Empyrion - Empyrion is a 3D open world, space survival adventure in which you can fly across space and land on...
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
StarMade - StarMade is a Minecraft inspired 3D space shooter.
Roblox - Reimagining the way people come together.
EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.