86 Open source projects that are alternatives of or similar to Single Player

A Dark Ages Private Server Project

RuneScape Classic client mod & preservation platform

MMORPG Game Server toolkit written in Elixir

Client for Argentum Online

MMORPG是一个可以用来学习ARPG核心战斗的项目（不再维护）。http://v.youku.com/v_show/id_XOTE5NDg1MTg0.html?firsttime=0

Scalable MMORPG game server based on entity control

Archived, read-only repository. New repository: https://github.com/opentibiabr/otservbr-global

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

Current Source Code for LuminariMUD - A Pathfinder/D20 Multi User Dungeon

MMO made in Unity

💎 A server emulator for Final Fantasy XI.

Asheron's Call server emulator.

A collection of mobile friendly guides to help players navigate group content in Final Fantasy XIV.

Lib9c is a library that contains key implementations of Nine Chronicles, a decentralized RPG developed with Libplanet. Lib9c includes Nine Chronicle's key features like in-game decisions and data models, which can be used to implement game core capabilities.

⚔️ An online JavaScript 2D Medieval RPG.

Most complete and secure free 2D online game creation tool from RPG Maker.

Legacy VB6 open-source ORPG

🎮 runescape classic web client

Create your browser RPG and MMORPG in your browser !

The optional world database for NexusForever.

⛵ LandSandBoat - a server emulator for Final Fantasy XI. Just an X-34 landspeeder out for a drive.

A3 MMORPG emulator written in NodeJS

springboot编写的轻量级高性能mmorpg手游服务端框架，基本功能逐渐完善中。

Stendhal is a fun friendly and free multiplayer online adventure game with an old school feel.

(discontinued) @telemmo_bot 🌐 An idle MMORPG for Telegram

🏞️ Multi-platform Ragnarök Online MMORPG client

Open-Source MMORPG Server Emulator

Perpetuum Standalone Server

An unfinished web-based client written in Javascript for the game Ultima Online

DEPRECATED - FFXI Server Emulator - See Project Topaz

Tataru Helper - application for translation of in-game texts in Japan MMORPG - Final Fantasy XIV. The texts are understood as MSQ, cutscenes, quests, NPC replicas, etc.

Plugin to transform RPG Maker MV to MMORPG Maker MV

KingNetwork is an open source library to facilitate the creation and communication of clients and servers via TCP, UDP, WebSocket and RUDP sockets.

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.

Official repository for the Pirates Online Rewritten source code.

A mobile realtime bullet-hell 8-bit style MMORPG

FOnline: The Life After

An Ultima Online server emulator written in C# .NET

Data for Tera DPS meter

https://trueuo.com

Unity client application for Nine Chronicles, a fully decentralized idle RPG powered by the community.

Ultima Online Shard Emulator w/ Node.js

Moved to https://gitlab.com/nicolaw/trinitycore

C# Packet Sniffer for the Tera

A modern Ultima Online server written in PHP

EQEmu - Open Source EverQuest Server

Everything for the game Rogueworld.

A free and open-source Pokémon MMORPG client written in C++ based on otclient.

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

游戏服务器框架，网络层分别用SocketAPI、Boost Asio、Libuv三种方式实现， 框架内使用共享内存，无锁队列，对象池，内存池来提高服务器性能。还包含一个不断完善的Unity 3D客户端，客户端含大量完整资源，坐骑，宠物，伙伴，装备, 这些均己实现上阵和穿戴, 并可进入副本战斗，多人玩法也己实现, 持续开发中。

#1 Open Source Unity Networking Library

Integrated development environment (IDE), an editor for Smart Scripts (SAI/smart_scripts) for TrinityCore based servers. Featuring a 3D view built with OpenGL and custom ECS framework

OTX Server from:

A fast, scalable, distributed game server engine/framework for C++, include the actor library, network library, can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal.

Finally, an MMORPG that's all about grinding and doing chores.

TrinityCore Open Source MMO Framework (master = 9.1.5.41488, 3.3.5 = 3.3.5a.12340)

A MMOG engine of server.

一个基于Entity-Component模式的灵活、通用的战斗（技能）框架，配置可选使用ScriptableObject或是Excel表格

AresRPG is a Minecraft MMORPG Server