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
The forever free, ad-free and open source chess server
Real Time Strategy game engine supporting early Westwood classics
A simple turn-based artillery game and also a real-time strategy game.
Arianne is an engine to develop multiplayer online games like Stendhal
Seven Kingdoms: Ancient Adversaries
Endless Sky is a sandbox-style space exploration game
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Open source clone of the Age of Empires II engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Remake of the classic Caesar III game
Cross-platform, GPL reimplementation of the classic : Syndicate
Widelands is a free, open source real-time strategy game
Command and Conquer: Red Alert original source code
Classic Dune. Modern Controls.
Repairs unviewable 'Warcraft 3 Replays'
Modification for Age of Empires III
Europa Universalis 4 save game editor