X3: Terran Conflict - X3: Terran Conflict is part of the X number of video games.
EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.
STAR WARS: EMPIRE AT WAR - 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.
Star Citizen - 1, 966, 341. Active citizen. Help us make Star Citizen a reality! Become a backer of the next-generation of Space-man. Reserve your ship.
Kerbal Space Program - Build spacecraft, fly them, and try to help the Kerbals to fulfill their ultimate mission of conquering space.
Elite Dangerous - Elite Dangerous is a 2015 Trading, Action, Sci-fi, Exploration, Open World and Space Simulation by Frontier Developments.