Precursors

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Please help with verifying or updating older sections of this article. At least some were last verified for version 3.0.

This article is for the PC 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.

Players can spend 25 Arcane technology.png Minor Artifacts to discover an precursor site with a cooldown of 5 years.

Once a Precursor homeworld has been discovered the empire will gain an artifact action to spend 50 Arcane technology.png Minor Artifacts to start a special project to delve into the secrets of one of the Precursor civilization. Finishing the special project will grant a permanent empire benefit. If the DLC is installed precursor anomalies will also grant 1-5 Arcane technology.png Minor Artifacts.

Precursor civilizations

There have been 7 precursor civilizations, 2 of them requiring the Ancient Relics.png Ancient Relics DLC.

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 1000-10000 Engineering research
  • Energy.png 350-2000 Energy
  • Ancient Relics.pngArcane technology.png 10-30 Minor Artifacts
  • Ancient Relics.pngR war forge.png Cybrex War Forge Relic
  • Ancient Relics.png Secrets of the Cybrex artifact action
None Anomalies Engineering research 12000 Engineering research
  • Tech mega engineering.png Mega-Engineering technology research option[1]
  • 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 1000-10000 Society research
  • Influence.png 150-300 Influence
  • Ancient Relics.pngArcane technology.png 10-30 Minor Artifacts
  • Ancient Relics.png Secrets of the First League artifact action
  • Research.png 10 of all research resources
  • Minerals.png 10 Minerals
  • Energy.png 10 Energy
Anomalies Engineering research 6000 Engineering research
  • Tech housing 1.png Weather Control Systems
  • Tech housing 2.png Anti-Gravity Engineering[2]
  • 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 1000-10000 Physics research
  • Minerals.png 350-2000 Minerals
  • Ancient Relics.pngArcane technology.png 10-30 Minor Artifacts
  • Ancient Relics.pngR pox sample.png Javorian Pox Sample Relic
  • Ancient Relics.png Secrets of the Irassians artifact action
  • Research.png 10 of all research resources
  • Alloys.png 5 Alloys
  • Exotic gases.png 5 Exotic Gases
Anomalies Society research 3000 Society research
  • Biology.png Next Organic pops technology Tech genome mapping.pngTech frontier health.pngTech frontier health.pngTech gene tailoring.png[3]
  • Research speed (society) +20% Biology Research Speed
  • Mod pop growth req.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 500-10000 Engineering research
  • Physics Research 500-10000 Physics research
  • Society research 500-10000 Society research
  • Ancient Relics.pngArcane technology.png 10-30 Minor Artifacts
  • Ancient Relics.pngR orb insight.png Vultaum Reality Perforator Relic
  • Ancient Relics.png Secrets of the Vultaum artifact action
  • 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
  • Physics Research 1000-10000 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


Fanatic Materialist.png Fanatic Materialist receive option for an additional special project.
  • When the additional special project gets completed there are 2 options:
  • Option 1:
  • - Influence.png 150-300 Influence
  • - Physics Research Researcher 50% commits suicide, 35% gets Leader trait maniacal.pngLeader trait substance abuser.png or 15% gets Leader trait maniacal.png
  • Option 2:
  • - Influence.png 150-300 Influence
  • - Unity.png 700 - 4000 Unity
  • - Mod country all tech research speed.png +10% Research Speed
  • - Mod pop happiness.png -20% Happiness
  • - Physics Research Researcher 35% gets Leader trait maniacal.pngLeader trait substance abuser.png or 65% gets Leader trait maniacal.png
None
Yuht Empire Planet barren.png Yuthaan Majoris
  • Unity.png 240-9999 Unity
  • Energy.png 350-2000 Energy
  • Minerals.png 350-2000 Minerals
  • Ancient Relics.pngArcane technology.png 10-30 Minor Artifacts
  • Ancient Relics.pngR cryo core.png Yuht Cryo Core Relic
  • Ancient Relics.png Secrets of the Yuht artifact action
  • 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
  • Tech colonization 2.png Atmospheric Filtering
  • Tech colonization 3.png Hostile Environment Adaptation[4]
  • 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
Baol Planet nuked.png Grunur
  • R baol.png The Last Baol Relic
  • Secrets of the Baol artifact action
None Archaeology sites Society research 3000 Society research
  • Tech epigenetic triggers.png Epigenetic Triggers technology or Tech terrestrial sculpting.png Terrestrial Sculpting technology[5]
  • Mod country terraforming cost.png -15% Terraforming Cost
  • Society research Researcher gets Biology.png Biology expertise or 200 xp if already has it
Ancient Relics.png
Zroni Planet shroud.png Zron Prime
  • R zro crystal.png Psionic Archive Relic
  • Secrets of the Zroni artifact action
Zro.png 5 Zro Archaeology sites Society research 6000 Society research
  • Tech psionic theory.png Psionic Theory technology progress[6]
  • Research speed (society) +10% Psionics Research Speed
  • Society research Researcher gets Psionics.png Psionics expertise or 200 xp if already has it
Ancient Relics.png

Archaeological sites

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.

