Star Trek Online - Star Trek Online (STO) is a free to play MMORPG that takes place inside the Star Trek world.
EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.
X3: Terran Conflict - X3: Terran Conflict is part of the X number of video games.
OGame - OGame is an addictive, Massively Multiplayer Online, Real-time Strategy, Space-war, and Money Management Browser-based video game develop by Gameforge AG.
Star Conflict - Star Conflict is a free MMO action game and space simulator that was introduced in 2012.
FTL: Faster Than Light - FTL is a spaceship simulation roguelike-like.