Topic: multiplayer

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

An open source re-implementation of RollerCoaster Tycoon 2

Python MUD/MUX/MUSH/MU* development system

A curated list of awesome PICO-8 resources, carts, tools and more

Compatible client of Ace of Spades 0.75

Multi Theft Auto is an open-source game engine that adds full multiplayer network play functionality to Rockstar North's Grand Theft Auto game series, in which this functionality is not originally found.

Source code repository of the FreeOrion project.

Turn Based Strategy Game. Master your beasts!

Multiplayer game server based on Node.JS

The main repository containing Stunt Rally sources and game data. A 3D racing game based on VDrift and OGRE with track editor.

Distributed server for social and realtime games and apps.

Multiplayer game engine/framework built using SocketCluster and Phaser