Site Chapter 1 rewards Chapter 2 rewards Chapter 3 rewards Chapter 4 rewards Requirements
Ancient Battle Site
Evt landing ship.png
Society research 350-10000 society research Arcane technology.png 6-10 Minor artifacts
75% chance
Menu icon technology.png Random Tier 2 Technology[7]
25% chance
Society research 1000-10000 society research
No.png No.png Uninhabitable planet
Strange Asteroid
Evt asteroid field.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 6-10 Minor artifacts
75% chance
Menu icon technology.png Random Tier 2 Technology[7]
25% chance
Society research 1000-10000 society research
No.png No.png Planet asteroid.png Asteroid
City of Bones
Evt relic world street.png
Arcane technology.png 5 Minor artifacts Arcane technology.png 5 Minor artifacts
Different reward if empire Auth machine intelligence.png machine intelligence
No.png Planet gaia.png Gaia or Dry planet
Frozen Complex
Evt frozen planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 2 outcomes:
  • Society research 500-10000 Society research
  • Tech plasma 2.png Plasma Accelerators technology progress[8]
No.png Planet frozen.png Frozen
Mutant Fossils
Evt scanning remains.png
Arcane technology.png 5 Minor artifacts Arcane technology.png 5 Minor artifacts D metal boneyard.png Mutation Vats Planetary Feature No.png Planet nuked.png Tomb
Ruins
Evt dead city.png
Arcane technology.png 1-5 Minor artifacts
2 outcomes:
  • Society research 500-10000 society research
  • Engineering research 500-10000 engineering research
2 outcomes:
  • Society research 500-10000 society research
  • Engineering research 500-10000 engineering research
Arcane technology.png 6-10 Minor artifacts
Society research 500-10000 society research
Adds lvl 3 anomaly "Alien Site" to a random body in the same system
No.png Uninhabitable planet
Subterranean Hollows
Evt underground civilization.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Tech colonization 3.png Hostile Environment Adaptation technology if not researched
Society research 1000-10000 society research if researched
No.png Habitable planet
The Endless Expanse
Evt frozen planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 10-30 Minor artifacts

choice of:

  • Feature.png Ix Belèn site location
  • Influence.png 500 Influence
Planet frozen.png Frozen
Ix Belèn
Evt gas giant station.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts

choice of:

  • The Memorex modifier on capital
    • Alloys.png 3500 Alloys
    • Influence.png 500 Influence
Planet gas giant.png Gas Giant near The Endless Expanse

From Gateway Sent

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

Chapter 1 2 3 4
Rewards Arcane technology.png 1-5 Minor Artifacts Arcane technology.png 1-5 Minor Artifacts Arcane technology.png 1-5 Minor Artifacts
Physics Research 90-250 Physics Research
Arcane technology.png 1-5 Minor Artifacts
Engineering research 120-350 Engineering Research

On the Shoulders of Giants sites

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
Evt cold barren planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Minerals.png 100-500 Minerals
  • Feature.png Something Waiting site location
Something Waiting
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png Buried Deep site location
Buried Deep
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png In Memoriam site location
No.png No.png
In Memoriam
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Feature.png The Last Stand site location
The Last Stand
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon technology.png Random Technology
  • Arcane technology.png 1-5 Minor artifacts
  • Feature.png Dark Secret site location
Dark Secret
Evt cold barren planet.png
Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Minerals.png 350-2000 Minerals
  • Alloys.png 250-1500 Alloys
  • Exotic gases.png 250-1500 Exotic Gases
Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.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

Ancient Relics sites

All other Archaeological Sites in the game require the Ancient Relics DLC to be found.

