EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.
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.
Gratuitous Space Battles - Gratuitous Space Battles is an Adventure-based, Real-time Strategy and Single-player video game developed by Positech Games.
Star Conflict - Star Conflict is a free MMO action game and space simulator that was introduced in 2012.
Pioneer - Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century.
Kerbal Space Program - Build spacecraft, fly them, and try to help the Kerbals to fulfill their ultimate mission of conquering space.