- #1 HELLO EXO
97% matchNo user reviews
Dev: Weasel Games
Windows
It is the year 2072. Recent research has revealed how to locate an Earth-like exoplanet. You were shipped there. Your mission is to repair the spaceship, keep people in hibernation pods alive, and prepare the exoplanet for their arrival.
Why similar: Space Sim 32.4%, Colony Sim 32.3%, Strategy 19.4%, Space 8.3%, Base Building 6.5%
- #2 Starnova Aerospace
96% matchNo user reviews2025
Dev: DogGottenGame
Windows
As the CEO of a spaceship design company, arrange blocks with different modes and functions to build powerful ships. Use resources from battles to upgrade blocks and acquire new ones through supplies. Strategically enhance your ship to maximize performance and defeat competitors.
Why similar: Space Sim 31.9%, Simulation 20.3%, Strategy 17.7%, Wargame 17.3%, Space 5.6%
- #3 Space Elevator Project
96% matchNo user reviews
Dev: VanilliA Studio
Windows
A simulation sci-fi game where players take on the role of the project manager of a space elevator project. They will progressively achieve project phase goals and ultimately accomplish the ultimate goal of constructing a Mars colonization spacecraft.
Why similar: Space Sim 37.6%, Simulation 23.4%, Strategy 20.2%, Space 7.2%, Base Building 5.8%
- #4 Nova Origin
95% matchNo user reviews2026
Dev: ZapNova Games
Windows
Nova Origin is a next-generation sci-fi city builder set on a mysterious alien planet. Build, expand, and survive as you establish a thriving colony, manage resources, and uncover the secrets of a hostile new world.
Why similar: Colony Sim 30.1%, Space Sim 28.6%, Strategy 17.6%, Simulation 17%, Space 3%
- #5 Arcbound
94% matchNo user reviews2026
Dev: Outbreak Interactive
Windows
A colony sim set on a starship. Build and manage a spacefaring civilisation, balance oxygen, power, and crew survival, and guide your ship through the final escape from Earth.
Why similar: Colony Sim 35.7%, Space Sim 31.9%, Simulation 13.4%, Base Building 10.1%, Strategy 7.1%
- #6 Super Space Frogs
94% matchNo user reviews
Dev: Fatfrogg
Windows
Super Space Frogs is a 2D physics-based rocket game. Design, Deploy, and Fly awesome rockets. Unlock new technology to build bigger and better ships. Explore the solar system and unlocks the mysteries it holds.
Why similar: Space Sim 32.6%, Colony Sim 25.1%, Wargame 17.4%, Simulation 11.4%, Exploration 4.9%
- #7 Planet Miner
93% matchVery Positive80% of 61 reviews2021
Dev: Cherniukh Andrii
Windows
Remove fog, look for and mine minerals, construct buildings, upgrade the rover and reach the portal.
Why similar: Space Sim 36.8%, Colony Sim 29.1%, Simulation 20.1%, Space 4.6%, Exploration 4.3%
- #8 Orbit One
92% matchNo user reviews2026
Dev: Specific Impulse Interactive
Windows
Take to the stars and explore the solar system. Master the orbital mechanics of N-body physics. Plot a careful course to complete your mission.
Why similar: Space Sim 43.5%, Simulation 25.8%, Strategy 18.8%, Space 10.2%, Indie 1.1%
- #9 Space Commander
91% matchNo user reviews
Dev: Gambit Games StudioPub: TBA
Windows
The endless expanse of space has never been such a dangerous place. Take command as a Space Fleet Admiral who will face the challenge of galactic war and determine the fate of the universe.
Why similar: Space Sim 38.5%, Strategy 20.7%, Simulation 19%, Wargame 17.6%, Space 3.7%
- #10 Helium Rain
91% matchMostly Positive79% of 332 reviews2018
Dev: Deimos Games
Windows · Linux
Median: 3.3 hrsMean: 8.6 hrs≥1hr: 73%
Trade your wares and eliminate the competition in a cutthroat world. Buy new ships and stations to mine and haul resources. Explore the vast emptiness of space.