Site Chapter 1 rewards Chapter 2 >rewards Chapter 3 rewards Chapter 4 rewards Chapter 5 rewards Chapter 6 rewardsm Requirements
Ruined Star System
Evt tomb world.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • TBA
  • TBA
  • TBA
No.png No.png Unique System
Relic Rails
Evt archaeological dig.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 6-10 Minor artifacts
  • Research.png Research modifier for 15 years
No.png No.png Housing.png Housing building
Chthonic Siren
Evt clocks.png
TBA TBA TBA TBA TBA
Desiccated
Evt warm barren planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts TBA No.png TBA
Ruined World
Evt relic world.png
Arcane technology.png 1-5 Minor artifacts 2 outcomes:
  • Society research 350-10000 Society Research
  • Engineering research 350-10000 Engineering Research
Arcane technology.png 1-5 Minor artifacts R omnicodex.png Omnicodex relic No.png No.png Size 25 Planet nuked.png Relic
Asteroid Blast Door
Evt barren dig site.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 50, 75 or 100 Minor artifacts No.png No.png Planet asteroid.png Asteroid
Fossilized Remains
Evt archaeology camp.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts No.png Colony
Ancient Tomb
Evt excavation team.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Mid-Game
  • Uninhabitable planet
  • Holy Guardians exist
Moon Base
Evt barren dig site.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Feature.png Abandoned Ecumenopolis site spawns in system
No.png No.png No.png Unique System
Abandoned Ecumenopolis
Evt overgrown city.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts No.png No.png Finishing the "Moon Base" dig site
Gas Giant Structure
Evt gas giant station.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 6-10 Minor artifacts
  • Energy.png 4000 Energy
No.png No.png Planet gas giant.png Gas Giant
Robot Debris
Evt space debris.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 6-10 Minor artifacts
  • Engineering research 2000-10000 Engineering research
No.png No.png No.png Planet asteroid.png Asteroid
Crashed Starship
Evt crashed station.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 10-30 Minor artifacts Uninhabitable planet
Moon Bump
Evt relic world street.png
Arcane technology.png 1-5 Minor artifacts 3 outcomes: No.png No.png No.png No.png Uninhabitable planet
The Echoes Inside
Arid planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Society research 1000-10000 Society research No.png No.png Planet barren.png Barren
Target from Orbit
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech power plant 3.png Quantum Energy States[11]
  • Minerals.png 1000 Minerals
  • Tech biolab 2.png Xenobiology[12]
No.png No.png No.png Uninhabitable planet
Hole in the Ground
Evt big landing ship.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech shields 4.png Advanced Shields tech[11]
  • Tech mining 2.png Deep Core Mining[13]
  • Tech alien life studies.png Xenology[12]
No.png No.png No.png Uninhabitable planet
Too Angled
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
10% chance
Tech mega art.png Mega Art Installation[12]
45% chance
Tech terrestrial sculpting.png Terrestrial Sculpting[14]
45% chance
Tech space mining 3.png Mineral Cutting Beams[15]
No.png No.png No.png Uninhabitable planet
Déjà Vu Dig
Evt archaeology camp.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech physics lab 3.png Space-Time Theory[16]
  • Tech tb deep sinkhole.png Subterranean Colonization[17]
  • Tech tomb world adaption.png Tomb World Adaptation[18]
No.png No.png No.png Uninhabitable planet
Trench World
Tundra planet.png
Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech combat training.png Combat Training[19] and permanent empire modifier ‘Modern Trench War’ Mod army health.png +20% defense army health
  • Tech robotic workers.png Robotic Workers [20]
  • Tech tb massive glacier.png Climate Control Network[11]
No.png No.png No.png No.png Planet barren.png Barren
Any Other Rock
Evt warm barren planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
66% chance
Permanent empire modifier: Unity.png +5% monthly unity
33% chance
Volatile motes.pngExotic gases.pngRare crystals.png +200 of each strategic resource
No.png No.png Planet molten.png Molten
Beautiful Bubble
Evt big landing ship.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
66% chance
Society research 1000-10000 Society research
33% chance
‘Anthem of Aurora’ empire modifier Energy.png +5% monthly energy
