Browse free open source Real Time Strategy games and projects for Windows below. Use the toggles on the left to filter open source Real Time Strategy games by OS, license, language, programming language, and project status.
RTS game with the theme of Strategy by Design
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Real Time Strategy game engine supporting early Westwood classics
Endless Sky is a sandbox-style space exploration game
The forever free, ad-free and open source chess server
Seven Kingdoms: Ancient Adversaries
Arianne is an engine to develop multiplayer online games like Stendhal
Dune II strategy and city building on Arrakis
Widelands is a free, open source real-time strategy game
A simple turn-based artillery game and also a real-time strategy game.
Remake of the classic Caesar III game
Cross-platform, GPL reimplementation of the classic : Syndicate
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Open source clone of the Age of Empires II engine
Command and Conquer: Red Alert original source code
Classic Dune. Modern Controls.
God game: wage war from the stone age to the future