Anomaly

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Revision as of 23:12, 18 January 2020 by Kami-sama (talk | contribs) (Repeatable anomalies)
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Please help with verifying or updating older sections of this article. At least some were last verified for version 2.5.

This article is for the PC version of Stellaris only.

An anomaly is represented by survey readings that deviate from what is normal. When a science ship surveys a celestial body it may identify an anomaly that needs further investigation. Anomalies have their own tab in the Situation Log.

When the investigation of an anomaly is complete, an event will pop up that can give various bonuses, such as research points, resources on a planet, or even a special project which requires further research investment to unlock benefits. Certain Ethics occasionally have additional options.

Each surveyed celestial body has a 5% chance of spawning an anomaly, which is increased by 0.5% for every surveyed planet with no anomaly before being reset. The Leader trait meticulous.png Meticulous trait also increases the chance of finding anomalies by 10%.

Level

To investigate an anomaly, a science ship with a scientist on board must be present at the celestial body where the anomaly is located. Investigating them takes time, which is determined by the level of the scientist minus the difficulty level of the anomaly. As such, anomalies of higher levels are often best left off until a skilled scientist can study them faster.

Level difference Investigation days
+9 (Inconsequential) 20
+8 (Inconsequential) 24
+7 (Trivial) 30
+6 (Trivial) 35
+5 (Very Easy) 45
+4 (Very Easy) 55
+3 (Easy) 65
+2 (Easy) 80
+1 (Routine) 100
0 (Routine) 120
Level difference Investigation days
-1 (Routine) 180
-2 (Challenging) 300
-3 (Challenging) 540
-4 (Hard) 720
-5 (Hard) 1080
-6 (Very Hard) 1440
-7 (Very Hard) 2160
-8 (Hellish) 2880
-9 (Hellish) 5760

Anomaly List

Each Anomaly can only be found x times where x is the number of possible outcomes. Once a certain outcome of an anomaly has occurred, the same outcome cannot happen if the anomaly is discovered again.

Anomaly Level Outcomes Celestial body
Abandoned Station 3 1 Planet asteroid.png Asteroid
Alien Machine 3 1 Planet asteroid.png Asteroid
An Asteroid, Carved 3 1 Planet asteroid.png Asteroid
Asteroid Collision 1 1 Planet asteroid.png Asteroid
Asteroid Waves 1 4 Planet asteroid.png Asteroid
Astonishing Asteroids 6 1 Planet asteroid.png Asteroid
Covered in Debris 3 1 Planet asteroid.png Asteroid
Crashed Ship 3 2 Planet asteroid.png Asteroid
Dimensional Disturbance 6 2 Planet asteroid.png Asteroid
Docking Hatch 3 2 Planet asteroid.png Asteroid
Dustbowl 1 3 Planet asteroid.png Asteroid
Energy Emissions 1 2 Planet asteroid.png Asteroid
Mind the Minerals 2 1 Planet asteroid.png Asteroid
Mineral Cluster 3 4 Planet asteroid.png Asteroid
Mystical 7 1 Planet asteroid.png Asteroid
Odd Readings 6 2 Planet asteroid.png Asteroid
Orbital Speed Demon 4 1 Planet asteroid.png Asteroid
Radiating Asteroid 7 1 Planet asteroid.png Asteroid
Spacecraft Remains 4 1 Planet asteroid.png Asteroid
Unknown Insides 3 1 Planet asteroid.png Asteroid
Unknown Origin 1 2 Planet asteroid.png Asteroid
Icy Plains 4 1 Planet arctic.png Arctic
Arid and Abandoned 6 1 Planet arid.png Arid
Arid Wastes 3 1 Planet arid.png Arid
Looking Down 6 2 Planet barren.png Barren
On the Barren Plains 5 1 Planet barren.png Barren
Winking 5 1 Planet barren.png Barren
Continental Findings 1 3 Planet continental.png Continental
Buried in the Sand 4 2 Planet desert.png Desert
Desolate Sands 1 1 Planet desert.png Desert
Dunes 3 3 Planet desert.png Desert
Aerostat Structures 1 2 Planet gas giant.png Gas Giant
Atmospheric Object 4 2 Planet gas giant.png Gas Giant
Atmospheric Storms 1 1 Planet gas giant.png Gas Giant
Cargo Pod 1 1 Planet gas giant.png Gas Giant
Clouds Dance 1 1 Planet gas giant.png Gas Giant
Gas Giant Ship 5 1 Planet gas giant.png Gas Giant
Gas Giant Signal 5 1 Planet gas giant.png Gas Giant
Ice Ice Giant 6 1 Planet gas giant.png Gas Giant
Promising Moon 1 1 Planet gas giant.png Gas Giant
Space Debris 1 1 Planet gas giant.png Gas Giant
Terminal Orbit 5 1 Planet gas giant.png Gas Giant
Anomaly Level Outcomes Celestial body
Cold Hard Potential 3 4 Planet frozen.png Frozen
Cold Wastes 2 2 Planet frozen.png Frozen
Ice Lit 3 1 Planet frozen.png Frozen
Something Smells 2 1 Planet frozen.png Frozen
Minesweeper 2 1 Planet gaia.png Gaia
Paradise Anticipated 3 1 Planet gaia.png Gaia
Heated Rhythm 2 1 Planet molten.png Molten
Drops in the Ocean 3 1 Planet ocean.png Ocean
Kaleidoscopic 2 1 Planet ocean.png Ocean
The Winter of the Fallen 3 1 Planet nuked.png Tomb
Impossible Organism 6 1 Planet toxic.png Toxic
Pigment Poison 7 1 Planet toxic.png Toxic
Poison-coated 2 1 Planet toxic.png Toxic
Signs of Former Habitation 1 2 Planet toxic.png Toxic
Toxic Construction 8 1 Planet toxic.png Toxic
Toxicity 3 1 Planet toxic.png Toxic
Among the Vines and Trees 3 1 Planet tropical.png Tropical
Scurrying 4 1 Planet tropical.png Tropical
Tropical Oddities 3 1 Planet tropical.png Tropical
Wooden Hegemony 3 1 Planet tropical.png Tropical
Possible Inhabitants 3 1 Any Dry Planet
Spotty Greenery 4 2 Any Wet Planet
Monoliths 3 1 Any Habitable Planet
Steamrolled 1 1 Any Habitable Planet
What Hums in the Night 5 2 Any Habitable Planet
Ancient Shipyard 4 1 Any Uninhabitable Planet
Asteroid in Orbit 1 1 Any Uninhabitable Planet
Atmospheric Anomaly 3 1 Any Uninhabitable Planet
Doppler Effect 3 1 Any Uninhabitable Planet
Life Signs 2 1 Any Uninhabitable Planet
Massive Impact 2 2 Any Uninhabitable Planet
Projecting 3 1 Any Uninhabitable Planet
Signs of Battle 4 1 Any Uninhabitable Planet
Solar Sailer 2 1 Any Uninhabitable Planet
Space Station 1 1 Any Uninhabitable Planet
Strange Mountain Formation 3 1 Any Uninhabitable Planet
Surface Beacon 1 1 Any Uninhabitable Planet
Surface Writing 2 1 Any Uninhabitable Planet
Unidentified Object 2 1 Any Uninhabitable Planet
Unusual Energy Readings 2 4 Any Uninhabitable Planet
Weak Signal 2 2 Any Uninhabitable Planet
Playful Ruins 3 1 Any Planet
Improbable Orbit 5 1 Any Star
Rainbow in the Dark 5 2 Black Hole.png Black Hole

