Terraforming

Version

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This article is considered accurate for the current version (2.2) of the game.

This article is for the PC version of Stellaris only.

Terraforming is the act of changing the planet classification of a celestial body in order to make it more habitable for the empire's citizens. Terraforming also removes all tile blockers from the surface, as well as a subset of planet modifiers. The base technologies requires significant Society Research society research to unlock, while each terraforming project requires significant amounts of Energy Credits.png energy credits, and time.

Contents

Terraforming requirementsEdit

Terraforming is started via a button on the World Detail view. The world must be surveyed and within your borders. Only habitable-type worlds, Tomb Worlds, and special Barren Worlds that have the rare "Terraforming Candidate" modifier can be terraformed. The expansion planner screen can be used to find these rare candidates.

The requirements for terraforming a world depend on the magnitude of the change. A change within the same climate (wet, cold, dry) is faster and cheaper than a change between climates. Barren worlds are considered to be closer to Dry or Cold Climate, depending on the subtype.

Change Technology, Ascension Perk or Modifier required Energy Credits.png Cost Time Years
Within same climate Tech terrestrial sculpting.png Terrestrial Sculpting 2000 5
Different climate Tech terrestrial sculpting.png Terrestrial Sculpting 5000 10
Wet, Cold or Dry to Trait pc gaia preference.png Gaia Tech terrestrial sculpting.png Terrestrial Sculpting and Ap world shaper.png World Shaper Ascension Perk 10000 20
Wet, Cold, Dry, Trait pc gaia preference.png Gaia, Trait pc nuked preference.png Tomb or Hive World to Trait pc ring preference.png Machine World Tech terrestrial sculpting.png Terrestrial Sculpting and Ap machine worlds.png Machine Worlds Ascension Perk 10000 20
Wet, Cold, Dry, Trait pc gaia preference.png Gaia, Trait pc nuked preference.png Tomb or Trait pc ring preference.png Machine World to Hive World Tech terrestrial sculpting.png Terrestrial Sculpting and Ap hive worlds.png Hive Worlds Ascension Perk 10000 20
Trait pc ring preference.png Machine World to any Wet, Cold or Dry Tech climate restoration.png Climate Restoration 10000 20
Hive World to any Wet, Cold or Dry Tech climate restoration.png Climate Restoration 10000 20
Trait pc nuked preference.png Tomb to any Wet, Cold or Dry Tech climate restoration.png Climate Restoration 10000 20
Barren to any Dry Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 5000 10
Barren to any Wet Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 10000 15
Barren to any Cold Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 15000 20
Frozen Barren to any Cold Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 5000 10
Frozen Barren to any Wet Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 10000 15
Frozen Barren to any Dry Tech climate restoration.png Climate Restoration and Terraforming Candidate Modifier 15000 20

It is possible to terraform inhabited planets if you have the technology Tech ecological adaptation.png Ecological Adaptation. Doing so gives a -20% Mod pop happiness.png happiness penalty to the planet for the duration of the procedure.

Several planet modifiers are permanently removed after terraforming. The following modifiers are always lost when terraforming a planet:

  • PM Bleak.png Bleak
  • Irradiated Irradiated
  • PM Hazardous Weather.png Hazardous Weather
  • PM Dangerous Wildlife.png Hostile Fauna
  • PM Wild Storms.png Wild Storms

If the planet is being terraformed into a Trait pc ring preference.png Machine World, the following modifiers are also removed:

  • PM Atmospheric Hallucinogen.png Atmospheric Hallucinogen
  • PM Atmospheric Aphrodisiac.png Atmospheric Aphrodisiac
  • PM Lush.png Lush
  • PM Natural Beauty.png Natural Beauty

When and if terraforming a planet to Hive or Trait pc ring preference.png Machine World, keep in mind that all planetary features, including rare ones that give access to rare resources and even event spawned ones (such as Odd Factory), will always be removed.

Cost reduction & SpeedEdit

  • The edict Terraforming Gases increases terraforming speed by +50% at the base cost of 25Exotic gases.png Exotic Gases
  • The Ap world shaper.png World Shaper Ascension Perk decreases terraforming cost by -25%.
  • The ruler trait World shaper World Shaper increases terraforming speed by 25%.

Alternatives to terraformingEdit

Terraforming is only one way to allow a species to better live on a planet. Other methods include gene tailoring species to have a specific climate preference via the Tech glandular acclimation.png Glandular Acclimation technology or using synthetics to colonize otherwise uninhabitable worlds.

ReferencesEdit


Game concepts