No.png No.png No.png Uninhabitable planet
Get Inside
Evt alien ruins.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech colonization 3.png Hostile Environment Adaptation[21]
  • Tech tb volcano.png Deep Crust Engineering[22]
  • If Gestalt consciousness.pngAuth hive mind.png then Tech unity of purpose.png Unity of Purpose[23] else Tech artificial moral codes.png Artificial Moral Codes[23]
No.png No.png No.png Uninhabitable planet
Anyone Home?
Evt overgrown city.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech colonization 3.png Hostile Environment Adaptation[12]
  • Volatile motes.pngExotic gases.pngRare crystals.png +150 of each strategic resource and Society research 1000-10000 society research
  • Tech biolab 3.png Secrets of Life[12]
No.png No.png Uninhabitable planet
The Grand Herald
Evt ancient alien temple.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon fleet manager.png Titan (25-75% damaged)
Planet nuked.png Tomb, Planet desert.png Desert,
Planet arid.png Arid or Planet savannah.png Savanna
Beneath the Waves
Evt ship in orbit 2.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech colonization 2.png Atmospheric Filtering[24]
  • Tech colonization 2.png Atmospheric Filtering[25]
  • Tech ecological adaptation.png Ecological Adaptation[12]
No.png No.png No.png Planet ocean.png Ocean
Get to the Bottom
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech tb toxic kelp.png Ocean Ecology Management[26] + Engineering research 1000-10000 engineering research
  • Tech ecological adaptation.png Ecological Adaptation[15]
  • Tech terrestrial sculpting.png Terrestrial Sculpting[15]
No.png No.png No.png Planet ocean.png Ocean
Dotted Archipelago
Evt ocean planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Exotic gases.png +250 Exotic gases
  • Tech vitality boosters.png Vitality Boosters[12]
  • Tech biolab 2.png Xenobiology[12]
No.png No.png No.png Planet ocean.png Ocean
Popular Rock
Evt ice asteroids.png
Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Physics ResearchSociety researchEngineering research 500-10000 of each research area
  • Alloys.png +500 Alloys, Volatile motes.pngExotic gases.png +150 Volatile motes and Exotic gases
  • Tech cryostasis 2.png Self-Aware Colony Ships[15]
No.png No.png No.png No.png Planet asteroid.png Asteroid
Strange Flows
Evt glitchy matrix.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes:
  • Tech tb volcano.png Deep Crust Engineering[27]
  • Tech disruptors 2.png Ion Disruptors[11]
  • Tech alloys 2.png Nano-Separators[15]
No.png No.png No.png Planet molten.png Molten
Never Forget
Evt tomb world.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Permanent empire modifier: A Life Worthwhile Mod pop happiness.png +5% Happiness No.png No.png No.png Uninhabitable planet
Message in the Dust
Evt ship in orbit.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts 3 outcomes
  • Arcane technology.png 1-5 Minor artifacts
  • Menu icon fleet manager.png 1 Corvette
    (25-75% damaged)[28]
No.png Planet nuked.png Tomb, Planet desert.png Desert,
Planet arid.png Arid or Planet savannah.png Savanna
Whispers in the Stone
Evt hidden door.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 10-30 Minor artifacts
  • Rare crystals.png 500 Rare Crystals
  • Building Lithoid Crystal Plants
  • TBA
No.png District mining.png Mining District
Kleptomaniac Rats
Evt relic world.png
Arcane technology.png 6-10 Minor artifacts Arcane technology.png 6-10 Minor artifacts Arcane technology.png 6-10 Minor artifacts Arcane technology.png 6-10 Minor artifacts No.png Planet nuked.png Relic
Hidden Worlds
Evt crashed station.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts choice of:
  • The Oracle Leader trait oracle.png Governor
  • Oracle empire modifier
    • Alloys.png 1000 Alloys
    • Engineering research 3500 Engineering Research
    • Influence.png 500 Influence
No.png No.png Habitable planet
The Library
Evt archaeological dig.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts TBA TBA Planet barren.png Barren
Ruined Station
Evt space debris.png
Arcane technology.png 1-5 Minor artifacts TBA Arcane technology.png 1-5 Minor artifacts TBA No.png No.png Neutron Star or Pulsar
One Last Hope
Evt ocean planet.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts TBA TBA
The Broken Gates
Evt baol 5.png
Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts Arcane technology.png 1-5 Minor artifacts TBA Star, Gas Giant, Asteroid or Black Hole and need to be gestalt

