Browse free open source Multiplayer games and projects for Windows and Linux 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
Ur-Quan Masters High Definition
0 A.D. is a free, open-source, cross-platform real-time strategy game.
The All-in-One music game
OpenKore is an automation tool for Ragnarok Online
Odamex is a free, cross-platform, modern client-server Doom engine
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Air traffic control tower and radar simulator (solo + multi-player)
Free 3D Roguelike action RPG
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
Open source voxel world
Free-to-play multiplayer version of the 8-bit classic M.U.L.E.
Super Smash Flash 2 is the most must-play battle game with 28 classic
Cooperative multiplayer graphical RPG and adventure game
A fun realistic multiplayer free-and-open-source first-person-shooter!
MOVED OUT OF SOURCEFORGE - Server software for Minecraft PE