Why similar: Space Sim 48.9%, Simulation 17.2%, Strategy 14.1%, Space 13.2%, Exploration 4.7%
- #11 Red Frontier
90% matchNo user reviews
Dev: DW
Windows
Red Frontier is a game about exploring the red planet and collecting trash and scrap metal.
Why similar: Colony Sim 30.4%, Space Sim 26.7%, Simulation 18.1%, Strategy 16.5%, Exploration 3.7%
- #12 Tidal Expanse
89% matchNo user reviews
Dev: Per Aspera Studios
Windows
Dive into a hardcore space station simulation and overcome the unforgiving environment of space. You must build and manage your station under the pressures of life, economics, and thermodynamics. Rise to power through economic leverage or ruthless military might.
Why similar: Space Sim 35.4%, Colony Sim 28.7%, Simulation 16.7%, Strategy 11.2%, Space 3.7%
- #13 Insect Wars
89% matchNo user reviews
Dev: MauricePub: The Chair Studios
Windows
Insect Wars is a real-time strategy game where you lead an army of insects. Collect resources, build your colony, and destroy the enemy's to win. Scout the enemy, master different unit types and technologies, and face off in 1v1 or team-up against the AI.
Why similar: Colony Sim 39.6%, Wargame 27.6%, Strategy 24.6%, Simulation 8.2%
- #14 Starfall Protocol
88% matchNo user reviews
Dev: Chaos Systematic
Windows
Starfall Protocol is a Starship colony sim with RPG adventures in a galaxy with millions of explorable planets!🌌
Why similar: Space Sim 31.6%, Colony Sim 30.4%, Simulation 12.4%, Strategy 9.4%, Base Building 9.1%
- #15 Star Fleet Deluxe
86% match5 user reviews100% of 5 reviews2026
Dev: Trevor SorensenPub: Interstel Technologies, Inc.
Windows
Command a UGA heavy cruiser against the Krellan Empire. Navigate space, manage resources, and coordinate defense strategies. Use starbases and outposts to protect colonies while engaging in tactical ship combat. Your decisions will determine the fate of sectors in this military space simulation.
Why similar: Space Sim 43%, Wargame 25.1%, Strategy 21.3%, Simulation 9.3%, Singleplayer 1.4%
- #16 Titan: The Ascension
87% matchNo user reviews2027
Dev: Wildercroft Studio
Windows
Titan: The Ascension is a colony management strategy game on Saturn’s moon Titan. Build and expand an off-world industrial colony, extract ice to produce water for Earth, trade resources, and defend against ancient automated systems that react to technology growth. Will you prevail?
Why similar: Colony Sim 26.3%, Space Sim 24.3%, Strategy 12.4%, Simulation 12.3%, Space 9.4%
- #17 Stationbreak
86% matchNo user reviews
Dev: Broken Spaceship
Windows · Linux
A grounded sci-fi station builder where you hold failing systems together while pursued by a relentless, energy-hungry swarm. As a fleet on the run, drop into hostile systems, gather what you can, and jump away before you are overwhelmed. Try to survive long enough to secure a future for humanity.
Why similar: Space Sim 32.7%, Colony Sim 22.6%, Simulation 12.3%, Strategy 12.1%, Base Building 11.2%
- #18 Rogue System
85% matchMixed67% of 274 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 60.7%, Simulation 30%, Space 9.3%
- #19 The Colony
84% matchMostly Negative32% of 22 reviews2018
Dev: Rusty Swain
Windows
The Colony is a city building game where the player must manage their resources in order for the population to survive and thrive. Constructing buildings and assigning jobs to villagers, you can gather resources like wood, food, stone, tin, and copper and use them to grow your village.
Why similar: Colony Sim 61.4%, Simulation 19.8%, Strategy 18.8%
- #20 Theater Commander: The Coming Wars, Modern War Game
84% match5 user reviews17% of 6 reviews2019
Dev: Sand Table Software
Windows
A real-time modern warfare simulation game on campaign and battle level, Theater Commander features more than a dozen scenarios covering hypothetical conflicts around the globe involving current air, naval and land force from 17 countries.
