- #1 Juno: New Origins
97% matchVery Positive89% of 3,554 reviews2023
Dev: Jundroo, LLC
Windows · Mac
Median: 1.1 hrsMean: 13.6 hrs≥1hr: 52%
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
Why similar: Space Sim 41.5%, Sandbox 17.8%, Physics 16%, Space 11.6%, Simulation 10.2%
Why You'll Like It: This is the direct, modern successor to SimpleRockets, offering significantly expanded building and programming capabilities.
- #2 Kerbal Space Program
96% matchOverwhelmingly Positive96% of 147,368 reviews2015
Dev: SquadPub: Private Division
Windows · Mac · Linux
Median: 5.4 hrsMean: 66.3 hrs≥1hr: 84%
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 31%, Sandbox 20%, Space 17%, Physics 16.4%, Simulation 13.9%
Why You'll Like It: As the primary inspiration for SimpleRockets, this game provides the definitive experience for realistic rocket construction and orbital physics.
- #3 Spaceflight Simulator
96% matchOverwhelmingly Positive97% of 9,809 reviews2022
Dev: Team Curiosity ✦
Windows · Mac
Median: 5.3 hrsMean: 15.3 hrs≥1hr: 83%
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 41%, Sandbox 21.8%, Space 13.1%, Simulation 12%, Physics 8%
Why You'll Like It: This game offers a very similar 2D experience focused on building rockets and navigating orbital mechanics in a clean, accessible interface.
- #4 Tiny Space Academy
95% matchMixed64% of 55 reviews2021
Dev: Full Orbit Games LLC
Windows · Mac
Tiny Space Academy is a 2D space sim where you can grow your own space agency and explore our solar system with rockets you design! Learn basic orbital mechanics, run science experiments, and get your astronauts back to Earth safely.
Why similar: Space Sim 40.3%, Physics 20.9%, Simulation 16.7%, Space 16%, Indie 3.1%
Why You'll Like It: A charming 2D space simulation that captures the spirit of rocket building and exploration with a focus on cute, accessible gameplay.
- #5 Kerbal Space Program 2
94% matchMostly Negative26% of 32,033 reviews2023
Dev: Intercept GamesPub: Private Division
Windows
Median: 7.7 hrsMean: 19.4 hrs≥1hr: 86%
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 32.7%, Sandbox 21.4%, Physics 18.6%, Space 14.2%, Simulation 11.2%
Why You'll Like It: The modern iteration of the classic space-sim, featuring improved graphics and expanded interstellar travel mechanics.
- #6 Cosmoteer: Starship Architect & Commander
92% matchVery Positive94% of 12,916 reviews2022
Dev: Walternate Realities
Windows
Median: 19.3 hrsMean: 41.3 hrs≥1hr: 92%
Design and simulate the starships of your dreams! Command your ship or fleet in epic battles and manage your crew while exploring a dangerous galaxy. Play alone or with friends, test your ships in online PvP, and let your imagination reach for the stars!
Why similar: Space Sim 54.2%, Space 20.4%, Simulation 15.4%, Indie 5.1%, 2D 4.9%
Why You'll Like It: It emphasizes modular ship building and physics-based combat, perfect for those who enjoy the engineering aspect of space games.
- #7 Nimbatus - The Space Drone Constructor
93% matchMostly Positive79% of 2,173 reviews2020
Dev: Stray Fawn StudioPub: Stray Fawn Publishing
Windows · Mac · Linux
Median: 3.1 hrsMean: 5.1 hrs≥1hr: 84%
Command the Nimbatus and craft drones out of hundreds of different parts. Survive unknown threats in a fully destructible, procedural universe, compete against other players in different arenas or enjoy complete creative freedom in the sandbox.
Why similar: Space Sim 49.5%, Sandbox 18.8%, Physics 16.4%, Space 15.3%
Why You'll Like It: This game features deep, physics-based construction mechanics that allow for complex drone creation in a space setting.
- #8 0RBITALIS
94% matchMostly Positive72% of 308 reviews2015
Dev: Alan ZucconiPub: Mastertronic
Windows · Mac
Median: 1.0 hrsMean: 4.0 hrs≥1hr: 50%
0RBITALIS is a satellite launching simulator with a retro-puzzle style. Launch your satellite into orbit and go head to head with the dominant force that formed the entire universe: Gravity.
