Games like Ostranauts on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Ostranauts are available at the bottom of the page.
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Wayward Terran Frontier: Zero Falls
2d space combat like no other. From the perspective of a single crew member, explore the fully destructible interior of any ship in a massive living world. Engage in space combat with no hitpoints where you know your enemy is dead when you see them fall out of their ship into the cold dark of space.
Occupy Mars: The Game
Survive and colonize Mars in a highly technical, open-world sandbox game. Build and upgrade your base, discover new regions, conduct mining operations, retrieve water, generate oxygen, grow crops, and fix broken parts.
Soulash 2
Soulash 2 is a sandbox RPG roguelike with a procedurally generated open world, simulated history, skill-based progression system, customizable abilities, material-based crafting, building, trading, and the possibility of total mayhem. Will you save your world or destroy it?
Junkyard Simulator
Did you ever wish to work in a junkyard? Now you can, with Junkyard Simulator. They are many roads leading to success - whichever you take depends on your decisions.
Saleblazers
Fight. Sell. Survive. Live off the land, build your perfect shop, and defend against nightly horrors in this open world survival shop simulator for 1-8 players.
House of Legacy
Step into the shoes of a fallen clan leader, starting with nothing but a crumbling estate and a handful of hopes, rising through careful planning, trade, and diplomacy to become one of the most powerful families in the land. Now it’s time to forge a legendary dynasty that leaves its mark on history.
VoidExpanse
Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse!
Reentry - A Space Flight Simulator
Do you have what it takes to be an astronaut? Reentry is a realistic space flight simulator based on NASAs space programs; from the first American human spaceflight in Project Mercury, the rendezvous and EVAs of Project Gemini to the Moon landing in Project Apollo.
Xsyon - Prelude
Xsyon is a player driven apocalyptic fantasy sandbox MMORPG, set in a living and evolving environment. Players create the world they want to live in as they form tribes, construct towns, shape landscapes, create quests, hunt, farm, gather, build societies and develop a New World.
ZED ZONE
A great catastrophe has come, and you, who are on duty, crash and trapped in a Zed Zone. There are zombies and monsters everywhere, In order to escape, by collecting materials, upgrading skills, building shelters, defeating zombie waves and mysterious mechs, chasing a glimmer of hope.
The Last Plague: Blight
The Last Plague: Blight is an authentic survival experience rooted in realism and immersion. Endure the hazards of a brutal open world and uncover the origins of a mysterious disease. You are humanity’s final hope in ending the Blight
EmergeNYC
EmergeNYC is a simulation of New York City's Emergency Services. Drive over 30 different Emergency Vehicles with up to 32 of your friends through busy City Streets with blazing sirens and air horns. Take the role of a firefighter, medic, or police officer and ride with your friends to emergencies
Sailwind
Sailing simulator featuring realistic sailing physics and a vast open world to explore. Embark on cargo delivery missions, customize your boat, try fishing and cooking. A relaxing day sail, or an epic ocean voyage? Your sailing adventure starts here!
Spirit Realm
English version not ready
Card Survival: Fantasy Forest
Card Survival: Fantasy Forest is a card-based deep survival simulator and the next installment in the Card Survival Series. Carve yourself a home in a primordial forest that has a will of its own. A day-to-day life simulator in a world where nature reigns with mystery, beauty and sometimes cruelty.
Railroader
You and your fellow railroaders are the lifeblood of your railroad, just like it is the lifeblood of the communities it serves. Switch cars at industries. Keep people moving while running local passenger trains. Run trains with a purpose in transition era Appalachia – in Railroader!
Cine Tracer
Cine Tracer is a realistic cinematography simulator. The player operates real world based cameras, sets up lights, and directs talent/actors in stunning next gen environments created in Unreal Engine 4.
Haven & Hearth
A free-to-play MMORPG with crafting, building, landscaping, foraging, hunting, fishing, a dash of poetry, and open PvP combat,
Starpoint Gemini 2
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.
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.
SpaceEngine
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.
Total Miner
Total Miner is an open world voxel sandbox game. It is primarily designed for creative RPG game builders, but also has two action/adventure style game modes where you can just jump in and play.
Most played games like Ostranauts on Steam
Take a look at the top games like Ostranauts that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.
1. Cyberpunk 2077
Similarity 40% Cyberpunk 2077 is an open-world, action-adventure RPG set in the dark future of Night City — a dangerous megalopolis obsessed with power, glamor, and ceaseless body modification. Cyberpunk 2077 is a cyberpunk and open world game developed and published by CD PROJEKT RED. Released on December 09th 2020 has received 844,921 reviews of which 713,071 were positive and 131,850 were negative resulting in a rating of 8.4 out of 10. The game has hit the top spot as the #1 most played game like Ostranauts, thanks to its 26,460 peak concurrent players over the last day.
