Multiplayer GitHub Repositories (2026) · Open Source Tools

Co-op multiplayer mod for SPORE (GOG/Steam): play every stage together — one shared world, your own creatures, co-op mechanics in Cell, Creature, Tribe, Civilization and Space

🖥️ Second Life's official client

XMage - Magic Another Game Engine

The Turn Based Strategy Game/eSport. Master your beasts! 🐺

An example implementation binding the Microsoft GDK, XBOX Services, PlayFab and GameInput to Godot 4. Provides GDExtension and Game references for shipping on XBOX on PC.

PokerTH is a poker game written in C++/Qt.

Zetrith's Multiplayer mod for RimWorld

A durable, multiplayer, mobile-first web app for Pi agents, built on Pi Durable

Unofficial open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri ( + Alien Crossfire )

Open Multiplayer, a multiplayer mod fully backwards compatible with SA-MP

Easy to use high performance Network library for Unity 3d

Online Multiplayer Co-op mod for game "Casualties: Unknown"

Easiest way to use Epic Online Services in Godot 4.2+ (EOSG) (includes demo project)

Odamex - Online Multiplayer Doom port with a strong focus on the original gameplay while providing a breadth of enhancements.

A modern terminal with a built-in multiplexer: close it and your sessions keep running. Run shells and tons of AI agents across your machines, then pick them up from desktop, browser, TUI and more. Written in Rust with no UI framework: interface drawn straight on the GPU. No Electron, GPUI or webview.

Share coding agents with your team on phone and desktop

.NET client for Nakama server written in C#.

A simple Pokedex app written in SwiftUI that implements the PokeAPI, using Swift Concurrency, MVVM architecture and pagination

Play Mario Kart: Double Dash!! online on Windows. Project Tandem is a native PC recompilation with 2-8 player solo/shared-kart multiplayer, widescreen, and mouse/keyboard controls. Requires your own compatible USA disc image.

Multiplayer / co-op mod for Dead Cells using DCCM. Play Dead Cells together via local or virtual network with host-client multiplayer. Also join us discord server