Why similar: Simulation 38.2%, Space 26.8%, Physics 25.1%, Indie 9.9%
Why You'll Like It: A puzzle game that focuses entirely on the beauty and challenge of orbital mechanics and gravity-based trajectories.
- #9 Solar 2
91% matchVery Positive91% of 2,235 reviews2011
Dev: Murudai
Windows · Mac · Linux
Median: 2.0 hrsMean: 4.4 hrs≥1hr: 71%
Dynamic abstract sandbox universe. Changes and evolves as you do.
Why similar: Sandbox 24.9%, Space Sim 22.5%, Space 22.1%, Physics 12.1%, Simulation 11.1%
Why You'll Like It: A physics-based sandbox that focuses on orbital mechanics and the growth of celestial bodies in a relaxing, minimalist environment.
- #10 Next Space Rebels
90% matchVery Positive85% of 365 reviews2021
Dev: Studio Floris KaaykPub: Balor Games
Windows · Mac
Median: 3.7 hrsMean: 7.5 hrs≥1hr: 96%
SPACE IS FOR EVERYONE. In Next Space Rebels, you will develop from a naive rocket hobbyist into an experienced space activist by designing, building, and launching rockets of increasing complexity.
Why similar: Simulation 44.9%, Physics 22.4%, Space 14.7%, Sandbox 12.5%, Indie 5.6%
Why You'll Like It: This game captures the DIY spirit of rocket building, focusing on the progression from small hobbyist rockets to complex space-faring vehicles.
- #11 Celestial Command
91% matchMixed62% of 705 reviews2014
Dev: Science Interactive
Windows · Linux
Median: 1.5 hrsMean: 6.3 hrs≥1hr: 62%
Mine asteroids, salvage space debris, design your own small or massive spacecraft using individual functional components, complete missions, and engage in battles against enemies in a vast galaxy with realistic physics based on orbital mechanics or in a classic physics mode.
Why similar: Space Sim 27.2%, Space 23.7%, Sandbox 23.1%, Simulation 21.8%, Indie 4.2%
Why You'll Like It: A space-sim that emphasizes realistic physics and modular ship building, allowing for complex engineering in a 2D environment.
- #12 Universe Sandbox
89% matchOverwhelmingly Positive96% of 32,344 reviews2015
Dev: Giant Army
Windows · Mac
Median: 2.3 hrsMean: 24.5 hrs≥1hr: 71%
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 37%, Sandbox 18.9%, Physics 16.9%, Space 12.3%, Simulation 12%
Why You'll Like It: An essential physics-based space simulator that lets you manipulate gravity, climate, and celestial bodies in a massive sandbox.
- #13 Rover Builder
89% matchMixed68% of 82 reviews2022
Dev: Hatfuls GamesPub: PQube
Windows
Rover Builder is a 3D engineering sim tasking you to create the right rover to complete the job. Unleash your creativity in the garage, building vehicles using an impressive array of parts, materials and machinery. Or try your hand at level editor - creating entire missions and levels from scratch!
Why similar: Sandbox 32.4%, Physics 27.4%, Simulation 18.8%, Space 18.4%, Indie 2.9%
Why You'll Like It: Focuses on the engineering and physics-based construction of vehicles designed to traverse challenging planetary terrain.
- #14 Orbit HD
88% matchMixed58% of 89 reviews2015
Dev: Brainchild
Windows · Mac · Linux
Median: 2.9 hrsMean: 3.4 hrs≥1hr: 76%
Explore the cosmos as a comet, orbiting planets with a realistic gravity system and a backdrop of procedurally generated nebulae. Learn to use planetary gravity to your advantage, and relax in the ambience of space.
Why similar: Space Sim 36%, Physics 19.6%, Space 15.5%, Sandbox 15%, Simulation 11.8%
Why You'll Like It: A relaxing puzzle game that centers on the physics of orbits and gravity, echoing the core mechanics of SimpleRockets.
- #15 Autocraft
87% matchMixed56% of 298 reviews2017
Dev: Alientrap
Windows · Mac
Median: 54 minMean: 3.2 hrs≥1hr: 44%
Create, Collect, and Crash in Autocraft, a physics destruction sandbox. Create your own cars, rockets, tanks, planes, boats, and more.