Why similar: Wargame 35.1%, Simulation 34%, Strategy 30.9%
- #21 Astrostrike
83% matchNo user reviews2027
Dev: Space GamesPub: Ralon Software
Windows
You are the captain of the Galactic battleship, building hundreds of gun turrets, raising dozens of space fighters, establishing aircraft carrier groups, space stations, and conquering the entire Milky Way
Why similar: Space Sim 38.6%, Wargame 23.8%, Simulation 12.8%, Strategy 10.7%, Base Building 8%
- #22 Tachyon: The Fringe
82% matchVery Positive89% of 245 reviews2009
Dev: NovaLogic
Windows
Median: 24 minMean: 4.5 hrs≥1hr: 36%
Caught in the middle of a violent conflict on the fringe of the galaxy — your ability to survive will depend on your piloting skills and combat savvy as a mercenary space fighter. But, as you explore the vastly detailed world of Tachyon: The Fringe, you will often find that the most powerful weapon on your ship is in your head.
Why similar: Space Sim 53.8%, Simulation 33.4%, Space 12.8%
- #23 Starship Colony
82% matchNo user reviews2026
Dev: Black Belt Software
Windows
A deep starship colony sim. Build your starship, manage air, water, food, fuel, energy, temperature and psychology to keep your crew alive across vast distances. Closed-loop system in space. Mining, wiring, plumbing, in-ship factory, (alien?) radio signals & translation, diplomacy, combat, and more.
Why similar: Colony Sim 31.9%, Space Sim 25.1%, Simulation 10.8%, Strategy 10.5%, Base Building 9.8%
- #24 Deep Space Remnant
81% matchNo user reviews2026
Dev: Atlas
Windows
Deep Space Remnant is a space survival base-building simulator: build your station, gather resources with ships, research technology, and strengthen shields to survive escalating cosmic radiation.
Why similar: Space Sim 37.8%, Strategy 23.6%, Simulation 22.5%, Space 7.8%, Base Building 7.6%
- #25 Gravitation
81% matchNo user reviews
Dev: GoldenEggs Workshop
Windows
Gravitation is a sandbox simulation set in the vastness of the cosmos and built on the laws of real-world physics.
Why similar: Space Sim 39.7%, Simulation 24.1%, Strategy 21.8%, Space 6.4%, Exploration 4.3%
- #26 Deep Field
79% matchNo user reviews
Dev: spicyPub: Deep Field Development
Windows · Mac
Build spacecraft with a realistic part-based editor and fight multiplayer orbital wars using Keplerian, Newtonian, and patched-conics flight. Engage with lasers, railguns, missiles, and EW in fast, decisive battles shaped by strategy and logistics.
Why similar: Space Sim 43.2%, Simulation 18%, Wargame 17.3%, Strategy 12.9%, Space 8.6%
- #27 Falling Stars: War of Empires
80% matchMixed69% of 16 reviews2016
Dev: Riveted GamesPub: Lock 'n Load Publishing
Windows
Falling Stars: War of Empires is a fast-paced digital tabletop strategy game where each decision you make forces the game to evolve differently every time you play. Command hundreds of ships in battle, resolve intricate political agendas, and discover the deep interplanetary relations of the galaxy!
Why similar: Space Sim 26.3%, Simulation 26.2%, Strategy 25.7%, Wargame 18.4%, Indie 3.4%
- #28 Irongrim Tower
79% matchNo user reviews
Dev: Promeduz
Windows
Tower defense meets city building in a grimdark sci-fi world. Build vertically, manage resources, defend against alien hordes, and command machine priests in humanity's last stronghold.
