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
This is a program inspired by the classical japanese video game
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
open source K240 remake
online 4X browser game engine
Battlefleet - Naval warfare at the turn of the century: 1895 - 1905
Science Fiction, heavy assault, disestablishment of power.
Your death sentence awaits...
Tactical, turn-based game engine, that uses OpenGL and WinAPI
Real time stratety game
A game developed by Reddit community
A 3D shooting game.