Why similar: Sandbox 29.5%, Physics 20%, Simulation 18.2%, Space Sim 16.5%, Space 12%
Why You'll Like It: A sandbox game that lets you build complex vehicles and machines using a robust physics engine.
- #16 Space Simulation Toolkit
86% matchVery Positive81% of 535 reviews2020
Dev: Pavel Kudinov
Windows
Physics sandbox game that uses a graphics card as a supercomputer. Change the laws of physics, design mechanisms, create A-Life worlds and inhabit them with living beings, experiment with evolution and AI.
Why similar: Space Sim 25.5%, Sandbox 22.3%, Physics 19.6%, Simulation 18.4%, Space 8.4%
Why You'll Like It: Provides a sandbox environment specifically for testing physics and orbital mechanics in a space setting.
- #17 Main Assembly
85% matchVery Positive83% of 1,355 reviews2021
Dev: Bad Yolk GamesPub: Team17
Windows
Median: 54 minMean: 7.0 hrs≥1hr: 50%
You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions.
Why similar: Sandbox 42%, Physics 33.9%, Simulation 24.1%
Why You'll Like It: Offers advanced, physics-based construction tools that allow players to build complex robots and vehicles from scratch.
- #18 Trailmakers
84% matchVery Positive92% of 39,576 reviews2019
Dev: Flashbulb
Windows
Median: 3.9 hrsMean: 15.5 hrs≥1hr: 86%
Build the ultimate vehicle and explore a vast open world filled with challenges and adventure. Play solo or team up with friends in multiplayer to conquer the toughest obstacles. With a thrilling campaign mode and endless creative possibilities, Trailmakers is the ultimate sandbox for adventurers.
Why similar: Space 35.5%, Sandbox 34%, Physics 30.5%
Why You'll Like It: A highly creative physics-based building game that allows you to construct vehicles for land, sea, and air exploration.
- #19 Scrap Mechanic
80% matchVery Positive92% of 123,030 reviews2026
Dev: Axolot Games
Windows
Median: 11.5 hrsMean: 65.6 hrs≥1hr: 91%
Enter the creative paradise of Scrap Mechanic! Build fantastic machines, go on adventures with your friends and defend against waves of evil Farmbots in this imaginative multiplayer survival sandbox. With Scrap Mechanic’s powerful creation tools you can engineer your own adventures!
Why similar: Sandbox 44%, Physics 37.1%, Simulation 15.2%, Indie 3.8%
Why You'll Like It: Offers a highly interactive physics engine that is perfect for players who enjoy the engineering and construction aspects of sandbox games.
- #20 Satellite Command
86% matchMixed64% of 81 reviews2016
Dev: Stormtide
Windows
Satellite Command is a realistic, relaxing astrophysics simulator. Complete contracts with real data, launch and take control of ever more powerful Satellites, research advanced technology and build your Space Agency!
Why similar: Space Sim 35%, Sandbox 19.7%, Physics 16.1%, Simulation 13.1%, Space 12.6%
Why You'll Like It: A simulation game that focuses on the management and orbital maintenance of satellites, highlighting the technical side of space flight.
- #21 Reassembly
84% matchVery Positive94% of 4,100 reviews2015
Dev: Anisoptera GamesPub: Indie Voyage
Windows · Mac · Linux
Median: 5.0 hrsMean: 26.1 hrs≥1hr: 84%
A spaceship building and universe-exploration game. Collect resources, expand and grow your fleet, and conquer your personal galaxy. Stellar ambience by Peaks.
Why similar: Sandbox 46.2%, Space 33.4%, Physics 6.9%, 2D 5.7%, Indie 5.1%
Why You'll Like It: A unique space-sim that combines modular ship building with physics-based combat and procedural exploration.
- #22 Besiege
82% matchOverwhelmingly Positive95% of 53,310 reviews2020
Dev: Spiderling Studios
Windows · Mac · Linux
Median: 2.4 hrsMean: 18.7 hrs≥1hr: 71%
Besiege is a physics building game about constructing medieval machines to annihilate armies, obliterate castles and overcome challenging obstacles. Conquer the campaign or skirmish with friends in Multiplayer!
Why similar: Sandbox 39.6%, Physics 35.4%, Simulation 25%
Why You'll Like It: While set in a medieval context, its core appeal is the same physics-based construction and engineering challenge found in rocket sims.
- #23 Interstellar Pilot 2
83% matchVery Positive90% of 162 reviews2023
Dev: Pixelfactor Ltd.
