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.
OpenKore is an automation tool for Ragnarok Online
A collection of all maps and games made for the TripleA game engine
Classic America's Army
Air traffic control tower and radar simulator (solo + multi-player)
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
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
An open source reimplementation of the Among Us Server
The All-in-One music game
Ur-Quan Masters High Definition
Cooperative multiplayer graphical RPG and adventure game
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Super Smash Flash 2 is the most must-play battle game with 28 classic
A fun realistic multiplayer free-and-open-source first-person-shooter!
TKD Scoring Wi-Fi Server supporting Android and IPhone clients