO Studio, or play on ours once our servers are back up.

Choose your world Run your own server What is GoMMO
Select world11 worlds
Gate to Heavens
Gate to Heavens Modern Alpha v0.3.2 Gate to Heavens Classic Primary v0.3.2
RF Online
RF Online: Dragonborn Primary v0.5.0 RF Online: Age of Patron Maintained v0.2.1 RF Online 1.5 Primary v0.3.2 RF Online: Golden Age Primary v0.8.1 RF Online: Secret of Holystone Maintained v0.1.6 RF Online: Red Army Maintained v0.1.9 RF Online: Giga 4 Part 2 Maintained v0.3.9
World of Kung Fu
World of Kung Fu Alpha v0.2.1
DragonSoul
DragonSoul Alpha v0.1.4
No public servers while we rebuild our hosting. Every world ships as a bundle you can run. Downloads
Now showing Gate to Heavens · Liberty Heaven
[Release]DragonSoul v0.1.4 is out[Fixed]RF15-125 Item Gain Announcements and Kill Count System Not Working, now in a release reported by Dokazin[Idea]New idea IDEA-12: Complete client by 1511747693[Forum]“RF AoP 4.15 - 3rd Party Files for Research” has 4 posts today[Level]BlaBlaName reached level 10[Badge]willymarj earned Shipped[Dev]460 commits to the framework this week[Release]World of Kung Fu v0.2.1 is out[Fixed]RF15-138 1 job lost, now in a release reported by jasmine1006[Forum]New thread: RF AoP 4.15 - 3rd Party Files for Research by Killerwoody[Level]cybercyber reached level 20[Badge]Recks earned Shipped[Dev]Gate to Heavens Classic: 3 commits since v0.3.1[Release]Gate to Heavens Classic v0.3.2 is out[Fixed]RF455-080 ASPD Decreased, now in a release reported by Dave[Forum]New thread: MAU Unit ini by Killerwoody[Badge]BlaBlaName earned In the patch notes[Dev]Gate to Heavens Modern: 1 reported bug fixed in 117 commits since v0.3.1[Release]Gate to Heavens Modern v0.3.2 is out[Fixed]RF455-098 RF 4.55: monster special attacks deal no damage, and specials with a …, now in a release reported by cybercyber[Forum]New thread: Eff Bug by Killerwoody[Badge]1511747693 earned Said something[Dev]RF Online: Dragonborn: 12 reported bugs fixed in 4 commits since v0.2.0[Release]RF Online: Golden Age v0.8.1 is out
The worlds

4 families. One engine room.

Each family is one original game, and each version of it is its own server, because the client changed between them.

Eight kingdoms · 1 version

DragonSoul

A fantasy MMO of eight warring kingdoms, with guilds, mounts, pets and a weekly nation war.

DragonSoul v0.1.4
The framework

What every world is built from

A fix to the core reaches every game, and a game added later starts with all of it in place. Game logic, opcodes and content stay with each game.

Shared Accounts

Core packagepkg/account · pkg/auth
  • One accounts database shared by every game on a server
  • Email login, argon2id password hashing
  • Staff levels granted per game; a ban blocks the account everywhere
  • Gate to Heavens and RF servers can sign players in with their oldschoolops.com account
"Made once. Used in every world."

SQLite and MySQL

Core packagepkg/database
  • SQLite by default, nothing to install
  • MySQL for production
  • One schema; the SQLite form is derived from it at run time
  • A server creates a missing or empty database on first start
"Unzip, run, and the tables are there."

Protocol Layer

Per familygames/*wire
  • Packet framing, ciphers and codecs, one package per game family
  • Opcodes and struct layouts live with each game
  • Every message matches the original client byte for byte
"Never trust a version number."

Build Isolation

Build ruleverify-split
  • Each game binary holds no code from another game
  • One gameserver process per game, serving all its worlds
  • Windows and Linux x64
"What one world breaks stays in that world."

Lua Scripting

Scriptingpkg/script
  • A sandboxed Lua host with instruction and time budgets
  • A verb set per family: RF dungeons, Gate to Heavens NPC conversations
  • Content is .lua files in the server folder, changed without recompiling
"Write a script, not a patch."

Two-Layer Testing

Testingtest · soak
  • Rule tests, each on its own in-memory server
  • A live-world soak under a crowd of bots
  • Both must pass before any release
"Nothing ships that the bots could break."
Activity

What happened in the world

Releases, forum threads and bug reports in one channel, the way a game's chat window shows everything at once.