Windows
The hit mobile game Interstellar Pilot 2 has come to Steam. Join the TEF forces heading to the Gatopean sector to find a new home for mankind. Play how you like in this open world space-sim developed by Pixelfactor.
Why similar: Space Sim 41.6%, Sandbox 23.2%, Simulation 22.6%, Space 10.5%, Indie 2.1%
Why You'll Like It: A space-sim that offers a sandbox experience with a focus on ship management and exploration in a vast universe.
- #24 TerraTech
81% matchVery Positive91% of 25,032 reviews2018
Dev: Payload StudiosPub: Mythwright
Windows · Mac · Linux
Median: 7.7 hrsMean: 32.4 hrs≥1hr: 90%
TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector.
Why similar: Sandbox 70.9%, Physics 24.1%, Indie 5%
Why You'll Like It: Focuses on modular vehicle building and exploration, rewarding players for creative engineering and efficient design.
- #25 Space Mechanic Simulator
82% matchMixed63% of 122 reviews2023
Dev: Atomic JellyPub: Wildlands Interactive
Windows
Median: 3.9 hrsMean: 16.6 hrs≥1hr: 84%
Become a Space Mechanic! Get your hands dirty, explore the depths of space and repair broken machinery. Diagnose problems using diagrams and tools, perform repairs, manage your resources and watch the simulated machinery come alive. Or just gaze upon the beauty of the Solar System.
Why similar: Space Sim 47.7%, Simulation 16.3%, Space 16.3%, Physics 15.7%, Indie 4%
Why You'll Like It: Focuses on the maintenance and repair of space equipment, appealing to players who enjoy the technical side of space operations.
- #26 Rogue System
81% matchMixed67% of 275 reviews2022
Dev: Digits Crossed Interactive, LLCPub: Image Space Incorporated
Windows
Our goal is to depict the possibilities of space exploration & combat within a realistic environment- to emphasize the "science" in science-fiction. Key features to include: proper orbital mechanics for all objects in space, detailed ship system control, functionality, inter-dependency & damage reaction.
Why similar: Space Sim 61.5%, Simulation 27.4%, Space 11.2%
Why You'll Like It: A highly realistic space-sim that focuses on the intricate systems and operation of a spacecraft.
- #27 Stationeers
79% matchVery Positive88% of 9,306 reviews2017
Dev: RocketWerkz
Windows
Median: 9.8 hrsMean: 85.8 hrs≥1hr: 85%
Stationeers puts you in control of the construction and management of a space station to run by yourself or online with your friends. Complex atmospheric, electrical, manufacturing, agriculture, and gravitational systems require your thought and management at all times!
Why similar: Sandbox 38.9%, Physics 36.1%, Space 25%
Why You'll Like It: A complex engineering simulation that requires deep knowledge of systems, power, and atmosphere management in space.
- #28 Solar Expanse - Space Exploration Manager
75% matchVery Positive87% of 1,372 reviews2026
Dev: SpaceOpsPub: Games Operators
Windows
Median: 4.6 hrsMean: 16.0 hrs≥1hr: 75%
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 33.1%, Sandbox 19.8%, Physics 17.3%, Space 14.3%, Simulation 12.7%
- #29 Rover Mechanic Simulator
78% matchMostly Positive76% of 671 reviews2020
Dev: ▲ Pyramid GamesPub: Pyramid Games S.A.
Windows
Median: 4.4 hrsMean: 5.8 hrs≥1hr: 93%
As an Engineer - crew member of one of the first Mars colonies - you are responsible for repairing and maintaining Mars Rovers. In this advanced simulator you will learn the internal details of various Mars Rovers and their components.
Why similar: Space Sim 53.5%, Simulation 21.5%, Space 19.5%, Indie 5.5%
Why You'll Like It: A detailed simulation of repairing and maintaining space rovers, focusing on the mechanical engineering aspect of space exploration.
- #30 StarbaseSim
76% matchVery Positive95% of 62 reviews2025
Dev: AshtorakSimGames
Windows · Linux
Operate the Starship space launch system and learn how to catch a rocket to understand what it takes to colonize Mars in this ever-evolving simulation of SpaceX Starbase Texas.
