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
Seven Kingdoms: Ancient Adversaries
0 A.D. is a free, open-source, cross-platform real-time strategy game.
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
Open source clone of the Age of Empires II engine
Remake of the classic Caesar III game
Classic Dune. Modern Controls.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Widelands is a free, open source real-time strategy game
Command and Conquer: Red Alert original source code
Cross-platform, GPL reimplementation of the classic : Syndicate
Repairs unviewable 'Warcraft 3 Replays'
Modification for Age of Empires III
Europa Universalis 4 save game editor
Open source revival of the game Transarctica / Arctic Baron