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
Seven Kingdoms: Ancient Adversaries
Arianne is an engine to develop multiplayer online games like Stendhal
0 A.D. is a free, open-source, cross-platform real-time strategy 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.
Endless Sky is a sandbox-style space exploration game
Widelands is a free, open source real-time strategy game
Remake of the classic Caesar III game
Cross-platform, GPL reimplementation of the classic : Syndicate
Classic Dune. Modern Controls.
Command and Conquer: Red Alert original source code
Europa Universalis 4 save game editor
Open source revival of the game Transarctica / Arctic Baron
Open source FPS/RTS Game