Console:Precursors

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Please help with verifying or updating older sections of this article. At least some were last verified for version 2.8.

This article is for the console version of Stellaris only.
First League anomaly

The Precursors are long dead galactic empires predating even the fallen empires and the curators. Their ruins are scattered across the galaxy for the player to find via anomalies or archaeology sites. Precursor anomalies grant a special project which once investigated grants a small amount of Engineering research Engineering, Physics Research Physics or Society research Society research as well as a precursor artifact. 6 artifacts are required to reveal the location of a precursor's home system.

If every precursor anomaly has been investigated but no empire managed to collect 6 artifacts a random event can trigger every 20 years and add another precursor anomaly on one of the previously investigated planets. The time is lowered to 13.3 years for Gestalt consciousness.png Gestalt Consciousness empires.

AI empires can also sell a discovered artifact to Player empires for 1000 Energy.png Energy. If the Player empire has the Civic warrior culture.png Warrior Culture civic it can threaten the AI empire to surrender it for free, the success rate depending entirely on both empires' Relative Power. Empires that hold a Protective, Friendly or Loyal attitude will offer the artifact for free instead of asking for payment. Each AI Empire will only offer an artifact once.

Precursor civilizations[edit source]

There have been 5 precursor civilizations.

Precursor civilization Homeworld Homeworld reward Home system deposits Clues source Ancient Relics.png Secrets special project cost Ancient Relics.png Secrets special project rewards DLC
Cybrex Planet ringworld.png Ruined Ring World
  • Unity.png 240-9999 Unity
  • Engineering research 350-2000 Engineering research
  • Energy.png 350-2000 Energy
None Anomalies Engineering research 12000 Engineering research
  • Tech mega engineering.png Mega-Engineering technology unlocked
  • Mod megastructure build speed.png +10% Megastructure Build Speed
  • Engineering research Researcher gets Voidcraft.png Voidcraft expertise or 200 xp if already has it
None
First League Planet nuked.png Fen Habbanis III
  • Unity.png 240-9999 Unity
  • Society research 350-2000 Society research
  • Influence.png 150-300 Influence
  • Research.png 10 of all research resources
  • Minerals.png 10 Minerals
  • Energy.png 10 Energy
Anomalies Engineering research 6000 Engineering research
  • Research speed (Engineering) +15% Industry Research Speed
  • Mod planet building build speed mult.png +10% Planet Build Speed
  • Engineering research Researcher gets Industry.png Industry expertise or 200 xp if already has it
None
Irassian Concordat Planet barren cold.png Irassia
  • Unity.png 240-9999 Unity
  • Physics Research 350-2000 Physics research
  • Minerals.png 350-2000 Minerals
  • Research.png 10 of all research resources
  • Alloys.png 5 Alloys
  • Exotic gases.png 5 Exotic Gases
Anomalies Society research 3000 Society research
  • Research speed (society) +20% Biology Research Speed
  • Mod pop growth speed.png +5% Pop Growth Speed
  • Society research Researcher gets Biology.png Biology expertise or 200 xp if already has it
None
Vultaum Star Assembly Planet barren.png Vultaumar Prime
  • Unity.png 240-9999 Unity
  • Engineering research 250-1500 Engineering research
  • Physics Research 250-1500 Physics research
  • Society research 250-1500 Society research
  • Research.png 10 of all research resources
  • Energy.png 10 Energy
  • Alloys.png 5 Alloys
  • Exotic gases.png 5 Exotic Gases
Anomalies Physics Research 3000 Physics research
  • Research speed (Physics) +15% Computing Research Speed
  • Amenities.png +10% Amenities
  • Physics Research Researcher gets Computing.png Computing expertise or 200 xp if already has it
None
Yuht Empire Planet barren.png Yuthaan Majoris
  • Unity.png 240-9999 Unity
  • Energy.png 350-2000 Energy
  • Minerals.png 350-2000 Minerals
  • Research.png 10 of all research resources
  • Minerals.png 10 Minerals
  • Energy.png 10 Energy
  • Alloys.png 5 Alloys
  • Exotic gases.png 5 Exotic Gases
Anomalies Society research 3000 Society research
  • Decision animal wildlife.png Initiate Yuht Cleansing Process Decision
  • Society research Researcher gets New Worlds.png New Worlds expertise or 200 xp if already has it
None

Archaeological sites[edit source]

Archaeology Site

Archaeological Sites are areas where remains of ancient civilizations have been preserved relatively intact. They can be discovered while surveying, generated at game start or uncovered a few years after a planet is colonized. Each time a planet is surveyed there is a 1.25% chance of an archaeology site being discovered.

