Odamex is a free, cross-platform, modern client-server Doom engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
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!
Cross-platform real-time strategy game (3D)
Free MMORPG
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
starrydb is game server engine
A collection of all maps and games made for the TripleA game engine
Java decentralized cross-platform network multiplayer game engine
Free strategy browsergame engine.
Free 3D Roguelike action RPG
Library for creating turn-based games with simultaneous moves.
Minecraft private Skin Center
A Dungeons & Dragons Miniature Game.
A multiplayer First-Person-Shooter game built in Java 3D
Piccoli giochi crescono ^^