Why similar: Space Sim 44.6%, Sandbox 23%, Simulation 16.9%, Space 8.1%, Physics 7.5%
- #31 ΔV: Rings of Saturn
75% matchVery Positive92% of 3,475 reviews2023
Dev: Kodera Software
Windows · Mac · Linux
Median: 8.3 hrsMean: 11.8 hrs≥1hr: 85%
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 37.7%, Physics 19.3%, Space 15.9%, Sandbox 14.2%, Simulation 10.5%
- #32 Space Station Designer
78% matchNo user reviews2026
Dev: Polar MotionPub: Slitherine Ltd.
Windows
Design, expand, and manage a network of space stations across Earth orbit and beyond. In Space Station Designer, you’ll take the lead of a private aerospace company, managing astronauts and logistics, unlocking advanced technologies, and shaping the future of humanity in space.
Why similar: Sandbox 39%, Simulation 33.1%, Space 27%, Indie 1%
Why You'll Like It: Focuses on the structural engineering and management of space habitats, appealing to those who enjoy the building aspect of space sims.
- #33 Space Station Manager
79% matchMixed44% of 77 reviews2020
Dev: Ondrej Hroch
Windows
Space Station Manager is an exciting game where you own a space company, your main goal is to build a space station, make profit, grow your business, build an economical network, and expand beyond the solar system.
Why similar: Simulation 65.5%, Space 17.6%, Indie 16.9%
Why You'll Like It: Combines the construction and management of space stations with a focus on the logistical challenges of living in space.
- #34 Rocket Science
77% matchVery Positive81% of 176 reviews2020
Dev: unbeGames
Windows
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 36%, Sandbox 20.3%, Physics 17.9%, Space 13.9%, Simulation 11.8%
- #35 Space Sprouts
73% matchVery Positive97% of 70 reviews2025
Dev: Schleuder Games
Windows · Mac
Launch into a chaotic spaceship adventure: bend the rules of physics, experiment with unusual gadgets and toss everything around. With each journey, you will have limited time to reveal the mysteries aboard your solar punk spaceship - how much will you discover before you arrive home?
Why similar: Space Sim 35.8%, Sandbox 18.6%, Physics 17.8%, Simulation 12.2%, Space 10%
- #36 Space Engineers 2
71% matchMostly Positive75% of 5,654 reviews2025
Dev: Keen Software House
Windows
Median: 2.0 hrsMean: 11.6 hrs≥1hr: 64%
Space Engineers 2 is a playable Early Access Alpha sandbox focused on engineering, exploration, and colonization in a fully destructible universe. Design and build ships, stations, and planetary bases while uncovering the story of Miro and Ivan Sokol. Help shape the future of the Almagest system.
Why similar: Space Sim 30.1%, Sandbox 22.6%, Physics 17.9%, Space 14.2%, Simulation 12.6%
- #37 Space Mechanic Simulator: Prologue
74% matchMostly Positive80% of 64 reviews2023
Dev: Atomic JellyPub: Wildlands Interactive
Windows
Space Mechanic Simulator: Prologue is a story prelude to the full version, which will introduce you to the world of cosmic repairs, greedy corporations, and cutting-edge technology.
Why similar: Space Sim 60.6%, Simulation 21.5%, Space 17.9%
- #38 Space Simulator
76% matchMostly Negative37% of 163 reviews2018
Dev: Stuka Games IncPub: Brixton Dynamics Ltd
Windows
Realistic simulation of spaceflight in a full sized Solar System, with all the planets and their major moons. using real forces, distances, velocities and time. Chapter 1: The Apollo Days. Incredibly detailed Apollo Program missions starting with Apollo 8 lunar orbit missions.
Why similar: Space Sim 43.2%, Simulation 35.4%, Space 21.4%
- #39 Cosmic Drift
70% matchVery Positive98% of 93 reviews2025
Dev: Shakawah
Windows
Launch rockets into orbit around planets, find a good trajectory, and take risks to increase your score! Play solo, online, or even on Twitch!
Why similar: Space Sim 40%, Physics 21.5%, Space 18.6%, Simulation 17.3%, 2D 2.5%
- #40 Endless Sky
72% matchVery Positive92% of 7,114 reviews2015
Dev: Michael Zahniser
Windows · Mac · Linux
Median: 1.0 hrsMean: 13.7 hrs≥1hr: 50%
Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.
