Open source clone of the Age of Empires II engine
Widelands is a free, open source real-time strategy game
RTS game with the theme of Strategy by Design
Seven Kingdoms: Ancient Adversaries
Cross-platform, GPL reimplementation of the classic : Syndicate
0 A.D. is a free, open-source, cross-platform real-time strategy game.
An enhanced version of 7K:AA (Seven Kingdoms: Ancient Adversaries).
Open source FPS/RTS Game
RTSish Game Engine
Cross-platform real-time strategy game (3D)
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Open RealStrategyGameLibrary (Engine)
WeComeInPeace is a simple RTS game that aims towards multiplayer
God game: wage war from the stone age to the future
RTS game for learning Algorithm Design
Remake of the classic Caesar III game
An online multiplayer tactical warfare game for fast action combat!
starcraft clone game
Map render tool for 2d RTS games
Open-source 3D RTS game inspired by the Dungeon Keeper series