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
Seven Kingdoms: Ancient Adversaries
The forever free, ad-free and open source chess server
Real Time Strategy game engine supporting early Westwood classics
0 A.D. is a free, open-source, cross-platform real-time strategy game.
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
Remake of the classic Caesar III game
Classic Dune. Modern Controls.
Cross-platform, GPL reimplementation of the classic : Syndicate
Modification for Age of Empires III
Command and Conquer: Red Alert original source code
Repairs unviewable 'Warcraft 3 Replays'
Europa Universalis 4 save game editor