Why similar: Space Sim 31%, Colony Sim 30.5%, Strategy 17.7%, Simulation 15%, Space 3.2%
- #29 SCP: Site Director
78% matchNo user reviews
Dev: Noble Gas Studios
Windows
An SCP Facility Management game with strong visual stylings that allows you to run your own SCP Foundation Sites, capture anomalies, hire staff to contain and research them, and recontain them when they escape. Orchestrate multiple sites and guide your clandestine organization to success!
Why similar: Colony Sim 41.1%, Simulation 28.7%, Strategy 24.8%, 2D 3.5%, Indie 1.2%
- #30 Cosmic colonists
78% matchNo user reviews
Dev: Chewy bytes studio
Windows
Build a colony on an alien planet. Supply settlers, defend against meteors, upgrade your base, develop your economy, and fight for survival.
Why similar: Space Sim 35.6%, Simulation 22.8%, Strategy 19.9%, Colony Sim 10.1%, Space 5.6%
- #31 Exodus: The Colonization of Space
76% matchPositive100% of 22 reviews2025
Dev: Artex
Windows · Linux
Colonize a galaxy in 256 colors! In this RiscOS gem from 1997, the fate of human civilization lies in your hands. Travel the stars, claim uninhabited planets or fight over them against your alien opponents. Your ultimate chance to relive the original experience, on the PC for the first time ever.
Why similar: Space Sim 29.3%, Colony Sim 28.8%, Simulation 18.4%, Strategy 16.4%, Space 4.4%
- #32 Final Frontier Story
76% matchVery Positive83% of 58 reviews2026
Dev: Kairosoft Co.,Ltd
Windows
Dodge lasers and explore! Planetary Development Simulation
Why similar: Colony Sim 35.6%, Space Sim 33.4%, Simulation 21.8%, Strategy 6%, 2D 2%
- #33 Villaging
77% matchNo user reviews
Dev: Villager Studio
Windows
Villaging is a simple game of strategy where you reign on a kingdom and you need to manage your ressources and your inhabitant .But you will also get threat from other kingdom so you will need to make an army to fight against them .
Why similar: Colony Sim 42.9%, Strategy 25.8%, Wargame 25.3%, 2D 3.7%, Singleplayer 1.2%
- #34 Operation Numa
77% matchNo user reviews
Dev: Stonebyte Studio
Windows
Master the heavy physics of your offroad hauler and upgrade it to conquer the treacherous Martian landscape. Transport vital resources to evolve your central outpost from a humble shelter into a thriving planetary hub. The frontier is hostile, it’s your job to tame it.
Why similar: Colony Sim 32.4%, Space Sim 32.4%, Simulation 20.9%, Space 4.9%, Exploration 4.2%
- #35 _space_train
75% matchNo user reviews
Dev: Josh McNamee
Windows
What if there was a train, in space? Embark as a simple passenger or take a longer-term role as a member of staff in an asymmetric gaming experience like no other.
Why similar: Space Sim 36.3%, Colony Sim 32.6%, Simulation 13.1%, Space 7.7%, Base Building 5.3%
- #36 FSX SpacePort
75% matchNo user reviews
Dev: TerraBuilder
Windows
Spaceflight add-on for Microsoft Flight Simulator X
Why similar: Space Sim 44.1%, Simulation 41.5%, Space 14.3%
- #37 All My Gods
73% matchVery Positive88% of 112 reviews2015
Dev: Qumaron
Windows
Become a Roman god! Don't be shy! Epic game that topped the charts on Big Fish Games and GameHouse!
Why similar: Colony Sim 60.1%, Strategy 19.3%, Simulation 17.5%, Adventure 3.1%
- #38 Andromeda: Rebirth of Humanity
73% matchMixed65% of 116 reviews2021
Dev: Null Reference Games
Windows · Linux
Andromeda is a hybrid between a space 4X and an MMO for Android and PC. Get dropped into an online universe sandbox with 2 galaxies full of planets to colonize. Build structures like Mines to generate resources to build ships and engage in fleet battles with NPCs and other players.
