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