Why similar: Space 36.4%, Space Sim 32.1%, Simulation 13.9%, Sandbox 12%, 2D 3.4%
- #41 SimplePlanes
71% matchVery Positive93% of 10,914 reviews2015
Dev: Jundroo, LLC
Windows · Mac
Median: 2.5 hrsMean: 12.6 hrs≥1hr: 74%
Build airplanes by snapping parts together, designing wing sections, and attaching engines. At any time, you can strap yourself into the cockpit and see how it flies with realistic physics. If you're not in the mood for building, over 100,000 airplanes are available to download for free.
Why similar: Sandbox 53.2%, Physics 46.8%
- #42 The Sandbox
74% matchMixed55% of 575 reviews2015
Dev: PIXOWL INC.
Windows
Median: 1.2 hrsMean: 5.9 hrs≥1hr: 55%
READY FOR CRAFTING VIRTUAL WORLDS ON YOUR PC?The acclaimed world-building game featuring a unique mission-based approach is coming onto PC via Steam Early Access. With over 16 million players on mobile & tablets versions and 1,500,000 pixel blocks creations shared in the Online Gallery to date, this PC version is taking world...
Why similar: Sandbox 64.2%, Simulation 22.4%, Physics 7%, Indie 5.1%, 2D 1.2%
- #43 Inspiral: Echoes of Gravity
70% matchMostly Positive73% of 67 reviews2025
Dev: PcZ Games
Windows · Mac
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 34.9%, Sandbox 18.2%, Physics 17.9%, Space 14.4%, Simulation 13.2%
- #44 Kselebox
72% matchMostly Positive75% of 68 reviews2021
Dev: KseLeroNPub: ONRI Studio
Windows
Kselebox is a sandbox game, which means you can do whatever you want in it! You can build a rocket and go to explore the vastness of space. Or maybe you want to build a huge car? No problem! Players can save their buildings and then publish them to the Steam Workshop.
Why similar: Sandbox 36.1%, Physics 28.7%, Simulation 23.2%, 2D 6.1%, Indie 5.8%
- #45 The Last Starship
67% matchMostly Positive75% of 1,705 reviews2026
Dev: Introversion Software
Windows · Mac
Median: 6.1 hrsMean: 12.3 hrs≥1hr: 81%
The Last Starship is a 2D space construction game where you design and upgrade your starship. Choose your path: pirate hunter, miner, engineer, spacebus driver, and more, whilst exploring vibrant star systems. Enjoy a growing sandbox world, with regular free updates. Your cosmic adventure awaits!
Why similar: Space Sim 42.8%, Sandbox 22.4%, Space 14.5%, Simulation 13.9%, 2D 3.4%
- #46 Void Destroyer 2
71% matchVery Positive80% of 675 reviews2020
Dev: Iteration 11
Windows
Median: 2.8 hrsMean: 15.3 hrs≥1hr: 74%
Start with nothing... End with everything! All you have is a basic ship, barely fit for combat, with it you'll start your journey and empire. A open world space sandbox, inspired by and expanding the classics.
Why similar: Space Sim 47.1%, Sandbox 22.8%, Space 13.5%, Simulation 13.3%, Indie 3.3%
- #47 Space Rocket
73% matchMixed54% of 71 reviews2018
Dev: RewindApp
Windows
Median: 18 minMean: 5.4 hrs≥1hr: 40%
Set off to conquer space with Space Rocket, an ultra addictive rocket game!
Why similar: Simulation 49.9%, Indie 37.5%, 2D 12.6%
- #48 Reentry - A Space Flight Simulator
66% matchOverwhelmingly Positive97% of 1,372 reviews2025
Dev: Lyra Creative
Windows
Median: 2.2 hrsMean: 6.7 hrs≥1hr: 72%
Do you have what it takes to become an astronaut? Reentry is a realistic space flight simulator inspired by the early NASA space programs, from orbiting Earth in Mercury and Gemini, to the moon landing in project Apollo. Learn the procedures. Operate the spacecraft. Complete the mission.
Why similar: Space Sim 48.9%, Space 17.5%, Physics 17.2%, Simulation 16.4%
- #49 Aviassembly
65% matchOverwhelmingly Positive97% of 9,569 reviews2025
Dev: Jelle Booij
Windows
Median: 6.3 hrsMean: 7.5 hrs≥1hr: 82%
Build and fly your own airplane! Complete missions to earn money, upgrade your plane, and discover new locations in an open world.