Precursor sites

Precursor Archaeology Sites are visible only to the empire that starts the event chain and are used to advance the Baol and Zroni event chains. When a Zroni Archaeology Site is discovered the planet will gain a deposit of 2-4 Zro.png Zro.

Precursor Site Chapter 1 rewards Chapter 2 rewards Chapter 3 rewards Chapter 4 rewards Chapter 5 rewards
Baol Grunur Ruins
Evt baol 1.png
Arcane technology.png 5 Minor artifacts
  • Arcane technology.png 5 Minor artifacts
  • Feature.png The Barren site location
No.png No.png No.png
The Barren
Evt warm barren planet.png
Arcane technology.png 5 Minor artifacts Arcane technology.png 5 Minor artifacts
  • Arcane technology.png 5 Minor artifacts
  • Feature.png The Shattered site location
No.png No.png
The Shattered
Evt asteroid field.png
Arcane technology.png 5 Minor artifacts Arcane technology.png 5 Minor artifacts Arcane technology.png 5 Minor artifacts
  • Arcane technology.png 5 Minor artifacts
  • Feature.png The Silenced site location
No.png
The Silenced
Evt baol 5.png
Arcane technology.png 5 Minor artifacts
  • Arcane technology.png 6-10 Minor artifacts
  • Feature.png Grunur system location
No.png No.png No.png
Zroni Abandoned Colony Ruins
Evt overgrown city.png
Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Physics Research 350-10000 Physics research
  • Arcane technology.png 1-5 Minor artifacts
  • Tech psionic theory.png Psionic Theory technology if not researched or Gestalt consciousness.png Gestalt Consciousness
  • Society research 1000-10000 society research if researched or Gestalt consciousness.png Gestalt Consciousness
  • Feature.png Zroni Minor Colony site location
No.png No.png
Zroni Minor Colony
Evt overgrown city.png
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 350-10000 Society research
  • Arcane technology.png 1-5 Minor artifacts
  • Feature.png Zroni Minor Colony site location
No.png No.png No.png
Zroni Minor Colony
Evt overgrown city.png
  • Arcane technology.png 1-5 Minor artifacts
  • Arcane technology.png 1-5 Minor artifacts
  • Feature.png Zroni Minor Colony site location
No.png No.png No.png
Zroni Minor Colony
Evt baol 2.png
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 350-10000 Society research
  • Arcane technology.png 1-5 Minor artifacts
  • Feature.png Zroni Major Colony site location
No.png No.png No.png
Zroni Major Colony
Evt baol 2.png
  • Engineering research 250-10000 Engineering research
  • Society research 350-10000 Society research
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 350-10000 Society research
  • Arcane technology.png 6-10 Minor artifacts
  • Feature.png Zron system location
No.png No.png
Zron
Evt shrouded planet.png
  • Arcane technology.png 1-5 Minor artifacts
  • Zro.png 2 Zro
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 350-10000 Society research
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 350-10000 Society research
  • Arcane technology.png 1-5 Minor artifacts
  • Society research 500-10000 Society research
  • Zro.png 5 Zro
  • Arcane technology.png 10-30 Minor artifacts
  • R zro crystal.png Psionic Archive relic

The Sentinels

The Sentinels is an Archaeology Site with slightly different mechanics. It can be discovered after a planet is colonized and adds an Archaeological Site blocker to the colony.

Chapter 1 Chapter 2 Chapter 3
Difficulty 2 2 3
Rewards Arcane technology.png 1-5 Minor Artifacts Arcane technology.png 1-5 Minor Artifacts Arcane technology.png 1-5 Minor Artifacts
Tile Blocker.png Archaeological Site blocker removed

When the site is completely excavated the empire will get the following choices:

  • If not Xenophobe.png Xenophobe or Fanatic Xenophobe.png Fanatic Xenophobe gain an Unity.png Unity from Jobs planet modifier and a permanent blocker.
  • If not Xenophobe.png Xenophobe or Fanatic Xenophobe.png Fanatic Xenophobe issue a special project to open the Sentinels. When the special project is complete the empire will have the option the hear the Sentinels or attack. Attacking will have the Sentinels invade the colony with 9 armies. Hearing them out will bring the option to either gain a permanent blocker and 9 defense armies or be hostile and have the Sentinels invade the colony with 9 armies. The invasion has an Army Strength of roughly 2400.
  • Issue a special project to destroy the Sentinels. When the special project is complete the will be invaded by 9 armies. If the armies are defeated the colony will gain the D mineral fields.png Sentinels planetary feature and empire will be offered to either gain 150 Influence.png Influence or issue a special project to see what the Sentinels were guarding. Finishing the special project will bring the following options:
    • Gain 300 Influence.png Influence and the Cheap Thrills planet modifier that gives -10% Mod pop consumer goods mult.png Pop Consumer Goods Upkeep and a +5% Mod pop happiness.png Happiness.
    • Gain the The Evermore planet modifier that gives +10% Research.png Research.
    • Gain access to the Replicate the Evermore special project.
    • If Militarist.png Militarist or Xenophobe.png Xenophobe gain 300 Influence.png Influence and access to Cheap Thrills planet modifier that gives +10% Militarist.png Militarist Ethics Attraction, +10% Xenophobe.png Xenophobe Ethics Attraction, -10% Mod pop consumer goods mult.png Consumer Goods Upkeep and +5% Mod pop happiness.png Happiness.

