Limit theory!

StarMade is a Minecraft inspired 3D space shooter.

Empyrion features space & planetary exploration, building & construction, mining & resource gathering, survival, crafting, as well as space & land combats. Using the Unity 3D engine, Empyrion uniquely combines elements from space simulations, construction games, survival games and ego-shooters. The game is currently under development by Eleon Game Studios.

Shores of Hazeron is an ambitious and revolutionary game set in a science fiction universe.

Blockade Runner is the beginning of a Multiplayer First Person Adventure Space Sim that will feature fully destructible, operational, crewable 'living' starships in a procedurally generated galaxy.

RODINA is a First Person Space Exploration RPG for Windows PC

Avorion is a procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.

ScrumbleShip is the most accurate space combat simulation devised to date. Gather resources, construct a capital ship out of individual blocks, then pilot it with AI or real-human help against other players.

In Evochron, you are free to seek your fortune as an independent mercenary in an adventure directed by your choices, abilities, and accomplishments. Each player can bring their unique skills and interests to the game, forming clans for cooperative goals or remaining solo to complete objectives on their own in true freeform space-sim gameplay.