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
Ur-Quan Masters High Definition
Odamex is a free, cross-platform, modern client-server Doom engine
Classic America's Army
Cooperative multiplayer graphical RPG and adventure game
0 A.D. is a free, open-source, cross-platform real-time strategy game.
A 2D Real Time Strategy space combat 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.
Free 3D Roguelike action RPG
A fun realistic multiplayer free-and-open-source first-person-shooter!
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
The All-in-One music game
FreeCS is a free-software reimplementation of Counter-Strike 1.5.