Stars and Planets Simulator vs Groundbound

Shape the cosmos in Stars and Planets Simulator, a next-generation space simulator sandbox where creation meets exploration. Forge your own star systems from scratch: design radiant stars, swirling magnetars, enigmatic pulsars, and colossal black holes. Craft both terrestrial worlds and massive gas giants, sculpting their atmospheres, terrains, liquid oceans, or molten cores. Seamlessly switch from creator to explorer by piloting your fully customizable spaceship across the universe you designed. Land on your planets, step out with your personalized character, and walk the surfaces you imagined — from rocky wastelands to lush alien landscapes. Gas giants aren’t just clouds; dive deep into their immense atmospheres, maneuvering through stormy skies and dense, liquid metallic oceans, until you reach the solid heart hidden beneath. Every planet, every star, every swirling cosmic phenomenon you encounter is born from your imagination — and ready for you to experience firsthand. The universe is yours to build, shape, and discover.

You've crash-landed on a deserted planet. Your rocket broke apart on impact, scattering its parts across hills, chasms and deep underground. The only way home is to find every last one and rebuild the rocket. BUILD YOUR OWN MACHINE Snap wheels, frames, motors, springs, suction cups, propellers and cargo boxes together on a grid to build a vehicle that's entirely your own. Shape and setup decide everything: whether it climbs the hill, clears the chasm or flips over on the first bend. The physics are real, so you can try out every idea on the spot. EXPLORE THE PLANET The world is one big, seamless place. You decide where to go: across the surface, up into the sky or down into cramped caves that call for a completely different machine. Along the way you'll discover abandoned bases and push on from there. HAUL YOUR CARGO HOME Every part you find exists only once, and nothing makes its own way back. Whatever you find, you have to load up and bring home. Hauling the big rocket parts is a fresh puzzle every time. UNCOVER WHAT HAPPENED Ship's logs lie next to the parts. Bit by bit, they reveal what went wrong on the flight and who built the abandoned bases on the planet. • 2D physics building and driving • open world with caves and hidden places • a story told through ship's logs • achievements and a progress tree • battles with old guard robots • landscape play with touch or keyboard • fully playable in English