Guide one of eight civilizations as you strive for galactic domination. Will you control the entire galaxy through subtle trade and diplomacy, explore every corner of the universe to find powerful artifacts and resources, overwhelm other civilizations with your advanced technologies, or destroy your enemies with massive armadas?

You need to be fast as this promotion is available from Thursday, September 12 at 10 a.m. Pacific time to Saturday, September 14 at 10 a.m. Pacific time.

Just head over to Humble Store and click on “get the game”. Note that you must be logged in to do this. After you add it to your library you can get the key from your account page or wait for the mail with it. Make sure to activate your key on Steam soon because they’ll go invalid soon after the promo ends. Once the key is redeemed to your Steam account, it’s yours to keep forever.