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
Classic America's Army
Odamex is a free, cross-platform, modern client-server Doom engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Ur-Quan Masters High Definition
Cooperative multiplayer graphical RPG and adventure game
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
Air traffic control tower and radar simulator (solo + multi-player)
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
OpenKore is an automation tool for Ragnarok Online
Open source voxel world
Free 3D Roguelike action RPG
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
A fun realistic multiplayer free-and-open-source first-person-shooter!
Super Smash Flash 2 is the most must-play battle game with 28 classic
The All-in-One music game