Browse free open source Multiplayer games and projects below. Use the toggles on the left to filter open source Multiplayer games by OS, license, language, programming language, and project status.
Open source voxel world
A collection of all maps and games made for the TripleA game engine
Odamex is a free, cross-platform, modern client-server Doom engine
Classic America's Army
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
Ur-Quan Masters High Definition
OpenKore is an automation tool for Ragnarok Online
A 2D Real Time Strategy space combat game.
The All-in-One music game
A fun realistic multiplayer free-and-open-source first-person-shooter!
Cooperative multiplayer graphical RPG and adventure game
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
Free 3D Roguelike action RPG
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
An open source reimplementation of the Among Us Server
A League of Legends model converter