Games like Kerbal Space Program on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Kerbal Space Program are available at the bottom of the page.
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Universe Sandbox
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.
SimpleRockets
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.
Spaceflight Simulator
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
Rover Mechanic Simulator
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.
Astrox Imperium
Astrox Imperium is a relaxing space game where you fly around a generated universe. Mining, Fighting, Building, Exploring, and Surviving. What makes this game unique? You have complete control of how it plays. A robust sandbox and lots of MOD tools. Make it your game, and play it your own way.
Astrox: Hostile Space Excavation
Exiled to a deep space mining sector, you are left with a crappy ship, a laser, and a small mining beam. It is up to you to survive by working your way through the galaxy. Mine asteroids, refine and trade the ore, buy upgrades for your ship, hunt pirates... you get it.
Hardspace: Shipbreaker
Equipped with cutting-edge salvaging tech, carve & slice spaceships to recover valuable materials. Upgrade your gear to take on more lucrative contracts and pay your billion credits debt to LYNX Corp!
Space Simulation Toolkit
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.
GearBlocks
Explore a world of creative building, interactive machines, and gears - lots of gears. Build all things mechanical: cars, trucks, cranes, tanks, gearboxes, engines, clocks, anything you can think of. Test your creations to destruction in challenging scenarios, and share them in the workshop!
Evochron Mercenary
The life of an independent mercenary is rarely without excitement. Your spacecraft awaits and your adventure begins in the Sapphire star system.
X3: Terran Conflict
It is the year 2938. The long wished-for encounter of the X Universe and the Earth holds both joy and sorrow for the people. Despite flourishing trade, the clash of the diverse races, cultures and life forms creates new tensions, mistrust and open conflict that need to be overcome!
Space Engineers
Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.
Fun with Ragdolls: The Game
Become a ragdoll and create your own environments in Sandbox Mode, explore worlds created by others, or just flop around your destructible sets! Fun with Ragdolls: The Game lets you enjoy everything you love about ragdolls!
X3: Reunion
X3: Reunion continues the epic space saga, blending deep space trading and intense real-time combat. Explore a vast universe, establish your empire, and shape the new frontier. With enhanced graphics and intricate economies, it's a journey of strategy, simulation, and interstellar intrigue.
Evochron Legacy SE
Advanced Space Flight, Combat, Trading, and Exploration Simulation. Set in a vast explorable universe, Evochron Legacy offers freeform gameplay with many diverse objectives and paths to choose from.
Poly Bridge
Unleash your engineering creativity with an engaging and fresh bridge-building simulator with all the bells and whistles. Enjoy hours of physics-based puzzle solving in the Campaign and then jump in the Sandbox to create your own bridge designs and puzzles!
Empyrion - Galactic Survival
Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!
Poly Bridge 2
The acclaimed bridge-building indie-hit is back! More levels, more features, more physics fun!
The Powder Toy
The Powder Toy is a classic physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances
The Last Starship
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!
ACTION SANDBOX
A physics sandbox game for people who like to play with digital toys. Create, control toys and define your goals.
Sinking Simulator
The sequel to the unfinished Sinking Simulator, now with a lot more POWER!!!! Witness your witty love of chaos and destruction sinking 2D ships and everything else on board!
Most played games like Kerbal Space Program on Steam
Take a look at the top games like Kerbal Space Program that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.
1. Garry's Mod
Similarity 56% Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play. Garry's Mod is a sandbox, moddable and multiplayer game developed by Facepunch Studios and published by Valve. Released on November 29th 2006 has received 1,159,707 reviews of which 1,122,546 were positive and 37,161 were negative resulting in an impressive rating of 9.6 out of 10. The game has hit the top spot as the #1 most played game like Kerbal Space Program, thanks to its 22,299 peak concurrent players over the last day.
9.6
1,122,546
37,161
22,299
players
2. BeamNG.drive
Similarity 50% A dynamic soft-body physics vehicle simulator capable of doing just about anything. BeamNG.drive is a simulation, driving and physics game developed and published by BeamNG. Released on May 29th 2015 has received 322,278 reviews of which 313,873 were positive and 8,405 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 17,051 players online at once in the last 24 hours, this game is currently ranked #2 among games like Kerbal Space Program based on player count.
9.6
313,873
8,405
17,051
players
3. Stellaris
Similarity 40% Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities. Stellaris is a space, grand strategy and strategy game developed by Paradox Development Studio and published by Paradox Interactive. Released on May 09th 2016 has received 185,433 reviews of which 159,527 were positive and 25,906 were negative resulting in a rating of 8.5 out of 10. While seeing 15,712 players online at once in the last 24 hours, this game is currently ranked #3 among games like Kerbal Space Program based on player count.