Why similar: Sandbox 41.2%, Physics 39.2%, Simulation 17.3%, Indie 2.4%
- #50 Little Rocket Lab
65% matchVery Positive91% of 1,324 reviews2025
Dev: Teenage AstronautsPub: No More Robots
Windows
Median: 8.2 hrsMean: 14.0 hrs≥1hr: 83%
Transform your childhood home as you build brilliant factories and forge lifelong friendships, then reach for the skies and finally finish your family's dream - your mother's precious rocket ship. Roll up your sleeves, it turns out that saving this town really IS rocket science!
Why similar: Sandbox 76.7%, Simulation 12.9%, 2D 10.4%
- #51 EarthX
67% matchVery Positive88% of 921 reviews2023
Dev: DenisPub: Mesote Games
Windows · Mac · Linux
Median: 6.4 hrsMean: 18.5 hrs≥1hr: 93%
EarthX is a rocket company management game. Go from launching small rockets on Earth to eventually building a colony on Mars. Create your own Internet constellation, develop new technologies, supply the International Space Station and terraform Mars!
Why similar: Space Sim 53%, Simulation 20.9%, Space 20.7%, Indie 5.4%
- #52 PixPhys
69% matchMostly Positive74% of 218 reviews2021
Dev: Red Starship
Windows · Linux
PixPhys is a 2D engineering sandbox with huge technical possibilities and scope for imagination: design equipment from a jet-powered cart to space stations.
Why similar: Sandbox 30.8%, Physics 26.3%, Space 18.3%, Simulation 17.2%, 2D 3.8%
- #53 Nimbatus - Drone Creator
69% matchVery Positive91% of 275 reviews2020
Dev: Stray Fawn Studio
Windows · Mac · Linux
Median: 42 minMean: 5.3 hrs≥1hr: 41%
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: Space Sim 27.9%, Simulation 26.1%, Sandbox 16.9%, Physics 13.8%, Space 8.7%
- #54 SimplePlanes 2
63% matchVery Positive92% of 1,439 reviews2026
Dev: Jundroo, LLC
Windows · Mac
Median: 1.5 hrsMean: 9.0 hrs≥1hr: 56%
SimplePlanes is back! Build planes, cars, or anything else using powerful procedural parts! Explore detailed environments with friends in multiplayer, cause chaos, or download 1,000,000 community crafts for free.
Why similar: Sandbox 60.4%, Simulation 39.6%
- #55 Sector Space
64% matchVery Positive93% of 149 reviews2025
Dev: Robin M. FarrellPub: Outer Vision Games
Windows · Linux
Explore a procedurally generated galaxy, mine asteroids, refine minerals, colonize planets, build stations, deploy drones, salvage rare items, construct gear, level up, improve your ship, assemble a fleet, engage in combat, and take on the void.
Why similar: Space Sim 60.5%, Simulation 27%, Space 6.8%, 2D 3.3%, Indie 2.4%
- #56 Galactic Lander
68% matchVery Positive92% of 122 reviews2018
Dev: ZeroByter Games
Windows
Inspired by the classic arcade Lunar Lander game, in Galactic Lander you control a delicate scientific spaceship which you must deliver from point A to point B, either alone, or with a friend in a co-op level, potentially made by the game's own Steam Workshop community!
Why similar: Space 71.5%, 2D 15.1%, Indie 13.5%
- #57 Rodina
68% matchVery Positive93% of 1,333 reviews2014
Dev: Elliptic Games
Windows
Median: 2.9 hrsMean: 6.3 hrs≥1hr: 72%
A single-developer passion project. A seamless full scale solar system. Thrilling action. Be part of an incredible journey as a Universe is built from the ground up!
Why similar: Space Sim 32%, Space 30.2%, Sandbox 26.3%, Simulation 6.1%, Indie 5.4%
- #58 eXoSpace Combat Engineer
63% matchVery Positive87% of 125 reviews2026
Dev: Fantastimaker
Windows
Snap, rotate and launch your own warship in minutes, then pilot it into bullet-hell boss fights to hunt the galaxy's supervillains. Master intuitive engineering, evolve from drone to dreadnought, and use the fully gridless designer to build anything you can imagine!
Why similar: Space Sim 38.5%, Sandbox 16.2%, Physics 15.4%, Space 13.5%, Simulation 11.7%