Galactic Civilizations III - Crusade

Galactic Civilizations III: Crusade is a Downloadable Content Pack of the original game of Galactic Civilizations III developed and published by Stardock Entertainment.

14 Alternatives To Galactic Civilizations III - Crusade

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Ace Online

Ace Online is a distinctive 3D MMO that places you in the pilot seat of your personal fighter ship (called a Gear).

DarkOrbit

DarkOrbit provides a space focused MMO that allows players take control over their own spacecraft.
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DarkStar One

DarkStar One is targeted on space trading and combat.

Evochron Mercenary

Official Webpage for Evochron Mercenary, a 3D space combat and trader simulation. Screenshots, free demo, forum, cheats, videos, and more.
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Kerbal Space Program

Build spacecraft, fly them, and try to help the Kerbals to fulfill their ultimate mission of conquering space.
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Star Trek Online

Star Trek Online (STO) is a free to play MMORPG that takes place inside the Star Trek world.