Galactic Civilizations III: Crusade Alternatives

Battlefleet Gothic: Armada is a Real-time Strategy, Sci-Fi, Single and Multiplayer video game developed by Tindalos Interactive and published by Focus Home Interactive.

Homeworld is an Action-Adventure, Science-fiction, Real-time Strategy, Real-time-tactical, Single and Multiplayer Space Simulation created by Relic Entertainment and published by Sierra Entertainment.

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Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.

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

OGame is an addictive, Massively Multiplayer Online, Real-time Strategy, Space-war, and Money Management Browser-based video game develop by Gameforge AG.

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Sins of a Solar Empire is an Adventure, Strategy, Real-time-strategy, Science-fiction, Exploration, Aliens, Single and Multiplayer Space Simulation developed by Ironclad Games and published by Stardock.

STAR WARS: EMPIRE AT WAR is an Adventure, Strategy, Science-fiction, Real-time-strategy, Star Wars, Single and Multiplayer video game created by Petroglyph Games and published by LucasArts.

X3: Terran Conflict is part of the X number of video games.

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

X Rebirth is an Action-Adventure, Sci-fi, Open World, Sandbox, Trading, Strategy, Space and Single player Simulation created and developed by Egosoft.

Elite Dangerous is a 2015 Trading, Action, Sci-fi, Exploration, Open World and Space Simulation by Frontier Developments.

Zoombinis Island Odyssey is an Educational Puzzle video game created by TERC and published by Viva Media.