60+ similar titles based on shared tags and player behavior. Themes include Space, Simulation, Space Sim, Sandbox.
A planet-building sandbox where you create entire worlds from the ground up. Generate unique planets, shape vast landscapes, and use interconnected simulations inspired by real-world processes to bring your fantasy planet to life.
Inspiral: Echoes of Gravity
Start as an asteroid, grow by absorbing other celestial bodies to become a planet, a star, and ultimately a black hole. Experience realistic gravity and orbital physics in an ever-evolving sandbox universe.
Gaia Maker
Gaia Maker is a planet-wide simulation game of terraforming, based on real physics and geology. As the planet's overseer, wield advanced technologies to reshape barren planets into life-filled worlds. Foster animal life, cultivate civilizations, or destroy them. Their fate is in your hands.
Start as an asteroid, grow by absorbing other celestial bodies to become a planet, a star, and ultimately a black hole. Experience realistic gravity and orbital physics in an ever-evolving sandbox universe.
Why similar: Space Sim 21.6%, God Game 20.2% ★, Sandbox 13%, Simulation 10.2%, Procedural Generation 9.8%
Gaia Maker is a planet-wide simulation game of terraforming, based on real physics and geology. As the planet's overseer, wield advanced technologies to reshape barren planets into life-filled worlds. Foster animal life, cultivate civilizations, or destroy them. Their fate is in your hands.
Why similar: God Game 27.3% ★, Sandbox 18.3%, Space Sim 17.8%, Simulation 15%, Space 6.6%
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
Why similar: Space Sim 21.5%, Sandbox 15.1%, Science 14%, God Game 12.9% ★, Simulation 10.3%
Watch empires rise and fall, or intervene with godly powers, in GalactiWar, a space empire simulation sandbox game.
Why similar: God Game 24.4% ★, Sandbox 17.2%, Simulation 14.9%, Space Sim 14%, Science 12.2%
Biosphere Simulator is a planetary god game sandbox where you guide a dead volcanic world through billions of years of evolution. Seed life, shape ecosystems, unleash cataclysms, and watch civilizations rise from primordial microbes to spacefaring societies.
Why similar: God Game 25.2% ★, Science 15.4%, Space Sim 12%, Sandbox 10.2%, Simulation 9.7%
47 million probes were launched into the void. Yours just found something alive. A living universe simulation where evolution never stops — not even when you do.
Why similar: Space Sim 21.2%, Procedural Generation 18.6%, Simulation 18.4%, Sandbox 15.6%, Science 8.4%
Space Travellers is a unique open-world sandbox space simulator set in the year 2343. Travel the galaxy, trade, explore unexplored worlds, fight, build bases and factories, forge alliances and experience new adventures!
Why similar: Space Sim 28.1%, Procedural Generation 15.4%, Sandbox 13.2%, Simulation 10.6%, Space 8.9%
Explore a seed-driven galaxy where every ship, planet, and dungeon is generated at runtime. Dogfight pirate wings, land on 20 kinds of worlds, raid surface sites on foot, and build a fleet from salvaged hulls, solo or in Steam co-op. The same seed rebuilds the same galaxy, every time.
Why similar: Space Sim 34.3%, Simulation 16.2%, Sandbox 15.6%, Science 11.2%, Exploration 7.5%
Become a pioneer of spaceflight. As an engineer in the Soviet Space Program you will be responsible for repairing, fixing and building the iconic spacecraft and rockets from the R-7 family.
Why similar: Space Sim 22.3%, Simulation 18.5%, Science 16.7%, Sandbox 12.9%, Space 8.5%
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
Why similar: Space Sim 30.1%, Sandbox 18.5%, Science 16%, Simulation 10.9%, Space 10.1%
Once Upon The Universe is a god-game that takes you to the VERY beginning of creation. You begin the game just after the big bang, with nothing but an empty space and a lot of super hot hydrogen in the entire universe. Fill the universe with life and watch it thrive - or destory it.
Why similar: God Game 30.3% ★, Space Sim 28.9%, Sandbox 16.2%, Simulation 8.9%, Space 8.8%
A first-person astronomy simulator built on real astronomical data. Set up, align, and operate your telescope as the sky changes with location, date, and time. Use star charts and bright stars to find targets, then observe the Moon, planets, and faint, distant deep-sky objects through the eyepiece.
Why similar: Space Sim 36%, Science 22.1%, Simulation 11.1%, Sandbox 9.6%, Realistic 6.9%
Master the cockpit of highly realistic spacecraft in this Newtonian physics based sim. Take off from surface to space, plot a course between the planets and dock with space stations. Trade commodities or take shipping contracts to buy upgrades and optimize your build - every choice matters.
