A space sandbox built on a voxel simulation with nearly life-sized planets, fully destructible terrain, multiple biomes, realistic gravity and atmosphere, and underground cave systems. An Object Designer lets players create their own building blocks — walls, furniture, and mechanical components — which extends to designing custom vehicles, aircraft, and spacecraft from scratch. Survival and Creative modes are both available. Complex simulation systems run throughout: electricity, logic networks, conveyors, thermodynamics with heat distribution across materials, gas and oxygen management, and automation. Multiplayer is supported.