Why similar: Space Sim 37.8%, Colony Sim 30.3%, Strategy 18.3%, Space 6.8%, Simulation 5.9%
- #39 The Sentient
74% matchMostly Negative39% of 82 reviews2016
Dev: Uncaged Studios
Windows
Play as an A.I tasked with helping mankind explore the vastness of space. Customize your ship, recruit a crew, battle alien vessels, research new technology and explore randomly generated universes.
Why similar: Space Sim 37.8%, Simulation 24.3%, Strategy 23.1%, Space 11.5%, Indie 3.3%
- #40 Station Nexus
72% matchNo user reviews2026
Dev: Rudovia Subject
Windows
During a 96,000 km journey, you must manage power, secure resources, and survive. But… you may not be alone out here. A top-down, system- and story-driven exploration game. It is based on the opening chapter of a future sequel. It aims to deliver a unique and experimental gameplay system.
Why similar: Space Sim 35.4%, Colony Sim 33.9%, Simulation 15.4%, Exploration 4.9%, Space 3.7%
- #41 X: Tension
73% matchMostly Positive78% of 138 reviews2010
Dev: Egosoft
Windows
Median: 6 minMean: 3.2 hrs≥1hr: 15%
X-Tension is the eagerly awaited expansion pack to X: Beyond the Frontier. The expansion is not limited by a linear plot line but makes use of new ways to expand your empire. You can now take part in missions that are offered to you throughout the game.
Why similar: Space Sim 38.4%, Simulation 28.1%, Strategy 18.4%, Space 14.1%, Singleplayer 0.9%
- #42 Space Zone
71% match3 user reviews33% of 3 reviews2024
Dev: Astroviz
Windows
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 50.7%, Simulation 30.5%, Space 10.7%, Exploration 7.3%, Singleplayer 0.8%
- #43 Age of Beasts
72% matchNo user reviews2026
Dev: LD Gaming
Windows
Colonial Wars is a sci-fi futuristic real-time strategy and survival game where you face up to three different opponents on battle maps, fighting for control of resources and territory while also contending with the local alien wildlife population.
Why similar: Colony Sim 43.4%, Simulation 30%, Strategy 25.9%, Singleplayer 0.7%
- #44 REAL MOON
70% matchMixed68% of 114 reviews2025
Dev: historia Inc.
Windows
Explore a precisely recreated lunar surface built from real data and a JAXA-backed simulation.
Why similar: Space Sim 50.4%, Simulation 27.4%, Space 11.7%, Exploration 7.6%, Adventure 2%
- #45 Amazing Space
71% match1 user reviews0% of 1 reviews2025
Dev: Playbosh Games Entertainment UG (haftungsbeschränkt)
Windows
Welcome to the world of space stations! Create your own space base with workplaces and production facilities. Ensure sustainability and safety, explore space, defend your base, and build diplomatic relationships. Be vigilant and successful!
Why similar: Space Sim 32.5%, Colony Sim 26.3%, Simulation 12.9%, Strategy 11.5%, Space 8.9%
- #46 Idle Starfleet
70% matchNo user reviews2026
Dev: Zampia inc
Windows
Create your own carrier fleet, explore the universe, and destroy enemy ships with style!
Why similar: Space Sim 30.2%, Simulation 20.6%, Strategy 18.7%, Wargame 18.6%, Space 5.9%
- #47 Kairobotica
69% matchPositive90% of 49 reviews2023
Dev: Kairosoft Co.,Ltd
Windows
Vanquish villains and lead the Kairobot Corps to glory in this spacefaring saga!
Why similar: Space Sim 31.8%, Colony Sim 31.3%, Simulation 14.8%, Strategy 11.6%, Space 6.2%
- #48 Space Simulator
71% matchMostly Negative36% of 162 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 42.9%, Simulation 39.1%, Space 17.9%
- #49 The Cosmogenesis Project: Corruption
70% matchNo user reviews
Dev: BitDriven
Windows
Pilot your ship across a procedurally generated star map as corruption spreads inward. Each sector holds a stabiliser; protect it from raiders and pump energy into its shields. Jump between nodes, prioritise threats, and manage energy. Hold the line until time runs out, or be consumed by corruption.
