Free (as in freedom) open source clone of the Age of Empires II engine 🚀

An open source re-implementation of RollerCoaster Tycoon 2 🎢

A simple Minecraft clone written in C using modern OpenGL (shaders).

TrinityCore Open Source MMO Framework (master = 8.3.7.35284, 3.3.5 = 3.3.5a.12340)

Distributed server for social and realtime games and apps.

Dedicated Game Server Hosting and Scaling for Multiplayer Games on Kubernetes

⚔ Multiplayer Game Server for Node.js

A Curated List of Game Network Programming Resources

Flexible, extensible, and scalable video game matchmaking.

Third-person Survival Game for Unreal Engine 4 (Sample Project)

A retro multiplayer shooter

Warzone 2100 - a free and open source real time strategy game.

Python MUD/MUX/MUSH/MU* development system

In short, Forge Networking is a free and open source multiplayer game (multi-user) networking system that has a very good integration with the Unity game engine. You wanna make a multiplayer game or real time multi-user application? This is the library for you.

Multiplayer game server based on Node.JS

Turn Based Strategy Game. Master your beasts! 🐺

🚀 Making multi-player gamedev simpler since 2017

Compatible client of Ace of Spades 0.75

Multi Theft Auto is a game engine that incorporates an extendable network play element into a proprietary commercial single-player game.

Open "Minecraft-like" game with multiplayer support and Lua scripting support for the both client and server

[Mirror] An open world, open source voxel RPG inspired by Dwarf Fortress and Cube World

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。

Launch your LASERCRAB at walls, ceilings, and enemy heads in this indie multiplayer shooter where "move" and "attack" are synonymous.

Multiplayer game engine/framework built using SocketCluster and Phaser

Multiplayer for OpenMW, a reimplementation of The Elder Scrolls 3: Morrowind's engine.

Source code repository of the FreeOrion project.

An Age of Empires II multiplayer engine

Soldat is a unique 2D (side-view) multiplayer action game

Source code for the Cities: Skylines Multiplayer mod (CSM)

eureca.io : a nodejs bidirectional RPC that can use WebSocket, WebRTC or XHR fallback as transport layers