A multiplatform medieval 3D MMORPG
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
A free 3d game for PC that does not limit the player. Fight,Build,Gain
GameServer is a sophisticated, game server designed for online games
Opensource Created Custom Viewers For Virtual Worlds like SecondLife.
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
A fun realistic multiplayer free-and-open-source first-person-shooter!
Cross-platform real-time strategy game (3D)
Advanced map editor
An unmodified version of the MMORPG Impressive Title by KovuLKD
Lines a game written in Python two players through internet
Crossfire RPG Game Weather Patch -- Now a branch on the official repo!
Free MMORPG
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Multi scripts for CS:GO that do just about everything
Olympia PBEM code
Clone of Urban Assault with new Graphics.