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.
A collection of all maps and games made for the TripleA game engine
Air traffic control tower and radar simulator (solo + multi-player)
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Odamex is a free, cross-platform, modern client-server Doom engine
Classic America's Army
Ur-Quan Masters High Definition
Cooperative multiplayer graphical RPG and adventure game
OpenKore is an automation tool for Ragnarok Online
An open source reimplementation of the Among Us Server
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
A multiplatform medieval 3D MMORPG
The All-in-One music game
Free 3D Roguelike action RPG
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Show off a few tricks with your car and have fun with friends.