Source of Mana is a unique 2D MMORPG
An open source reimplementation of the Among Us Server
Open source voxel world
tour based strategic game
A fun realistic multiplayer free-and-open-source first-person-shooter!
Visual Basic 6 2D online adventure game engine
GameServer is a sophisticated, game server designed for online games
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
Air traffic control tower and radar simulator (solo + multi-player)
Cooperative multiplayer graphical RPG and adventure game
Opensource Created Custom Viewers For Virtual Worlds like SecondLife.
A multiplatform medieval 3D MMORPG
Network gamepad/joystick
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Two player Table Tennis video game made usign Python's PyGame library.
Extra image set for Crossfire RPG Game
Cross-platform real-time strategy game (3D)
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers