Free Orion Information
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Free Orion - Free turn based galactic conquest game
Company: FreeOrion
Availability: 
Free Orion is a game similar to Masters of Orion which set the benchmark for these types of games.
The general idea of Free Orion is to research technology, create fleets of ships, conquer and colonise other worlds and then eventually the galaxy. But you will have to get past the AI first.