Planetbase artwork$14.9979%
Colony sim pick

Planetbase Keep them breathing out there

Guide a handful of space settlers as they turn a bare landing site into a self-sufficient planetbase. You place the domes, mines, and farms, balance oxygen, water, food, and power, and keep everyone alive through meteors, sandstorms, and solar flares. Simple to start, strict about mistakes.

Screenshots

Keep everyone breathing, fed, and powered

You are the architect and manager, not one of the settlers. You pick where domes, mines, solar panels, wind turbines, water extractors, and hydroponic farms go, and your colonists build and work them.

Everything runs together. No energy means no oxygen, no water, no cooked meals. You grow vegetables, synthesize vitromeat, mine metal, process resources, and set up production chains that turn raw goods into parts, spares, and bots.

Four planets raise the difficulty, with different light, wind, and weather to plan around. Grow from a few pioneers to hundreds of colonists, if your airlocks and power grid hold.

Small layout mistakes become big stories

Planetbase rewards short paths and careful planning. A well-placed mine, processing plant, and biodome with the right workers beats a sprawling base where colonists spend half the day walking to dinner.

Immigration is yours to manage, so you take in the skills you actually need: miners, biologists, engineers, medics, guards. Then you ride out what the planet throws at you, from meteors and sandstorms to solar flares and armed intruders.

When it breaks, it breaks in sequence. One failed harvest or power dip turns into empty storage, hungry workers, and slow repairs, which is exactly what colony sim fans come for.

Good to know before you land?

How do you actually run the colony?

You do not give orders to individuals. You place structures, connect power and water, set production, and manage who joins the colony. Colonists choose jobs by skill and need, build what you place, haul resources, and keep systems running. Your job is priorities and placement: where the farm sits, how many miners you accept, when to expand.

What do you eat out there?

Farmed vegetables and synthesized vitromeat, cooked into meals. You balance farm output, processing, and storage so cooks have ingredients and everyone stays fed through storms and dark periods. Starch, metals, and bioplastics feed the other half of the base: processing plants, factories, and robotics facilities that keep construction and repairs going.

What tries to kill your base?

Weather and physics first: meteors, sandstorms, solar flares, plus nights with no solar and stretches with no wind. Then intruders who attack the base, which is where guards and security posts matter. Survival means spare power, stored oxygen, water, and food, plus bots to take over the heavy hauling and mining when colonists are stretched thin.

Solargene

Solargene

Run a private space corporation and spread housing, mines, and farms from Mercury to the Kuiper Belt.

77% of 784 Steam reviews are positivePlayers online now: 18$34.99
Alien Horizon (Preview Alpha)

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
Oxygen Not Included

Oxygen Not Included

Oxygen Not Included is a space-colony sim where three Duplicants wake up inside an asteroid and immediately start using up the air.

96% of 136,314 Steam reviews are positivePlayers online now: 7,551$24.99
Astro Colony

Astro Colony

Astro Colony is a space colony sim about building a moving station that eats planets.

80% of 2,440 Steam reviews are positivePlayers online now: 106$19.99
Mercury Fallen

Mercury Fallen

A sci-fi colony management sim with a focus on exploration, expansion, and survival.

78% of 259 Steam reviews are positivePlayers online now: 2$24.99
Aven Colony

Aven Colony

Aven Colony puts you in charge of humanity's first settlement on Aven Prime, growing small outposts into sprawling cities across deserts, tundras…

71% of 2,021 Steam reviews are positivePlayers online now: 18$5.99
Sol 0: Mars Colonization

Sol 0: Mars Colonization

Sol 0 is a real time strategy game where you establish the first Martian colony.

67% of 371 Steam reviews are positive$0.99
Stranded: Alien Dawn

Stranded: Alien Dawn

Stranded: Alien Dawn strands a small group of survivors on a living alien world and hands you their food, health and morale.

83% of 9,921 Steam reviews are positivePlayers online now: 563$34.99
Earth Space Colonies

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
Space Colony: Steam Edition

Space Colony: Steam Edition

Halfway across the galaxy, your colony lives or dies on its people.

78% of 574 Steam reviews are positivePlayers online now: 8$14.99
Dawn Apart

Dawn Apart

Dawn Apart is a space colony and factory sim with fully destructible environments.

67% of 247 Steam reviews are positive$19.99
Dawn of Man

Dawn of Man

Lead a handful of Stone Age humans through 10,000 years to the Iron Age.

86% of 17,165 Steam reviews are positivePlayers online now: 310$24.99