The following Anomalies require the Distant Stars.png Distant Stars DLC and have only one possible outcome.

Anomaly Level Celestial body
Alien Machine 3 Planet asteroid.png Asteroid
Armed Vessel 3 Planet asteroid.png Asteroid
Secret Heart 5 Planet asteroid.png Asteroid
Unscannable Object 1 Planet asteroid.png Asteroid
Waterless Canyons 1 Planet barren.png Barren
Gray Goo 4 Planet frozen.png Frozen
Inconsistent Readings 1 Planet frozen.png Frozen
Metallic Crystal Formations 2 Planet frozen.png Frozen
Alien Activity 3 Planet gaia.png Gaia
Familiar Compounds 2 Planet gas giant.png Gas Giant
Movement in the Clouds 2 Planet gas giant.png Gas Giant
Solid Core 3 Planet gas giant.png Gas Giant
Volcanic Vents 1 Planet molten.png Molten
Deep Tunnels 1 Planet ocean.png Ocean
Impenetrable Clouds 1 Planet toxic.png Toxic
Mysterious Construct 5 Planet toxic.png Toxic
Fleet Signatures 4 Black Hole.png Black Hole
Heavy Pulse 2 F Star.png Class F Star
42 Years and 3 Days 3 Any Habitable Planet
Abandoned Settlements 4 Any Habitable Planet
Alien Life 3 Any Habitable Planet
Attractive Magnetism 1 Any Habitable Planet
Bizarre Blanket 1 Any Habitable Planet
Corrupt Survey Data 4 Any Habitable Planet
Isolated Ruin 2 Any Habitable Planet
Megaflora 1 Any Habitable Planet
Resonant Crystals 1 Any Habitable Planet
Overgrown Ruins 6 Any Habitable Planet
Peculiar Patterns 3 Any Habitable Planet
Deep Caverns 7 Any Uninhabitable Planet
Webwork 2 Any Uninhabitable Planet
Silent Behemoth 2 Any Uninhabitable Moon
Unusual Moon 3 Any Uninhabitable Moon
Encrypted Transmission 2 Any Planet
Supply Ship Wreckage 2 Any Planet
Interference 1 Any Star
Irregular Energy Emissions 4 Any Star

Repeatable anomalies

There are two types of repeatable anomalies. The first is the Ancient Signs of Life anomaly, which can only be found on Planet barren.png Barren worlds and will add the PM Terraforming Candidate.png Terraforming Candidate planet modifier once investigated. The second are anomalies with the name randomized based on the planet class which will reveal a pre-sapient species on the planet once investigated. Such an anomaly can be triggered once for each planet class, including Trait pc gaia preference.png Gaia and Trait pc nuked preference.png Tomb worlds.

Pioneer 11

If the Sol system is present in the galaxy a random Asteroid might reveal a level 3 Debris Field Anomaly. Investigating it will discover the Pioneer 11 probe. If the empire is human it will gain 40-100 Influence.png Influence. If the empire is alien on the other hand it will bring the following options:

  • Decipher the data disk and gain 120-250 Engineering Research Engineering Research while the science ship leader gains 200 Experience. The location of the Sol system is added to the situation log. Entering the system will grant 80-175 Influence.png Influence.
  • Sell the data disk and gain 120-250 Engineering Research Engineering Research.
  • Use the data disk as furniture and gain 40-100 Influence.png Influence if Xenophobe.png Xenophobe or Fanatic Xenophobe.png Fanatic Xenophobe.

Media coverage

A number of anomaly events can be solved in ways that will impact an empire's media views on the empire if not Gestalt consciousness.png Gestalt Consciousness. Such outcomes bring a Mod pop happiness.png Happiness modifier for 10 years.

Media Coverage modifier Happiness
Extremely Positive +40%
Very Positive +25%
Positive +10%
Negative -10%
Very Negative -20%
Extremely Negative -30%
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