Why similar: Space Sim 21.6%, Sandbox 17.8%, Simulation 17.5%, Science 11.8%, Space 9.7%
Explore a scientifically accurate Milky Way galaxy and discover distant uncharted worlds, while having unrestricted access to every deck of your Magellan Class deep space exploration vessel. Interact with numerous fully simulated ship systems, or simply relax in the bar and watch the stars drift by.
Why similar: Space Sim 26%, Science 16.7%, Sandbox 11.8%, Procedural Generation 11.3%, Space 8.6%
A physics-based mining sim, set in the thickest debris field in Sol. Every action has a reaction, lasers are invisible without a medium, and your thrust is a potent weapon. Find trade, adapt your equipment to your playstyle, hire a crew to help. Unravel the mysteries of the rings, or just get rich.
Why similar: Space Sim 21.8%, Science 14.9%, Procedural Generation 12%, Space 9.6%, Sandbox 9.4%
Build rockets and fly them around the Solar System in this realistic aerospace sandbox. Attempt landings, build space stations, drive rovers, perform spacewalks, explore alien worlds, and get your crew home safe.
Why similar: Space Sim 29.9%, Sandbox 16%, Science 13.2%, Simulation 12.2%, Space 7.4%
A futuristic sci-fi persistent universe exploration game with one million stars and 18 million planets and moons. Fly your ship to any star and explore its solar system. Claiming stars, planets and moons will make them yours forever - other players will see your discoveries and you will see theirs.
Why similar: Space Sim 38.2%, Simulation 24.1%, Procedural Generation 11.3%, Exploration 8.7%, Space 7%
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
Why similar: Space Sim 23.7%, Science 18.6%, Sandbox 17.6%, Space 13.6%, Simulation 13.2%
Dynamic abstract sandbox universe. Changes and evolves as you do.
Why similar: Sandbox 20%, God Game 16.4% ★, Space 16.2%, Space Sim 15.8%, Simulation 9.6%
Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.
Why similar: Space Sim 22.3%, Science 17.3%, Sandbox 14.4%, Simulation 9.1%, Space 9%
A 2D space trading game with a real economy. NPC ships haul cargo between 78 stations and prices move whether you're there or not. Good routes die as other traders catch on, so you keep hunting new ones. No quest markers, no "best trade" arrows. Just you, a map, and the prices.
Why similar: Space Sim 32%, Simulation 20.4%, Sandbox 19.8%, Exploration 7.3%, Procedural Generation 7%
Drifter is an open-world sandbox space trading game with a procedurally-generated galaxy 100,000 light years across made up of tens of thousands of star systems to explore and features an original soundtrack by composer Danny Baranowsky.
Why similar: Sandbox 20.6%, Space Sim 20.5%, Simulation 16.6%, Space 13.9%, Procedural Generation 11.3%
I am excited to release my first game on Steam! SimpleRockets was released in 2013 for mobile and I've put a ton of work into it to get it ready for PC and Mac. It was inspired by KSP, and it offers a simpler 2D experience for building rockets and exploring space with realistic orbital mechanics.
Why similar: Space Sim 37%, Sandbox 23.5%, Simulation 23.4%, Space 7.7%, Physics 6.6%
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.
Why similar: Space Sim 22.5%, Sandbox 15.8%, Science 15.6%, Procedural Generation 10.2%, Space 9.2%
Explore the Solar System. Mine and drop asteroids. Colonize and terraform. Lead the space race and compete with other corporations on your way to profit. Watch the expansion of human race over the centuries.
Why similar: Space Sim 22.8%, Science 19.6%, Sandbox 15.7%, Simulation 10.9%, Space 10.3%
Lead an expedition into an unexplored solar system. Build rockets, aircraft, and other vehicles, discover new worlds, gather resources, complete missions, unlock technology, and grow a colony of tiny purple Klorps in this spaceflight sandbox.
Why similar: Space Sim 33%, Simulation 22.5%, Sandbox 17.8%, Space 12.3%, Exploration 5.7%
PHYSARUM is a sandbox simulation game. Simulate the real world slime mold Physarum polycephalum by generating millions of living particles. Create and mutate slime species in real time to discover countless mesmerizing and emergent patterns.
Why similar: Science 22.5%, Sandbox 21.7%, God Game 21% ★, Simulation 18.6%, Procedural Generation 15.2%
An artificial life simulation about a robot cultivating ecosystems on the moons of a ruined planet. Grow fantastical plants and animals, facilitate their evolution, and gather resources while discovering the secrets of this strange world.
