Open Source Real-Time Strategy Projects

Real-time strategy (RTS) games, where players build bases, manage resources, and command units in real time. Includes open source reimaginings of classic RTS franchises and modern indie RTS projects.

0 A.D.

A free, open-source real-time strategy game about ancient civilizations, with single-player, multiplayer, and modding support.

Alternative to:

Age of Empires

Mindustry

Open source automation tower defense RTS — build factories, mine resources, and defend your core against waves of enemies.

Alternative to:

Factorio

OpenRA

Open source game engine that reimplements early Westwood classics including Command & Conquer: Red Alert, Tiberian Dawn, and Dune 2000.

Alternative to:

Command & Conquer

Widelands

A free, open-source real-time strategy game inspired by The Settlers, focused on building economies and thriving settlements.

Alternative to:

The Settlers

openage

A free, open-source engine and community project recreating Age of Empires II with a modern C++ and Python codebase.

Alternative to:

Age of Empires