Why similar: Space Sim 49.2%, Strategy 23.7%, Space 15.8%, Simulation 10.7%, Singleplayer 0.7%
- #50 Planet Factory
68% matchPositive86% of 28 reviews2024
Dev: SupremeGuardianGames
Windows
A small quick game about building a factory to launch planets into a solar system! Grow your base and increase production to make the ultimate factory for launching planets!
Why similar: Space Sim 37.7%, Simulation 23.7%, Strategy 21.5%, Space 6.5%, Base Building 6.3%
- #51 Decisive Campaigns: Case Blue
69% matchVery Positive90% of 67 reviews2015
Dev: VR DesignsPub: Matrix Games
Windows
Decisive Campaigns: Case Blue simulates the German drive to Stalingrad and into the Caucasus of the summer of 1942, as well as its May preludes (2nd Kharkov offensive, Operation Trappenjagd) and also the Soviet winter counter-offensive (Operation Uranus) that ended with the encirclement of 6th Army in Stalingrad.
Why similar: Strategy 42.7%, Simulation 41.7%, Wargame 15.6%
- #52 ISS Simulator
67% matchMostly Positive79% of 94 reviews2024
Dev: Spacedata.incPub: 株式会社スペースデータ
Windows
The ultimate space simulator game, precisely modeling the space and space environment inside the International Space Station (ISS).
Why similar: Space Sim 37.8%, Colony Sim 34%, Simulation 22.3%, Space 5.4%, Singleplayer 0.4%
- #53 Interstellar Pilot 2
67% matchVery Positive91% of 155 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%, Simulation 24.8%, Strategy 22.1%, Space 8.7%, Adventure 1.6%
- #54 nStations
69% matchMixed57% of 14 reviews2019
Dev: OxeLiz
Windows · Mac
Construct and manage your colony anytime, anywhere, any device!!!!
Why similar: Space Sim 22.9%, Colony Sim 22.8%, Simulation 22.2%, Strategy 20.2%, Space 5%
- #55 VOID PROFIT
68% matchNo user reviews2026
Dev: Corvid Food
Windows
Fly a rented ship in a procedurally-generated universe, navigate risky routes, and profit from changing markets before the opportunity disappears and you lose it all. Take jobs, navigate the markets, smuggle, lie. Do everything in order to keep flying.
Why similar: Space Sim 50.6%, Simulation 27.3%, Strategy 10.4%, Space 6.3%, 2D 3.9%
- #56 FireAirPlan
68% match1 user reviews100% of 1 reviews2021
Dev: youshaonianstudio
Windows
Shoting!!!
Why similar: Space Sim 41.9%, Simulation 26.4%, Strategy 22.8%, Space 7.2%, Indie 1.1%
- #57 AstroCore Mining
67% matchNo user reviews
Dev: gamegine
Windows
AstroCore Mining puts you in charge of a colony where profit is everything and survival is fragile. Extract resources, balance factions, and face pirates and unrest. Lead not just a colony but the future of a nation in the brutal reality of space capitalism. Join to the Playtest now!
Why similar: Space Sim 33.1%, Colony Sim 32.6%, Strategy 9.1%, Simulation 7.4%, Space 6.3%
- #58 The Last Starship
65% matchMostly Positive75% of 1,491 reviews2026
Dev: Introversion Software
Windows · Mac
Median: 6.1 hrsMean: 11.2 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 29.7%, Colony Sim 23.6%, Simulation 10.8%, Strategy 10.6%, Base Building 8.9%
- #59 The Final Earth 2
65% matchVery Positive97% of 399 reviews2022
Dev: Florian van Strien
Windows
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony. Gather resources, then build and research your way to a better future! Grow your city from an exploration ship to a huge metropolis, full of advanced technology. What will you build?
Why similar: Colony Sim 32.4%, Space Sim 26.7%, Strategy 11.2%, Simulation 9.3%, Space 8.9%