A site can have 1-6 Chapters in addition to an introduction Chapter. Each Chapter has its own narrative and rewards and has to be unlocked before it becomes visible. Chapters are unlocked via Excavation. As long as an Archaeological Site is within an empire's borders that empire can task a Science Ship to excavate the site. The duration of an Excavation is determined by the Archaeological Site's Difficulty rating and can be reduced by −25% if the Scientist on the Science Ship has the Leader trait archaeologist.png Archaeologist trait. As the Scientist goes through excavations, it will generate a random number from 1 to 10 and add modifiers to the result, with the following formula: Result = dice roll + archaeology skill + clues − difficulty. Additional events can also trigger at the end of each excavation.

From Gateway Sent[edit source]

The From Gateway Sent Archaeological Site is discovered by investigating the special project created by the Origins gateway.png Galactic Doorstep Origin.

Stage 1 2 3 4
Rewards Minor artifacts.png 1-5 Minor Artifacts Minor artifacts.png 1-5 Minor Artifacts Minor artifacts.png 1-5 Minor Artifacts
Physics Research 90-250 Physics Research
Minor artifacts.png 1-5 Minor Artifacts
Engineering research 120-350 Engineering Research

On the Shoulders of Giants sites[edit source]

The Origins one the shoulders of giant.png On the Shoulders of Giants Origin adds a lengthy Archaeological Site chain in the empire home system. The narration of the last two chapters of the final site are random but the rewards are always the same.

Site Chapter 1 rewards Chapter 2 rewards Chapter 3 rewards Chapter 4 rewards
Ex Gravitas Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts
  • Minerals.png 100-500 Minerals
  • Feature.png Something Waiting site location
Something Waiting Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png Buried Deep site location
Buried Deep Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png In Memoriam site location
No.png No.png
In Memoriam Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png The Last Stand site location
The Last Stand Minor artifacts.png 1-5 Minor artifacts Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Minor artifacts.png 1-5 Minor artifacts
  • Feature.png Dark Secret site location
Dark Secret Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Minerals.png 350-2000 Minerals
  • Alloys.png 250-1500 Alloys
  • Exotic gases.png 250-1500 Exotic Gases
Minor artifacts.png 1-5 Minor artifacts
  • Minor artifacts.png 1-5 Minor artifacts
  • Mod pop happiness.png Spurred by the Past empire modifier
  • Feature.png Once the Mid-Game year is reached an event chain will trigger

Excavation events[edit source]

If at the end of an Excavation phase the result is not high enough to grant a Clue or finish the Chapter then one of the following events may happen:

  • Science Ship Scientist dies, −2 Clues
  • Archaeology team members die, −1 Clues
  • A dangerous situation is avoided, +3 Clues
  • Choice to pay 100 Energy.png Energy to get +3 Clues or do nothing and get −2 Clues
  • Science Ship Scientist gains the Leader trait maimed.png Maimed trait


Excavation Time[edit source]

Assuming you never get any of the aforementioned events, the average number of rolls required to complete the chapter can be read from this table. "S + C - D" is the scientist's archeology skill, plus clues, minus difficulty. A level 3 scientist with Tech archeology lab.png Curator Archaeology Lab tech researched and 2 clues, excavating a level 4 chapter, would have an S + C - D of 5 + 2 - 4 = 3, and will need slightly under four and a half more rolls, on average, to complete the chapter.

S + C - D Expected Rolls
-4 29.85
-3 19.85
-2 14.85
-1 11.51
0 9.01
1 7.01
2 5.54
3 4.40
4 3.39
5 2.73
6 2.29
7 1.96
8 1.70
9 1.49
10 1.33
11 1.2
12 1.1
13 1
14 1

References[edit source]

Game concepts
Exploration ExplorationFTLAnomalyArchaeological siteRelicsPre-FTL speciesFallen empireEventsSpaceborne aliensGuardiansMaraudersCaravaneers
Celestial bodies Celestial bodyColonizationTerraformingPlanetary featuresPlanet modifiers
Species SpeciesTraitsPopulationPop modificationSpecies rightsEthics
Governance EmpireGovernmentCivicsPoliciesEdictsLeaderFactionsTechnologyTraditionsSituations
Economy EconomyPlanetary managementDistrictsBuildingsHoldingsJobsDesignationTradeMegastructures
Diplomacy DiplomacyRelationsGalactic communityFederationsSubject empiresIntelligenceAI personalities
Warfare WarfareSpace warfareLand warfareStarbaseShipShip designerCrisis
Others The ShroudL-ClusterUnique systemsPreset empiresAI playersEaster eggs