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
Real Time Strategy game engine supporting early Westwood classics
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Seven Kingdoms: Ancient Adversaries
The forever free, ad-free and open source chess server
Endless Sky is a sandbox-style space exploration game
A simple turn-based artillery game and also a real-time strategy game.
Arianne is an engine to develop multiplayer online games like Stendhal
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Open source clone of the Age of Empires II engine
Classic Dune. Modern Controls.
Remake of the classic Caesar III game
Widelands is a free, open source real-time strategy game
Cross-platform, GPL reimplementation of the classic : Syndicate
Repairs unviewable 'Warcraft 3 Replays'
Command and Conquer: Red Alert original source code
Modification for Age of Empires III
Open source revival of the game Transarctica / Arctic Baron