FreeOrion – Turn-based Space Empire and Galactic Conquest


FreeOrion, an open-source game inspired by Master of Orion, is a turn-based game of epic space strategy that builds on the classic ‘4X’ model by incorporating the nation-building elements of games such as Europa Universalis 2 and a versatile tactical combat engine.

Players take the helm of a newly-spaceborne Empire to explore and colonize the stars. Sometimes thought of as “Civilization in space,” FreeOrion’s design also provides for a tactical combat engine along the lines of Homeworld and the Total War series.

While its modular, open-source design allows for a significant degree of customization of the game engine and the story elements by the community, the FreeOrion team is dedicated to the construction of a living, breathing universe in a ‘grand campaign’ model.

Features include:

  • Versatile tactical combat engine
  • Novel and complex technology tree
  • Diverse fantastical species
  • Fighters and Carriers
  • Basic form of alliances
  • Design of new ships with a multitude of hulls and ship parts available after research
  • Scripting capabilities
  • Multiplayer gameplay
  • Internationalization support


FreeOrion is inspired by the tradition of the Master of Orion games, but it's not a clone or remake of that series or any other game.

Developer: The FreeOrion Development Team
License: GNU GPL v2 (source code), Creative Commons Attribution-ShareAlike 3.0 Unported licence (artwork, music, and sounds), GNU GPL 2.0 and the Creative Commons Attribution-ShareAlike 3.0 Unported licences (content scripts)
Written in: C++ and Python

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