Widelands is a free, open source real-time strategy game
Open source clone of the Age of Empires II engine
RTS game with the theme of Strategy by Design
Seven Kingdoms: Ancient Adversaries
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Cross-platform, GPL reimplementation of the classic : Syndicate
Command and Conquer: Red Alert original source code
An enhanced version of 7K:AA (Seven Kingdoms: Ancient Adversaries).
Open source FPS/RTS Game
RTSish Game Engine
War of seventh kings
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
open source K240 remake
Fly around an island casting spells, summon monsters, collect mana, a
RTS game for learning Algorithm Design
Fast and robust map analyser for Brood War.