0 A.D. is a free, open-source, cross-platform real-time strategy game.
Open source FPS/RTS Game
Mech Station Beta - Tower Defense like Game
open source K240 remake
online 4X browser game engine
Science Fiction, heavy assault, disestablishment of power.
Tactical, turn-based game engine, that uses OpenGL and WinAPI
Real time stratety game
This program is a basic way of the "oldschool"-game Tic Tac Toe
The SCND Genesis: Legends