Poly Universe
Poly Universe is a survival city-building game in a galaxy where planets are only slightly larger than the colonists who inhabit them.
85% of 104 Steam reviews are positive$9.99
Games like Flat Worlds
If Flat Worlds scratched a relaxing and replayable itch for you, keep reading. Browse these games for your next favorite.
Solar Expanse - Space Exploration Manager
Run a 21st century space company: plan real orbital transfers, sling rockets past planets, mine the asteroid belt and drop water ice onto Mars. A slow, numbers-first logistics sim where a good plan pays off centuries later, and terraforming a whole planet is just the next item on the list.
Relaxing, Replayable
87% of 1,343 Steam reviews are positivePlayers online now: 86$17.99Solargene
Run a private space corporation across a realistically simulated solar system. Build colonies from Mercury to the Kuiper Belt, keep picky astronauts alive, untangle production chains and logistics, and turn contracts with Earth's spacefaring nations into your own off-world empire. Deep, demanding and replayable.
Replayable
77% of 784 Steam reviews are positivePlayers online now: 18$34.99Poly Universe
Poly Universe is a survival city-building game in a galaxy where planets are only slightly larger than the colonists who inhabit them.
Replayable
85% of 104 Steam reviews are positive$9.99Farlight Explorers
Extract and gather resources from different planets. Manage the supply of electricity, water, food and oxygen of your base in order to survive. Automate the creation of new products. Build a spaceship to transport your products to other places...
Relaxing, Replayable
53% of 189 Steam reviews are positive$9.99Earth Space Colonies
Earth Space Colonies is a strategy-simulation game where you build space colonies around the Solar system. Establish a first self-sustaining colony on the Red planet with ultimate goal of terraforming Mars. Play three story campaigns all at once: terraform Mars, fight on Ceres and explore Ganymede.
Relaxing, Replayable
38% of 121 Steam reviews are positive$9.99Astro Colony
Astro Colony is a relaxed automation game in an endless procedurally generated universe. Build conveyor networks, move and dock your stations, recruit astronauts and research new tech, alone or with friends. No timers, no punishing failure: just you, a growing colony and a galaxy of voxel planets to strip for parts.
Relaxing, Replayable
80% of 2,440 Steam reviews are positivePlayers online now: 106$19.99SpaceCraft
SpaceCraft is an online galaxy where you mine planets, build your own ships from parts, automate bases and trade with other players. Fly out, scan a system, land, dig something up and turn it into a business. A calm, open-ended space sandbox that rewards patience and works best with friends.
63% of 2,730 Steam reviews are positivePlayers online now: 232$29.99Moons of Ardan
Embark on a space city-building adventure in Moons of Ardan! Develop a thriving civilization in a real-time planetary system. Oversee production chains, cater to the needs of your axonauts, recover their lost technologies, and navigate resource transportation.
Relaxing, Replayable
93% of 76 Steam reviews are positive$19.99Interstellar Transport Company
Build a galactic transportation empire and supply humanity with everything it needs to colonize the stars. In this sci-fi logistics simulator, grow your company from a local transport agency into an interstellar logistics behemoth! Singleplayer, vs AI, and online multiplayer.
Replayable
65% of 397 Steam reviews are positive$24.99Stellar Settlers: Space Base Builder
Stellar Settlers is a chill space base/city builder and colony sim game. With unique vertical and horizontal base-building gameplay, settle on 10 hostile alien planets and build your own thriving colony. Get enough materials to build a physics-based Spaceship and try to escape from disasters.
Relaxing, Replayable
69% of 748 Steam reviews are positivePlayers online now: 1$11.99Planet S
Planet S is a real-time strategy game about colonizing a whole solar system. Claim procedurally generated planets with a spaceport, build cities, feed production chains and grow your faction into a scientific or military power. Play solo or with up to seven friends, in peace or open war.
Replayable
91% of 2,908 Steam reviews are positivePlayers online now: 5FreeAlien Horizon (Preview Alpha)
A sci-fi survival city builder set on an inhospitable alien planet. Faced with imminent destruction of Earth, humanity pooled together their resources and sent sleeper ships to nearby potentially habitable planets. But this one turned out to be much less habitable than expected....
Replayable
87% of 209 Steam reviews are positivePlayers online now: 2Free
Cheaper than Flat Worlds
Farlight Explorers
Extract and gather resources from different planets. Manage the supply of electricity, water, food and oxygen of your base in order to survive.
53% of 189 Steam reviews are positive$9.99
Earth Space Colonies
Earth Space Colonies is a strategy-simulation game where you build space colonies around the Solar system.
38% of 121 Steam reviews are positive$9.99
Stellar Settlers: Space Base Builder
Stellar Settlers is a chill space base/city builder and colony sim game.
69% of 748 Steam reviews are positivePlayers online now: 1$11.99
Plan B: Terraform
Turn frozen wasteland into green, living terrain by moving water, resources and people across a calm hex-grid planet.
91% of 3,648 Steam reviews are positivePlayers online now: 169$11.99
Sector Space
Explore a procedurally generated galaxy, mine asteroids, refine minerals, colonize planets, build stations, deploy drones, salvage rare items…
94% of 153 Steam reviews are positivePlayers online now: 2$7.49
My Colony
Build a space colony from a single rover, grow it into a sprawling economy, and rule it your way.
