Odamex is a free, cross-platform, modern client-server Doom engine
Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
Cross-platform real-time strategy game (3D)
0 A.D. is a free, open-source, cross-platform real-time strategy game.
An unmodified version of the MMORPG Impressive Title by KovuLKD
A free 3d game for PC that does not limit the player. Fight,Build,Gain
A fun realistic multiplayer free-and-open-source first-person-shooter!
Free MMORPG
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
3D Space Station Simulator (inspired by SS13)
PvP, MUD RPG.
Your death sentence awaits...
Free 3D Roguelike action RPG
3D FPS Digital Paintball 3 Multiplayer Online Game
Action-packed local multiplayer game
Open Source Virtual World and MMOG Development Platform
Piccoli giochi crescono ^^
A 3D multiplayer RPG based in the world of Khoras.