Excavation events

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

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 1.20
12 1.10
13 1.00
14 1.00

Footnotes

  1. If this technology has already been researched then gain Engineering research 1000-10000 engineering research else add this technology is a research option.
  2. If this technology has already been researched then gain Engineering research 1000-10000 engineering research else if this technology is a research option then gain this technology else gain 50% progress and add this technology as research option.
  3. Grants Tech genome mapping.png Genome Mapping, Tech frontier health.png Genetic Healthcare, Tech frontier health.png Cyto-Revitalization or 50% progress towards Tech gene tailoring.png Gene Tailoring if the prerequisite technology is researched. If all technologies are researched gain Society research 1000-10000 society research instead.
  4. If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then gain this technology else gain 50% progress and add this technology as research option.
  5. If Tech epigenetic triggers.png Epigenetic Triggers is already researched gain Tech terrestrial sculpting.png Terrestrial Sculpting instead. If both are already researched gain Society research 1000-10000 society research.
  6. If this technology has already been researched or Gestalt consciousness.png Gestalt Consciousness then gain Society research 1000-10000 society research else gain 20% progress and add it as a research option if not already
  7. 7.0 7.1 If the technology has already been researched then gain 2000-10000 research in the corresponding tech field Physics ResearchSociety researchEngineering research.
  8. Add this technology as research option with 30% progress.
  9. If this technology has already been researched then gain Engineering research 500-10000 engineering research else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  10. If all colonization technologies have been researched then gain Society research 500-10000 society research else if this technology is a research option then gain 50% progress else add the next colonization technology as research option with 25% progress.
  11. 11.0 11.1 11.2 11.3 If this technology has already been researched then gain Physics Research 1000-10000 physics research else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  12. 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  13. If this technology has already been researched then gain Volatile motes.png 100 volatile motes else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  14. If this technology has already been researched then gain Minerals.png 2000 minerals else if this technology is a research option then 50% progress else add this technology as research option with 10% progress.
  15. 15.0 15.1 15.2 15.3 15.4 If this technology has already been researched then gain Engineering research 1000-10000 engineering research else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  16. If this technology has already been researched then gain Society research 2000-10000 society research else if this technology is a research option then 25% progress else add this technology as research option with 10% progress.
  17. If this technology has already been researched then gain Engineering research 2000-10000 engineering research else gain this technology.
  18. If this technology has already been researched then gain Society research 2000-10000 society research else if this technology is a research option then gain 50% progress else add this technology as research option with 10% progress.
  19. If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then it gain 25% progress else add this technology as research option.
  20. If this technology has already been researched then gain Alloys.png 500 alloys else if this technology is a research option then gain 50% progress else add this technology as research option with 25% progress.
  21. If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then gain 50% progress else add this technology as research option.
  22. If this technology has already been researched then gain Physics Research 1000-10000 physics research else if this technology is a research option then gain 50% progress and Physics Research 500-10000 physics research else add this technology as research option and gain Physics Research 500-10000 physics research.
  23. 23.0 23.1 If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then gain 25% progress else add this technology as research option with 10% progress.
  24. If this technology has already been researched then gain Society research 1000-10000 society research else if this technology is a research option then gain 25% progress and gain Society research 500-10000 society research else add this technology as research option with 10% progress and gain Society research 500-10000 society research.
  25. If this technology has already been researched then gain Engineering research 1000-10000 engineering research else if this technology is a research option then gain 25% progress and gain Engineering research 500-10000 engineering research else add this technology as research option with 10% progress and gain Engineering research 500-10000 engineering research.
  26. If this technology is a research option then gain 80% progress else add this technology as research option with 50% progress. No additional bonus for already possessing the tech.
  27. If this technology has already been researched then gain Physics Research 1000-10000 physics research else if this technology is a research option then gain 80% progress else add this technology as research option with 25% progress.
  28. Also adds a Special Project to repair the corvette damage.