Why similar: Space Sim 22.1%, God Game 20.6% ★, Sandbox 13.5%, Science 13.3%, Procedural Generation 12.1%
Explore a seamless endless universe with an uncountable number of galaxies, stars, planets, and moons. Make friends or enemies with unique alien civilizations. Research upgrades for your vessel with scientific phenomena and alien tech that you've acquired.
Why similar: Space Sim 32%, Sandbox 17.1%, Procedural Generation 15.6%, Simulation 10.9%, Space 8%
The existence of all mankind is under threat. You are the only hope!
Why similar: Space Sim 29.7%, Science 19.2%, Simulation 17.8%, Space 12.3%, Procedural Generation 9.8%
Galactic Simulator 3 is a space exploration and evolution sim inspired by the Fermi Paradox and Great Filter theory. Scan uncharted star systems, gather resources and samples, establish outposts and stargates, and witness the rise and fall of civilizations across an ever-evolving galaxy.
Why similar: Space Sim 30.9%, Procedural Generation 16.6%, Sandbox 14.5%, Simulation 14.4%, Space 10.3%
Kerbal Space Program 2 is the sequel to the acclaimed space-flight simulation game Kerbal Space Program. Enter the next generation of space adventure with exciting new parts, stunning visuals, fully revamped UI and Map View, and rich new environments to explore.
Why similar: Space Sim 21%, Science 19.6%, Sandbox 15.8%, Space 9.6%, Simulation 8.9%
Deep Claims is a space exploration game where you upgrade your ship and equipment in order to mine increasingly valuable and hazardous asteroids. Can you make it to the core?
Why similar: Space Sim 24.7%, Sandbox 20.1%, Simulation 13.6%, Procedural Generation 12%, Exploration 10.3%
Build rockets and shoot them into space. Once you reach orbit, you are halfway to explore anywhere in the Solar System.
Why similar: Space Sim 35.2%, Simulation 20.4%, Science 16.1%, Space 15.2%, Exploration 9.3%
pan·gaia is a whole-Earth sandbox fresh outta 1999. Sculpt your planet's climate, balance its ecology, design the perfect species for a niche, and maybe, lead them to sapience. Or... hurl meteors at them.
Why similar: Sandbox 27.7%, God Game 25.5% ★, Science 18.1%, Simulation 16.3%, Nature 12.1%
A sci-fi settlement building game with orbital mechanics. Start from a spaceship, scan asteroids, manage fuel, ore, electricity, time, and sanity, while expanding your settlement, exploring an alien solar system, and building stations and spacecraft to support your growing colony.
Why similar: Space Sim 30.8%, Science 15.6%, Simulation 11.4%, Sandbox 11.4%, Space 7%
Elysian Eclipse is a Sandbox Evolution Simulator, letting you evolve from an amoeba into a space traveling sentient being. Create your own creatures, buildings and vehicles to conquer procedural planets. Turn the galaxy into your personal playground!
Why similar: God Game 27.9% ★, Space Sim 21.4%, Sandbox 14.8%, Simulation 9.9%, Space 7.9%
Lead humanity’s final journey beyond Earth. Launch ships, harness gravity slingshots, and explore distant star systems to make humanity multi-planetary.
Why similar: Space Sim 28.4%, Procedural Generation 13%, Simulation 10.8%, Sandbox 10.3%, Science 9.2%
Perihelion lets you run your own rocket engine shop. Take over an abandoned desert airfield, design realistic, unique engines, then test them!
Why similar: Space Sim 32.6%, Sandbox 24.6%, Simulation 21.3%, Procedural Generation 7.2%, Space 6.1%
The most scientifically accurate space warfare simulator ever made. Now with Steam Workshop!
Why similar: Science 21.6%, Simulation 21.5%, Space Sim 16.7%, Space 15%, Realistic 8.9%
Realistic space flight simulator.
Why similar: Space Sim 27%, Science 15.2%, Simulation 13.1%, Sandbox 12.6%, Space 10.1%
Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!
Why similar: Space Sim 39.2%, Sandbox 17.2%, Simulation 14.5%, Space 11.9%, Science 6.6%
The accessible space-sim. Fly, fight, and trade through a galaxy where the prices and borders came from 700,000 days of astropolitical generation that keep ticking.
Why similar: Space Sim 37.3%, Simulation 13.9%, Space 11.4%, Sandbox 10.8%, Sci-fi 7.7%
A hard sci-fi survival sim where each decision costs power. Every system drains your dying reactor. Pilot a crippled spacecraft across a real-scale solar system using true orbital mechanics, manage critical systems, and fight to reach Earth — where space itself is the only enemy you need.
Why similar: Simulation 23.1%, Space Sim 21.8%, Sandbox 13.6%, Space 12.7%, Exploration 7.7%
You find yourself in a distant galaxy full of merchants, diplomats, bandits and powerful factions. Explore unknown galaxies, trade, fight pirates or become one. Uncover mysteries and shape the universe!
