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Development at the speed of light

Complete Open Source and Modular solution for MMO

Open-source Ragnarok Online 3 (RO3) PC server emulator in C# / .NET 10. Client-documented protocol, multiplayer systems, tools and research.

MUnique / OpenMU

This project aims to create an easy to use, extendable and customizable server for a MMORPG called "MU Online".

rathena / rathena

rAthena is an open-source cross-platform MMORPG server.

Kelsidavis / WoWee

World of Warcraft Engine Experiment - a custom opensource client.

Quaint-Studios / Reia

RPG game action-adventure MMO built with Godot and Rust.

ServUO / ServUO

An Ultima Online server emulator written in C# .NET

OpenKore / openkore

A free/open source client and automation tool for Ragnarok Online

TrinityCore / TrinityCore

TrinityCore Open Source MMO Framework (master = 12.1.5.70391, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.2.60895)

MirrorNetworking / Mirror

#1 Open Source Unity Networking Library

m969 / EGamePlay

一个基于Entity-Component模式的灵活、通用、可扩展的轻量战斗（技能）框架，配置可选使用ScriptableObject或是Excel表格. A flexible, generic, easy to extend, lightweight combat (skills) framework based on Entity-Component pattern. Configuration can choose to use ScriptableObject or Excel tables.

otland / forgottenserver

A free and open-source MMORPG server emulator written in C++

RSamaium / RPG-JS

Framework to create an RPG or MMORPG (with the same code) in the browser with Typescript

HerculesWS / Hercules

Hercules is a collaborative software development project revolving around the creation of a robust massively multiplayer online role playing game (MMORPG) server package. Written in C, the program is very versatile and provides NPCs, warps and modifications. The project is jointly managed by a group of volunteers located around the world as well as a tremendous community providing QA and support. Hercules is a continuation of the original Athena project.

Kaetram / Kaetram-Open

Kaetram is an open-source 2D HTML5 MMORPG. It is an extended version of BrowserQuest (BQ).

youngmonkeys / ezyfox-server

A socket server (include SSL) supports realtime application, realtime game, MMORPG, messaging, chat and streaming data with TCP, UDP and Websocket

NexusForever / NexusForever

An emulator for the defunct MMORPG WildStar which supports build 16042 (Final Patch)

opentibiabr / canary

Canary Server 15.25 for OpenTibia community.

EQEmu / EQEmu

A Fan-Driven Server Platform Preserving the Legacy of a Legendary MMORPG for Over Two Decades and Going

clockworklabs / BitCraftPublic

The open source server code for the BitCraft MMORPG

damian-pastorini / reldens

Reldens - You can make it - Open Source MMORPG Platform

MirageNet / Mirage

Easy to use high performance Network library for Unity 3d

Crypto137 / MHServerEmu

Server emulator for Marvel Heroes

etorth / mir2x

open source MMORPG game

Meridian59 / Meridian59

The MMORPG Meridian 59

xunsang2022 / xs-net

XS-NET 是面向长连接、持久化玩家状态与多节点扩展的 Java 游戏服务器框架，适用于 MMORPG/RPG、SLG、卡牌回合制及房间副本类游戏。基于 Pekko Actor 分片管理玩家、场景与战斗实体，支持 TCP、UDP、KCP、WebSocket、Protobuf RPC、多端 SDK，以及 Redis 缓存和 PostgreSQL 异步持久化。

opensro-dev / opensro

🏯 Silkroad Online v1.150 rebuilt end to end: a WebGPU browser client 🎮, a Go game server ⚔️ and the asset pipeline 🧰 that ties them together. Play in your browser.

IBeam1209 / pokeplus-nexus

PokePlus 2026: Smart Auto-Catch & Battle Bot for PokeMMO Adventures

Xinxonphing / pokeplus-hez-decompiled-archive

PokeMMO Bot Automation Guide 2026: Decompiled PokePlus Project Insights

mars-tw / ai-console

A local hub for every AI CLI on your machine, with a pixel office and a single-player MMORPG. 100% local. 繁體中文 / English.

gonglei007 / GameDevMind

最全面的游戏开发技术图谱(Game Development Map)。帮助游戏开发者们在已知问题上节省时间，省出更多的精力投入到更有创造性的工作中去。

LandSandBoat / server

:sailboat: LandSandBoat - a server emulator for Final Fantasy XI