8.4
713,071
131,850
26,460
players
2. No Man's Sky
Similarity 43% No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe. No Man's Sky is a open world, open world survival craft and space game developed and published by Hello Games. Released on August 12th 2016 has received 352,858 reviews of which 293,332 were positive and 59,526 were negative resulting in a rating of 8.2 out of 10. While seeing 13,602 players online at once in the last 24 hours, this game is currently ranked #2 among games like Ostranauts based on player count.
8.2
293,332
59,526
13,602
players
3. Space Engineers
Similarity 40% 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. While seeing 5,146 players online at once in the last 24 hours, this game is currently ranked #3 among games like Ostranauts based on player count.
8.8
117,204
15,143
5,146
players
4. Soulmask
Similarity 40% Escaping a deadly sacrificial ritual, you find an ancient mystical mask on your journey. This mask holds potent knowledge, changing the world you knew. Face the harsh challenges of nature, survive, rally followers, and build your own tribe. Explore and unveil the truths behind the enigmatic mask. Soulmask is a early access, survival and open world survival craft game developed by CampFire Studio and published by Qooland Games. Released on May 30th 2024 has received 14,866 reviews of which 11,979 were positive and 2,887 were negative resulting in a rating of 7.9 out of 10. With 3,768 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Ostranauts.
7.9
11,979
2,887
3,768
players
5. Empyrion - Galactic Survival
Similarity 41% 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! Empyrion - Galactic Survival is a simulation, co-op and open world survival craft game developed and published by Eleon Game Studios. Released on August 05th 2020 has received 33,247 reviews of which 26,195 were positive and 7,052 were negative resulting in a rating of 7.8 out of 10. With 1,102 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Ostranauts.
7.8
26,195
7,052
1,102
players
6. Motor Town: Behind The Wheel
Similarity 43% Enjoy realistic driving in the open world. Relaxing cargo deliveries or driving buses and taxis will give you enough money to buy new cars and parts. You can test your driving skills at the race track. It's all about pure driving pleasure! Motor Town: Behind The Wheel is a early access, open world and driving game developed and published by P3 Games. Released on December 17th 2021 has received 6,277 reviews of which 5,915 were positive and 362 were negative resulting in an impressive rating of 9.1 out of 10. With 1,014 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Ostranauts.
9.1
5,915
362
1,014
players
7. Necesse
Similarity 43% Build, quest, and conquer across an infinite procedurally generated world. Play alone or with friends as you establish a settlement and explore deep dungeons, fight monsters and bosses, mine rare ores, craft magical equipment, recruit specialists for your colony, and more! Necesse is a open world survival craft, multiplayer and open world game developed and published by Fair Games ApS. Released on December 12th 2019 has received 17,071 reviews of which 15,988 were positive and 1,083 were negative resulting in an impressive rating of 9.1 out of 10. With 810 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Ostranauts.
9.1
15,988
1,083
810
players
8. Eco
Similarity 52% Build a civilization of real people, working together to advance society and stop a meteor, all without destroying the ecosystem in the process. Eco is a early access, simulation and building game developed and published by Strange Loop Games. Released on February 06th 2018 has received 13,212 reviews of which 10,744 were positive and 2,468 were negative resulting in a rating of 8.0 out of 10. With 749 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Ostranauts.
8.0
10,744
2,468
749
players
9. House of Legacy
Similarity 50% Step into the shoes of a fallen clan leader, starting with nothing but a crumbling estate and a handful of hopes, rising through careful planning, trade, and diplomacy to become one of the most powerful families in the land. Now it’s time to forge a legendary dynasty that leaves its mark on history. House of Legacy is a early access, sandbox and management game developed by S3 Studio and published by Thermite Games. Released on May 14th 2025 has received 1,359 reviews of which 1,094 were positive and 265 were negative resulting in a rating of 7.7 out of 10. With 552 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Ostranauts.
7.7
1,094
265
552
players
10. Railroader
Similarity 47% You and your fellow railroaders are the lifeblood of your railroad, just like it is the lifeblood of the communities it serves. Switch cars at industries. Keep people moving while running local passenger trains. Run trains with a purpose in transition era Appalachia – in Railroader! Railroader is a early access, simulation and trains game developed and published by Giraffe Lab LLC. Released on December 07th 2023 has received 2,699 reviews of which 2,628 were positive and 71 were negative resulting in an impressive rating of 9.3 out of 10. With 504 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Ostranauts.
9.3
2,628
71
504
players
Best deals on games like Ostranauts on Steam
Discover fantastic savings with the best discounts on a variety of games like Ostranauts 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 Ostranauts.
1. Starpoint Gemini 2
Similarity 45% 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. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Ostranauts.
