Free and open source real-time strategy game
A certain block game
Build multiplayer web games played by millions
s&box is a modern game engine, built on Valve's Source 2
Multiplayer Framework for Node.js
Painless peer-to-peer WebRTC networking for rust wasm
OpenSoldat is a unique 2D (side-view) multiplayer action game
Open-source Android/Desktop remake of Civ V
Gradient Bang is an online multiplayer universe
Multiplayer at the speed of light
V1, Mirror Classic. V2, Mirror Engine: Join Discord for access
Dedicated Game Server Hosting and Scaling for Multiplayer Games
A lightweight, modular and versatile mod loader for Minecraft Bedrock
Multiplayer FPS game - Counter-Strike: Football
An open-source sandbox tower defense game
An open source reimplementation of the Among Us Server
Flycast is a multiplatform Sega Dreamcast, Naomi, Naomi 2
Xash3D FWGS engine
Real Time Strategy game engine supporting early Westwood classics
Minecraft map editor and mod
Classic overhead run-and-gun game
You can make it - Open Source MMORPG Platform
Source code repository of the FreeOrion project
Empowering everyone to host fast and efficient Minecraft servers
Fully async, multithreaded, predictive, open source, 3.01 reach