EVE Online

A Sci-Fi role-playing game featuring turn-based ground combat, space exploration, deep character customization and a massive living universe with over 160,000 star systems. Equip your ships with the best equipment you can find, gather a powerful crew of mercenaries and set out into the void!

A base and fleet building simulator. Then you actually fight in real battle vs bases. Soon to be an elaborate MMO that turns into a universe you can do live role playing with human game masters, changing the face of the universe and its history.

Space MMO exploration, single server universe, mining, construction, research and combat.

Dual Universe is a first-person Sci-Fi MMO built and driven by players, in a single persistent universe. You can build almost anything out of voxels, trade in a free economy, lead industries, travel through space, explore planets, or wage war in a fully editable sandbox universe. Subscription-based.

Outscape is everything you love about traditional strategy games, but places your empire within a vast online galaxy alongside other real players. Outscape rewards skillful long-term strategic gameplay with a brilliantly refreshing new take on the 4X genre.

THE legendary free online multiplayer space shooter! Addictive, fast-paced, easy to learn, and impossible to master.

2155. From the ashes of the devastating Third Great War rose the Commonwealth, an oppressive world government determined to control the entire planet. The few remaining independent factions retaliate the only way they can, with elite teams of special operatives trained in advanced warfare tactics and equipped with high-tech weaponry.

Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!

Anarchy Online – the first ever science fiction MMO – is now on Steam! Compete and cooperate with thousands of player simultaneously on a vast, alien world. Join humanity nearly 30,000 years in the future in a world of perpetual conflict and scientific marvel.

Infinity: Battlescape is a multiplayer space combat sim supporting hundreds of players on a single server. Join one of the corporate factions and fight for domination of a seamless, true-to-scale procedural star system. Participate in massive space and planetary battles involving hundreds of ships.

Shape your citizen, forge your destiny and sculpt your world in this epic voxel sandbox MMO built on endless possibility.

In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.

In the distant future, the X universe faces a period of profound and irrevocable change. While the universe stumbles towards an uncertain future, countless adventures await as new enemies rise in search of power.

The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!

2d space combat like no other. From the perspective of a single crew member, explore the fully destructible interior of any ship in a massive living world. Engage in space combat with no hitpoints where you know your enemy is dead when you see them fall out of their ship into the cold dark of space.

The spiritual successor to Freelancer with a Lovecraftian, sandbox RPG twist. Explore a vast handmade universe with Day 1 mod support and a planned PvP/co-op multiplayer on the Early Access roadmap. You're going to need a bigger ship.

PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.

Create the Starship of your dreams, explore a vast and vivid world and jump into epic space battles. Experience a truly unique and powerful building engine where your imagination is the limit. Welcome to the next evolution in Space Sandbox gaming!

Starbase is a hybrid voxel/vertex-based space MMO with a fully destructible and infinitely expanding universe, with a focus on building and designing spaceships and stations, exploration, resource gathering, crafting, trading, and combat.

Take control of your own starship in a cutthroat galaxy. Elite Dangerous is the definitive massively multiplayer space epic.