8.5
159,527
25,906
15,712
players
4. RoadCraft
Similarity 42% As the leader of a company specialized in restoring sites devastated by natural disasters, use your construction machinery to restart the local industry. Clear debris and faulty equipment, rebuild roads and bridges damaged by weather, and much more! RoadCraft is a simulation, building and driving game developed by Saber Interactive and published by Focus Entertainment. Released on May 20th 2025 has received 7,668 reviews of which 5,784 were positive and 1,884 were negative resulting in a rating of 7.4 out of 10. With 8,172 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Kerbal Space Program.
7.4
5,784
1,884
8,172
players
5. Cities: Skylines
Similarity 43% Cities: Skylines is a modern take on the classic city simulation. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience. Cities: Skylines is a city builder, simulation and building game developed by Colossal Order Ltd. and published by Paradox Interactive. Released on March 10th 2015 has received 275,770 reviews of which 256,362 were positive and 19,408 were negative resulting in an impressive rating of 9.2 out of 10. With 6,752 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Kerbal Space Program.
9.2
256,362
19,408
6,752
players
6. Space Engineers
Similarity 63% Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive. Space Engineers is a space, sandbox and building game developed and published by Keen Software House. Released on February 28th 2019 has received 132,347 reviews of which 117,204 were positive and 15,143 were negative resulting in a rating of 8.8 out of 10. With 5,146 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Kerbal Space Program.
8.8
117,204
15,143
5,146
players
7. Elite Dangerous
Similarity 44% Take control of your own starship in a cutthroat galaxy. Elite Dangerous is the definitive massively multiplayer space epic. Elite Dangerous is a space sim, space and open world game developed and published by Frontier Developments. Released on April 02nd 2015 has received 100,024 reviews of which 77,388 were positive and 22,636 were negative resulting in a rating of 7.7 out of 10. With 4,961 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Kerbal Space Program.
7.7
77,388
22,636
4,961
players
8. People Playground
Similarity 51% Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space. People Playground is a sandbox, gore and physics game developed by mestiez and published by Studio Minus. Released on July 23rd 2019 has received 281,763 reviews of which 277,746 were positive and 4,017 were negative resulting in an impressive rating of 9.8 out of 10. With 4,762 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Kerbal Space Program.
9.8
277,746
4,017
4,762
players
9. WorldBox - God Simulator
Similarity 40% WorldBox is the ULTIMATE god simulator and sandbox game. A petri dish for your fantasy civilizations. Create your own world or destroy it using many powers. Watch civilizations grow, form kingdoms, colonize new lands, sail to far continents, wars to ignite, empires to fall and towns to burn! WorldBox - God Simulator is a sandbox, god game and simulation game developed and published by Maxim Karpenko. Released on December 02nd 2021 has received 44,062 reviews of which 41,874 were positive and 2,188 were negative resulting in an impressive rating of 9.3 out of 10. With 4,138 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Kerbal Space Program.
9.3
41,874
2,188
4,138
players
10. Planet Zoo
Similarity 44% Build a world for wildlife in Planet Zoo. From the developers of Planet Coaster and Zoo Tycoon comes the ultimate zoo sim. Construct detailed habitats, manage your zoo, and meet authentic living animals who think, feel and explore the world you create around them. Planet Zoo is a management, simulation and building game developed and published by Frontier Developments. Released on November 05th 2019 has received 87,849 reviews of which 80,029 were positive and 7,820 were negative resulting in a rating of 9.0 out of 10. With 2,637 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Kerbal Space Program.
9.0
80,029
7,820
2,637
players
Best deals on games like Kerbal Space Program on Steam
Discover fantastic savings with the best discounts on a variety of games like Kerbal Space Program available on Steam right now, updated on June 15th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Kerbal Space Program.
1. EarthX
Similarity 51% 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! EarthX is a simulation, indie and strategy game developed by Denis and Ry and published by Mesote Games. Released on July 12th 2023 has received 875 reviews of which 769 were positive and 106 were negative resulting in a rating of 8.3 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Kerbal Space Program.
8.3
769
106
-99%
19.99€
0.29€
2. Size Matters
Similarity 52% You play as a scientist who is shrinking every second in a race against time! Find all the ingredients and formulas scattered around the laboratory, which are necessary for producing the life-saving antidote. But beware, your time is very precious. Size Matters is a simulation, casual and science game developed by Mazen Games and published by GrabTheGames. Released on March 12th 2021 has received 473 reviews of which 412 were positive and 61 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in games like Kerbal Space Program.