Why similar: Space Sim 41.7%, Sandbox 23.2%, Exploration 11.1%, Simulation 9.8%, Sci-fi 5.1%
Shape breathtaking worlds in Terra Firma 2, a vast simulation where your creations evolve through the forces of nature. Sculpt the land, then watch as weather, erosion, and life itself transform your world into a dynamic, living ecosystem- right down to every plant and creature.
Why similar: God Game 31.2% ★, Sandbox 19.8%, Science 15.3%, Simulation 14.1%, Nature 7.2%
Manipulate climate, add plants and evolve creatures in this planet and life sandbox simulation game. From cells to civilizations, spread life throughout the whole planet. Or just enjoy watching your creation burn!
Why similar: God Game 28.3% ★, Science 19.3%, Sandbox 16.1%, Procedural Generation 14.3%, Simulation 10.4%
A real-time 3D space simulator and interactive planetarium. Travel to any planet, moon, star, or galaxy and view it from any point in space and time. Accelerate time, land on alien worlds, and expand the universe with community-made add-ons.
Why similar: Space Sim 36.7%, Simulation 23.4%, Science 17.7%, Exploration 8.4%, Space 7.5%
Master physics in one compelling physics puzzle after another. Aim the launcher and adjust its power, using your understanding of gravity wells to correctly plot their courses in a variety of challenges. Complete a light-hearted story and then test yourself in the endless Expeditions mode.
Why similar: Space Sim 29.6%, Science 21.4%, Procedural Generation 15%, Space 10.8%, Simulation 10.2%
Use the Nimbatus Drone Creator to construct physically simulated drones and try them out in a virtual testing environment. Do you have what it takes to become a drone engineer?
Why similar: Simulation 23.7%, Space Sim 20.4%, Science 15.7%, Sandbox 14.2%, Procedural Generation 7.4%
A simple black hole simulator.
Why similar: Space Sim 28.4%, Sandbox 16.2%, Science 15.3%, Simulation 11.8%, Procedural Generation 8.7%
A co-op starship bridge sim for 6–25 players. Man a station — helm, weapons, sensors, engineering, comms or command — and no one can fly the ship alone. Communicate, coordinate, and survive together.
Why similar: Space Sim 30.6%, Sandbox 18.9%, Simulation 18.9%, Science 12.9%, Exploration 6.5%
Project Biosphere is a real-time ecosystem sandbox built on a falling-sand simulation. Water flows, heat spreads, fire consumes, plants take root. Ecosystems rise and fall.
Why similar: God Game 32.2% ★, Simulation 22.2%, Sandbox 17.8%, Science 10.2%, Procedural Generation 7.3%
Galactic Simulator 2: Stargate is a roguelite simulation game inspired by the Fermi Paradox and the Great Filter. Pilot your ship, gather resources, build stargates, and discover other civilizations as you explore an ever-evolving galaxy.
Why similar: Space Sim 27.5%, God Game 17.3% ★, Sandbox 14.4%, Simulation 13%, Space 10.9%
Space Sim Tycoon – A sandbox transportation tycoon game where you can explore forbidden planets, gather resources, craft goods, and establish routes to manage your space empire.
Why similar: Space Sim 32.6%, Simulation 22.9%, Sandbox 20.3%, Procedural Generation 10.6%, Space 7.4%
Simulate the physics of the Universe on a large scale and create stunning visuals. Play with intergalactic interactions, smash planets together and even create the Big Bang itself!
Why similar: Space Sim 30.9%, Simulation 25.5%, Sandbox 23.4%, Space 12.9%, Physics 5.8%
A fictional universe sandbox/exploration game. 🪐☄️✨ Shape your own solar system by terraforming planets. Find new species and make beautiful ecosystems . . . or breed destruction with volcanos, lightning storms and wildfires!
Why similar: God Game 26.6% ★, Space Sim 25.7%, Sandbox 15.7%, Simulation 11.5%, Space 8%
A "small" universe simulation, where you play as a black hole and try to absorb the whole universe. You decide the size and shape of the universe. Could also be used as a less meaningful CPU benchmark.
Why similar: Space Sim 45.3%, Simulation 22.2%, Space 13.7%, Sandbox 12.9%, Physics 4.2%
Design custom rockets and master 2D orbital mechanics to navigate a fully simulated solar system. Establish outposts, process local resources to launch interplanetary missions, and manage critical supply lines to keep your colony's workforce alive.
Why similar: Space Sim 29.7%, Sandbox 17.9%, Science 16.3%, Simulation 13%, Space 7.3%