89% of 276 Steam reviews are positivePlayers online now: 10$4.99
A Planet of Mine Legacy
A Planet of Mine is a mini procedural 4X. Starting from a single and unique planet, survive, gather and combine resources, develop your technologies…
60% of 58 Steam reviews are positive$6.99
Cargo Company
Cargo Company is a transport simulation tycoon game where you make money by transporting passengers, wood, steel, goods, cars, tanks and more…
57% of 68 Steam reviews are positive$9.99
Space Architect
Mine asteroids, build production lines, keep your crew fed and trade with passing ships to buy back your freedom.
72% of 306 Steam reviews are positivePlayers online now: 24$1.79
The Final Earth 2
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony.
97% of 421 Steam reviews are positivePlayers online now: 8$9.99
Unclaimed World
Manage interstellar pioneers and their descendants in this detailed sci-fi colony sim.
49% of 179 Steam reviews are positive$1.18
Hidden gems like Flat Worlds
Solar Expanse - Space Exploration Manager
Run a space company at your own pace, moving cargo across the solar system one careful calculation at a time.
87% of 1,343 Steam reviews are positivePlayers online now: 86$17.99
Sector Space
Explore a procedurally generated galaxy, mine asteroids, refine minerals, colonize planets, build stations, deploy drones, salvage rare items…
94% of 153 Steam reviews are positivePlayers online now: 2$7.49
Outworld Station
Link modules with tubes, run supply chains across planets and build starships at your own pace, alone or with friends.
83% of 863 Steam reviews are positivePlayers online now: 31$18.99
Plan B: Terraform
Turn frozen wasteland into green, living terrain by moving water, resources and people across a calm hex-grid planet.
91% of 3,648 Steam reviews are positivePlayers online now: 169$11.99
Astro Colony
Set up conveyor networks, dock your stations and research new tech at your own pace, alone or with friends.
80% of 2,440 Steam reviews are positivePlayers online now: 106$19.99
Solar Nations 2
Steer a 2092 superpower through nine worlds, fleet building and deep politics, solo or with friends, where a war can end in nuclear fire.
85% of 662 Steam reviews are positivePlayers online now: 36$14.99
Solargene
Run a private space corporation across a realistically simulated solar system.
77% of 784 Steam reviews are positivePlayers online now: 18$34.99
The Last Starship
Design a working starship from the reactor up, then take it into a fresh galaxy each run as a miner, pirate hunter or anything else you fancy.
75% of 1,644 Steam reviews are positivePlayers online now: 96$19.99
Planet S
Claim procedurally generated planets, raise cities from a single spaceport, and grow your faction into a scientific or military power, alone or…
91% of 2,908 Steam reviews are positivePlayers online now: 5Free
The Final Earth 2
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony.
97% of 421 Steam reviews are positivePlayers online now: 8$9.99
Space Haven
Build a spaceship tile by tile, keep its air breathable and its crew fed, then jump it toward a new home.
85% of 10,433 Steam reviews are positivePlayers online now: 626$24.99
Alien Horizon (Preview Alpha)
A sci-fi survival city builder set on an inhospitable alien planet.
87% of 209 Steam reviews are positivePlayers online now: 2Free
Newest games like Flat Worlds
Beyond These Stars
Found a settlement on a living Space Whale and journey across the galaxy together.
64% of 259 Steam reviews are positivePlayers online now: 75$29.99
The Crust
Build a lunar colony Earth depends on. Mine regolith, run conveyor-and-drone factories above and below the surface, keep your colonists fed and…
75% of 3,977 Steam reviews are positivePlayers online now: 538$19.19
Approximately Up
Assemble a ship from thousands of parts, wire its systems together, and take it to fifteen strange planets, alone or with friends.
93% of 1,167 Steam reviews are positivePlayers online now: 86$18.74
StarShip-DF
Build a massive multi-deck starship and lead colonists across the galaxy. Gather resources in space or land on alien worlds for supplies.
100% of 33 Steam reviews are positivePlayers online now: 1$5.99
SpaceCraft
Mine planets, assemble ships from parts and grow a trading empire with friends in an open galaxy.
63% of 2,730 Steam reviews are positivePlayers online now: 232$29.99
Astro Colony
Set up conveyor networks, dock your stations and research new tech at your own pace, alone or with friends.
80% of 2,440 Steam reviews are positivePlayers online now: 106$19.99
Possible One: Lunar Industries
Stake your claim in the first realistic lunar colony management game!
64% of 56 Steam reviews are positivePlayers online now: 1$24.99
Space Haven
Build a spaceship tile by tile, keep its air breathable and its crew fed, then jump it toward a new home.
85% of 10,433 Steam reviews are positivePlayers online now: 626$24.99
Outworld Station
Link modules with tubes, run supply chains across planets and build starships at your own pace, alone or with friends.
83% of 863 Steam reviews are positivePlayers online now: 31$18.99
Solar Expanse - Space Exploration Manager
Run a space company at your own pace, moving cargo across the solar system one careful calculation at a time.
87% of 1,343 Steam reviews are positivePlayers online now: 86$17.99
The Last Starship
Design a working starship from the reactor up, then take it into a fresh galaxy each run as a miner, pirate hunter or anything else you fancy.
75% of 1,644 Steam reviews are positivePlayers online now: 96$19.99
Solargene
Run a private space corporation across a realistically simulated solar system.
77% of 784 Steam reviews are positivePlayers online now: 18$34.99