6.8
2,843
1,250
-99%
31.99€
0.58€
2. VoidExpanse
Similarity 50% Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse! VoidExpanse is a space, rpg and open world game developed and published by AtomicTorch Studio. Released on April 02nd 2015 has received 748 reviews of which 533 were positive and 215 were negative resulting in a rating of 6.8 out of 10. Thanks to its incredible 94% discount, this game is now the #2 best deal in games like Ostranauts.
6.8
533
215
-94%
14.79€
1.00€
3. VoidExpanse
Similarity 50% Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse! VoidExpanse is a game developed and published by . Released on April 02nd 2015 has received 748 reviews of which 533 were positive and 215 were negative resulting in a rating of 6.8 out of 10. Thanks to its incredible 94% discount, this game is now the #3 best deal in games like Ostranauts.
6.8
533
215
-94%
14.79€
1.00€
4. Starpoint Gemini 2
Similarity 45% 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 game developed and published by . 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 #4 position in the best deals for games like Ostranauts.
6.8
2,843
1,250
-99%
31.99€
0.58€
5. No Man's Sky
Similarity 43% No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe. No Man's Sky is a open world, open world survival craft and space game developed and published by Hello Games. Released on August 12th 2016 has received 352,858 reviews of which 293,332 were positive and 59,526 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 78% discount, this title has earned the #5 position in the best deals for games like Ostranauts.
8.2
293,332
59,526
-78%
58.99€
13.24€
6. Quasimorph
Similarity 42% Take on a role of a hardened PMC fighter in a dark turn-based extraction RPG. Engage in unforgiving combat, manage your ship and pile up the bodies of your clones to unravel the dark mystery behind threat to all life. Quasimorph is a early access, extraction shooter and simulation game developed by Magnum Scriptum and published by HypeTrain Digital. Released on October 02nd 2023 has received 4,304 reviews of which 3,544 were positive and 760 were negative resulting in a rating of 8.0 out of 10. Currently offered at a significant 76% discount, this title has earned the #6 position in the best deals for games like Ostranauts.
8.0
3,544
760
-76%
19.99€
4.84€
7. Occupy Mars: The Game
Similarity 58% Survive and colonize Mars in a highly technical, open-world sandbox game. Build and upgrade your base, discover new regions, conduct mining operations, retrieve water, generate oxygen, grow crops, and fix broken parts. Occupy Mars: The Game is a early access, open world survival craft and open world game developed and published by ▲ Pyramid Games. Released on May 10th 2023 has received 2,431 reviews of which 1,792 were positive and 639 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 76% discount, this title has earned the #7 position in the best deals for games like Ostranauts.
7.1
1,792
639
-76%
24.50€
5.92€
8. No Man's Sky
Similarity 43% No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe. No Man's Sky is a game developed and published by . Released on August 12th 2016 has received 352,858 reviews of which 293,332 were positive and 59,526 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 78% discount, this title has earned the #8 position in the best deals for games like Ostranauts.
8.2
293,332
59,526
-78%
58.99€
13.24€
9. Frozen Flame
Similarity 42% A challenging exploration and survival adventure, set in the dying world of Dragons. Only those who harness the power of Frozen Flame have the means to survive the harsh conditions of the realm and able to muster the strength to cleanse it for good. Frozen Flame is a early access, open world survival craft and online co-op game developed by Dreamside Interactive and published by Ravenage Games and 2P Games. Released on November 17th 2022 has received 2,885 reviews of which 1,889 were positive and 996 were negative resulting in a rating of 6.4 out of 10. Currently offered at a significant 71% discount, this title has earned the #9 position in the best deals for games like Ostranauts.
6.4
1,889
996
-71%
19.50€
5.72€
10. Quasimorph
Similarity 42% Take on a role of a hardened PMC fighter in a dark turn-based extraction RPG. Engage in unforgiving combat, manage your ship and pile up the bodies of your clones to unravel the dark mystery behind threat to all life. Quasimorph is a game developed and published by . Released on October 02nd 2023 has received 4,304 reviews of which 3,544 were positive and 760 were negative resulting in a rating of 8.0 out of 10. Currently offered at a significant 76% discount, this title has earned the #10 position in the best deals for games like Ostranauts.
8.0
3,544
760
-76%
19.99€
4.84€
Free games like Ostranauts on Steam
Check out this fantastic list of free-to-play games like Ostranauts 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 Ostranauts.
1. Haven & Hearth
Similarity 45% A free-to-play MMORPG with crafting, building, landscaping, foraging, hunting, fishing, a dash of poetry, and open PvP combat, Haven & Hearth is a early access, mmorpg and rpg game developed and published by Seatribe. Released on November 01st 2024 has received 789 reviews of which 597 were positive and 192 were negative resulting in a rating of 7.2 out of 10. The game currently holds the #1 spot among the most played free games like Ostranauts.
7.2
597
192
61
players