8.1
412
61
-99%
9.75€
0.19€
3. InfraSpace
Similarity 41% Create an extrasolar efficiency utopia from scratch! In this sci-fi city builder you need to start mining operations, plan production, and lay down transportation routes to ensure a smooth supply chain. InfraSpace is a city builder, automation and transportation game developed and published by Dionic Software. Released on September 22nd 2023 has received 1,667 reviews of which 1,333 were positive and 334 were negative resulting in a rating of 7.7 out of 10. Thanks to its incredible 99% discount, this game is now the #3 best deal in games like Kerbal Space Program.
7.7
1,333
334
-99%
19.99€
0.38€
4. Starpoint Gemini Warlords
Similarity 50% Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system! Starpoint Gemini Warlords is a space, rpg and open world game developed and published by Little Green Men Games. Released on May 23rd 2017 has received 3,532 reviews of which 2,593 were positive and 939 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for games like Kerbal Space Program.
7.1
2,593
939
-99%
31.99€
0.47€
5. Starpoint Gemini 2
Similarity 56% Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever. Starpoint Gemini 2 is a space, simulation and rpg game developed and published by Little Green Men Games. Released on September 26th 2014 has received 4,093 reviews of which 2,843 were positive and 1,250 were negative resulting in a rating of 6.8 out of 10. Currently offered at a significant 99% discount, this title has earned the #5 position in the best deals for games like Kerbal Space Program.
6.8
2,843
1,250
-99%
31.99€
0.60€
6. Main Assembly
Similarity 41% 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. Main Assembly is a 3d, online co-op and co-op game developed by Bad Yolk Games and published by Team17. Released on January 26th 2021 has received 1,314 reviews of which 1,115 were positive and 199 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for games like Kerbal Space Program.
8.1
1,115
199
-98%
19.99€
0.42€
7. Tin Can
Similarity 48% You've barely managed to escape your exploding spaceship. Now in an old escape pod, you hurtle through space at the mercy of the cosmos. With no knowledge of the pod’s complex systems, your life depends on a technical manual and your own wits. How long can you survive? Tin Can is a simulation, space and survival game developed by Tin Can Studio and published by Tin Can Studio and IndieArk. Released on May 12th 2022 has received 1,198 reviews of which 1,015 were positive and 183 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for games like Kerbal Space Program.
8.1
1,015
183
-98%
17.99€
0.46€
8. Black Skylands
Similarity 45% Become the captain of an airship and explore the world of the skies, gather resources and build powerful weapons, uncover ancient secrets and fight beneath your ship's sails. Black Skylands is a pixel graphics, open world and sandbox game developed by Hungry Couch Games and published by tinyBuild. Released on August 15th 2023 has received 3,894 reviews of which 3,236 were positive and 658 were negative resulting in a rating of 8.0 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like Kerbal Space Program.
8.0
3,236
658
-98%
19.50€
0.45€
9. Rover Mechanic Simulator
Similarity 71% 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. Rover Mechanic Simulator is a simulation, indie and building game developed by ▲ Pyramid Games and published by Pyramid Games S.A. and PlayWay S.A.. Released on November 12th 2020 has received 637 reviews of which 489 were positive and 148 were negative resulting in a rating of 7.3 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for games like Kerbal Space Program.
7.3
489
148
-98%
11.79€
0.35€
10. Ascent - The Space Game
Similarity 47% Ascent is a PVE sandbox space MMO with 270 BILLION star systems and an emphasis on strong Sci Fi. It encourages Exploration, Colonization, Research, Asteroid mining, Farming, Trading, and Combat. Outside the tutorial sector, everything in-game has been built by players. Ascent - The Space Game is a space, massively multiplayer and simulation game developed and published by Fluffy Kitten Studios. Released on April 11th 2016 has received 340 reviews of which 231 were positive and 109 were negative resulting in a rating of 6.5 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for games like Kerbal Space Program.
6.5
231
109
-98%
19.99€
0.52€
Free games like Kerbal Space Program on Steam
Check out this fantastic list of free-to-play games like Kerbal Space Program you can enjoy on Steam right now, updated on June 15th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Kerbal Space Program.
1. OpenTTD
Similarity 40% OpenTTD is a business simulation game in which players earn money by transporting passengers and cargo via road, rail, water, and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe. OpenTTD is a simulation, building and free to play game developed and published by OpenTTD. Released on April 01st 2021 has received 14,394 reviews of which 13,845 were positive and 549 were negative resulting in an impressive rating of 9.4 out of 10. With 556 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Kerbal Space Program.