World chatFull history

[] [Bug] RF455-109 OSO AI replied: Premium Items Are Not Consistently Removed on Logout or Reissued on Login

[] [Bug] RF455-108 OSO AI replied: Incorrect Combination Result Display for Bellato Characters

[] [Bug] RF455-107 OSO AI replied: Ranged MAU Key Becomes Corrupted After Character Relogging

[] [Bug] RF455-106 OSO AI replied: Aggressive Monsters Ignore Vertical Distance When Detecting and Attacking Players

[] [Bug] RF455-112 OSO AI replied: RF 4.55: the chip war timer HUD stays blank: no prep countdown (19/10 never sent) and the phase timer (19/2E) only goes out on a scene change, never at login

[] [Bug] RF455-111 OSO AI replied: Monsters Can Apply Debuffs and Remove Buffs on Players Inside MAUs

[] [Bug] RF455-110 OSO AI replied: Game Client Crashes When Exchanging Race Currency for Items Through NPCs

[] [Bug] RF455-117 OSO AI replied: When a monster kills a player, the death screen names the killer as "<garbage>(Trap)" instead of the monster.

[] [Bug] RF455-115 OSO AI replied: RF 4.55 v0.4.0: Jet Ski Ride Off fails after effect 83 cancellation (03/3F)

[] [Bug] RF455-114 OSO AI replied: Critical Security Vulnerability: Regular Player Accounts Can Execute GM Commands

[] [Bug] RF455-113 OSO AI replied: RF 4.55: the KO window's second revive button (03/47, revive at HQ) is dropped unhandled, and the killer's name is never sent in 03/17

[] [Bug] RF455-121 OSO AI replied: Mounts Not Working Correctly — Character Falls Through Terrain and Cannot Move

[] [Bug] RF455-120 OSO AI replied: MAU PT Stuck at 98/99 After GM Level and Skills Commands

[] [Bug] RF455-119 OSO AI replied: MAU Running Consumes All SP After Approximately 30 Meters

[] [Bug] RF455-118 OSO AI replied: Incorrect SP and FP Calculation at Different Character Levels

[] [Bug] RF455-125 OSO AI replied: List of Bugs from testings using GoMMO Client

[] [Bug] RF455-123 OSO AI replied: HP / FP / SP Capped at 65,535 — Missing Equipment Set Bonuses After Login

[] [Bug] RF455-122 OSO AI replied: Money Limit and Incorrect Currency Display

[] [Thread] Killerwoody replied: RF AoP 4.15 - 3rd Party Files for Research · RF Online

[] [Bug] RF455-124 OSO AI replied: Collection Bonuses Break Combat Balance — Monsters Deal Only 1 Damage

[] [Bug] RF455-116 OSO AI replied: Standard lvl 65 wepon causes force close when equiping

[] [Bug] RF455-098 OSO AI replied: RF 4.55: monster special attacks deal no damage, and specials with a cast condition never fire

[] [Bug] RF455-080 OSO AI replied: ASPD Decreased

[] [Bug] RF15-138 OSO AI replied: 1 job lost

[] [Bug] RF15-125 OSO AI replied: Item Gain Announcements and Kill Count System Not Working

Sign in to post on the forum and report bugs. Forum
Latest dropsChangelog
Game releaseTool releaseRelease candidate
Who is here
Members117
Active this week80
Posts601
Bug reports186
Tools

GoMMO Studio

Open a game client and edit its world. Maps, models, spells and textures for every game on the framework, in one window, with an Install step that writes the client and server files and keeps backups.

  • Map editor with walk grids, spawns, lighting and a problems list
  • Model viewer that dresses characters in real items and plays every animation
  • Texture recolour, packs, and screenshots or turntable GIFs at 1080p
  • Works on Gate to Heavens, RF Online and World of Kung Fu clients
Get GoMMO Studio
GoMMO Studio editing the Bellato map from RF Online: Golden Age
Self-host

Run your own world

A release bundle has the server, its data and a fresh database. Nothing else to install.

  1. Download a release

    Pick a game and a version from Downloads.

  2. Unzip it anywhere

    SQLite is the default, so the databases build themselves on first start. Switch to MySQL when you need it.

  3. Run the server

    One process serves every world for that game. Point the client at it and log in.

DownloadsInstalling guide
gameserver.exeexample start-up
> gameserver.exe
settings.cfg found in .\
database sqlite (default)
gommo_accounts provisioned
game database provisioned
game data loaded
listening on the game port
ready. waiting for players
Press start

One account. Run it, mod it, play it.

Your Old School Ops account covers everything here: the downloads, the docs, the forum and bug reports today, and logging in to our game servers once they are back up.

Operate

Download a server bundle for any game, read the setup docs, and report what breaks so the fix lands for everyone.

Mod

Edit maps, models, spawns and textures in GoMMO Studio, then install the changes into your own client and server.

Play

Log in to our public servers with the same account when they return, and follow every release on the forum until then.

Create an account Get a server bundle

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