FreeOrion is a free, open source, turn-based space empire and galactic conquest (4X) computer game being designed and built by the FreeOrion project. FreeOrion is inspired by the tradition of the Master of Orion games, but is not a clone or remake of that series or any other game.
Download FreeOrion v0.5 for Windows or macOS 10.12+
Download FreeOrion Test Builds for Windows, or macOS.
Forums – GitHub – Twitter – Reddit
Introduction – Screenshots – Videos – License
Download – Support – System Requirements
Quick Play Guide – Multiplayer
Project Overview and Contributing
How to Help – Compile – Python Development (AI & Content) – Content Scripting Tutorial;
Recent Development Activity – Source Code Repository – Reporting Bugs