9.4
13,845
549
556
players
2. Learn to Fly 3
Similarity 47% Build your spaceship from scratch, earn funds and invest them into building a bigger, better spaceship as you try and fly your way up to space! Learn to Fly 3 is a free to play, casual and physics game developed and published by Light Bringer Games inc.. Released on May 12th 2017 has received 10,406 reviews of which 9,843 were positive and 563 were negative resulting in an impressive rating of 9.2 out of 10. Thanks to its free to play tag and a daily player base of 113, this game has secured the #2 spot in the ranking of free games like Kerbal Space Program.
9.2
9,843
563
113
players
3. The Powder Toy
Similarity 59% The Powder Toy is a classic physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances The Powder Toy is a simulation, sandbox and 2d game developed and published by The Powder Toy Team. Released on June 14th 2024 has received 1,852 reviews of which 1,824 were positive and 28 were negative resulting in an impressive rating of 9.4 out of 10. The game currently holds the #3 spot among the most played free games like Kerbal Space Program.
9.4
1,824
28
89
players
4. Steam Engine Simulator
Similarity 50% The Steam Engine Simulator shown on AngeTheGreat's YouTube channel. Steam Engine Simulator is a simulation, physics and education game developed and published by Ektorom Software Inc.. Released on June 07th 2023 has received 8,278 reviews of which 8,183 were positive and 95 were negative resulting in an impressive rating of 9.6 out of 10. The game currently holds the #4 spot among the most played free games like Kerbal Space Program.
9.6
8,183
95
23
players
5. SuchArt: Creative Space
Similarity 49% Paint on any surfaces with numerous tools in Creative Space — a free sandbox version of SuchArt: Genius Artist Simulator. Create masterpieces, complete commissions, and decorate your studio in the most advanced artist sim! SuchArt: Creative Space is a simulation, free to play and sandbox game developed by Goose Minded and published by HypeTrain Digital. Released on January 21st 2021 has received 7,016 reviews of which 6,872 were positive and 144 were negative resulting in an impressive rating of 9.5 out of 10. The game currently holds the #5 spot among the most played free games like Kerbal Space Program.
9.5
6,872
144
14
players
6. Plasma
Similarity 40% Plasma is a pure engineering sandbox. Use advanced visual programming and robotics tools to create anything you can imagine. Plasma is a simulation, sandbox and 3d game developed by Dry Cactus and Licorice ehf and published by Dry Licorice. Released on September 13th 2023 has received 888 reviews of which 789 were positive and 99 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #6 spot among the most played free games like Kerbal Space Program.
8.4
789
99
10
players
7. MachineCraft
Similarity 42% The main purpose of this game is showing and watching machines made out of blocks. Some of the game-modes allow you to battle or race against other players. (testing phase) You can create your original machine with ease by reassembling those machines that are distributed, or by using the automatic control block. MachineCraft is a free to play, building and sandbox game developed and published by G2CREW. Released on March 25th 2016 has received 889 reviews of which 686 were positive and 203 were negative resulting in a rating of 7.4 out of 10. The game currently holds the #7 spot among the most played free games like Kerbal Space Program.
7.4
686
203
6
players
8. Electrician Simulator - First Shock
Similarity 40% Learn the ropes from your Dad to become an electrician. Repair and assemble sockets, panels, strips, plugs, chandeliers and even change light bulbs. Oh... and don't mix up the wires! Results might be shocking. Electrician Simulator - First Shock is a simulation, education and singleplayer game developed by Take IT Studio! and published by Gaming Factory and Ultimate Games S.A.. Released on January 06th 2022 has received 1,860 reviews of which 1,502 were positive and 358 were negative resulting in a rating of 7.8 out of 10. The game currently holds the #8 spot among the most played free games like Kerbal Space Program.
7.8
1,502
358
3
players
9. Occupy White Walls
Similarity 46% A game about building art galleries may sound boring until you realise that just about anything can be an art gallery... Add in cutting edge AI, extremely creative community, Unreal graphics, and did we mention it's free? Occupy White Walls is a building, sandbox and simulation game developed and published by KULTURA Ex Machina. Released on July 08th 2022 has received 1,275 reviews of which 1,180 were positive and 95 were negative resulting in a rating of 8.8 out of 10. The game currently holds the #9 spot among the most played free games like Kerbal Space Program.
8.8
1,180
95
2
players
10. Kill It With Fire: HEATWAVE
Similarity 41% Kill It With Fire: Heatwave is a free chapter of a first-person action game about hunting spiders and causing collateral damage. The full game is OUT NOW! Kill It With Fire: HEATWAVE is a sandbox, simulation and funny game developed by Casey Donnellan Games LLC and published by tinyBuild. Released on July 17th 2020 has received 2,170 reviews of which 1,990 were positive and 180 were negative resulting in a rating of 8.8 out of 10. The game currently holds the #10 spot among the most played free games like Kerbal Space Program.
8.8
1,990
180
2
players