Civ/Sid Meier's Alpha Centauri/Tech Tree

Adaptive Doctrine

Prerequisite: Polymorphic Software, Doctrine: Flexibility
Technology: Advanced Military Algorithms
Armor: Pulse 3 Armor
Special Ability: Marine Detachment
Track and Level: Conquer 3

Adaptive Economics

Prerequisite: Progenitor Psych, Industrial Economics
Technology: Planetary Economics
Base Facility: Thermocline Transducer
Secret Project: The Planetary Energy Grid
Track and Level: Build 3

Advanced Ecological Engineering

Prerequisite: Fusion Power, Environmental Economics
Technology: Centauri Psi
Terraforming: Soil Enricher
Diplomatic Proposal: Melt Polar Caps
Special Ability: Super Former
Sea Mining Platforms produce +1 Minerals
Track and Level: Build 7

Advanced Military Algorithms

Prerequisite: Adaptive Doctrine (alien crossfire) Doctrine: Flexibility (original), Optical Computers
Technology: Pre-Sentient Algorithms, Retroviral Engineering
Base Facility: Punishment Sphere
Socio/economic model: Power
Terraforming: Bunker
Diplomatic Proposal: Repeal U.N. Charter, Reinstate U.N. Charter
Special Ability: AAA Tracking
Track and Level: Conquer 4

Advanced Spaceflight

Prerequisite: Orbital Spaceflight, Organic Superlubricant
Technology: Super Tensile Solids
Base Facility: Orbital Power Transmitter
Secret Project: The Living Refinery
Weapon: Plasma Shard
Diplomatic Proposal: Launch Solar Shade, Increase Solar Shade
Track and Level: Discover 8

Advanced Subatomic Theory

Prerequisite: High Energy Chemistry, Polymorphic Software
Technology: Applied Relativity, Silksteel Alloys
Base Facility: Skunkworks
Special Ability: Comm Jammer
Track and Level: Discover 3

Applied Gravitonics

Prerequisite: Graviton Theory, Digital Sentience
Technology: Controlled Singularity
Weapon: Graviton Gun
Track and Level: Explore 14

Applied Physics

Technology: Nonlinear Mathematics, High Energy Chemistry, Optical Computers
Weapon: Laser
Track and Level: Conquer 1

Applied Relativity

Prerequisite: Superconductor, Advanced Subatomic Theory
Technology: Unified Field Theory, Photon/Wave Mechanics
Secret Project: The Supercollider
Track and Level: Discover 5

Bio-Engineering

Prerequisite: Gene Splicing, Neural Grafting
Technology: Retroviral Engineering
Secret Project: The Longevity Vaccine
Special Ability: Clean Reactor
Increases defense against gene warfare.
Track and Level: Build 5

Bioadaptive Resonance

Prerequisite: Field Modulation, Centauri Empathy
Technology: Sentient Resonance
Unit: Spore Launcher
Weapon: Resonance Laser
Special Ability: Soporific Gas Pods
Track and Level: Conquer 4

Biogenetics

Technology: Secrets of the Human Brain, Gene Splicing
Base Facility: Recycling Tanks
Secret Project: The Human Genome Project
Increases defense against gene warfare.
Track and Level: Discover 1

Biomachinery

Prerequisite: Mind/Machine Interface, Retroviral Engineering
Technology: Homo Superior, N-Space Compression
Secret Project: The Cloning Vats
Increases defense against gene warfare.
Track and Level: Build 7

Centauri Ecology

Technology: Centauri Empathy, Ecological Engineering, Field Modulation
Secret Project: The Weather Paradigm
Unit: Formers
Weapon: Terraforming Unit
Increases Nutrient production in fungus.
Track and Level: Explore 1

Centauri Empathy

Prerequisite: Secrets of the Human Brain, Centauri Ecology
Technology: Centauri Meditation, Bioadaptive Resonance
Base Facility: Biology Lab
Secret Project: The Empath Guild
Socio/economic model: Green
Unit: Mind Worms
Special Ability: Empath Song
Allows roads to be built in fungus squares.
Track and Level: Explore 3

Centauri Genetics

Prerequisite: Centauri Meditation, Retroviral Engineering
Technology: Centauri Psi
Base Facility: Brood Pit
Secret Project: The Pholus Mutagen
Unit: Locusts of Chiron
Increases Mineral production in fungus.
Track and Level: Explore 7

Centauri Meditation

Prerequisite: Ecological Engineering, Centauri Empathy
Technology: Centauri Genetics
Base Facility: Centauri Preserve
Secret Project: The Xenoempathy Dome
Citizens: Empath
Unit: Isle of the Deep
Increases Energy production in fungus.
Track and Level: Explore 5

Centauri Psi

Prerequisite: Centauri Genetics, Advanced Ecological Engineering
Technology: The Will to Power, Secrets of Alpha Centauri, Sentient Resonance
Unit: Sealurk
Weapon: Psi Attack
Special Ability: Dissociative Wave
Increases Nutrient production in fungus.
Allows terrain improvements in fungus squares and eases fungus movement restrictions.
Track and Level: Explore 8

Controlled Singularity

Prerequisite: Singularity Mechanics, Applied Gravitonics
Technology: String Resonance, Transcendent Thought
Secret Project: The Singularity Inductor
Weapon: Singularity Laser
Track and Level: Conquer 15

Cyberethics

Prerequisite: Planetary Networks, Intellectual Integrity
Technology: Superstring Theory, Pre-Sentient Algorithms
Secret Project: The Planetary Datalinks
Socio/economic model: Knowledge
Track and Level: Build 4

Digital Sentience

Prerequisite: Industrial Nanorobotics, Mind/Machine Interface
Technology: Applied Gravitonics, Self-Aware Machines, Sentient Econometrics
Secret Project: The Network Backbone
Socio/economic model: Cybernetic
Improves Probe Team success rate.
Track and Level: Discover 10

Doctrine: Air Power

Prerequisite: Synthetic Fossil Fuels, Doctrine: Flexibility
Technology: Mind/Machine Interface, Orbital Spaceflight
Base Facility: Aerospace Complex
Terraforming: Airbase
Chassis: Needlejet
Special Ability: Air Superiority
Track and Level: Explore 5

Doctrine: Flexibility

Prerequisite: Doctrine: Mobility
Technology: Doctrine: Initiative, Doctrine: Air Power, Adaptive Doctrine
Base Facility: Pressure Dome
Unit: Transport Foil
Weapon: Troop Transport
Chassis: Foil
Track and Level: Explore 2

Doctrine: Initiative

Prerequisite: Doctrine: Flexibility, Industrial Automation
Technology: Nanometallurgy, Homo Superior
Base Facility: Naval Yard
Secret Project: The Maritime Control Center
Chassis: Cruiser
Special Ability: Amphibious Pods
Track and Level: Explore 4

Doctrine: Loyalty

Prerequisite: Doctrine: Mobility, Social Psych
Technology: Intellectual Integrity
Base Facility: Perimeter Defense
Secret Project: The Command Nexus
Socio/economic model: Police State
Track and Level: Conquer 2

Doctrine: Mobility

Technology: Doctrine: Flexibility, Doctrine: Loyalty
Base Facility: Command Center
Chassis: Speeder
Track and Level: Explore 1

Ecological Engineering

Prerequisite: Centauri Ecology, Gene Splicing
Technology: Centauri Meditation, Environmental Economics
Terraforming: Plant Fungus, Condenser, Echelon Mirror, Thermal Borehole, Aquifer
Allows a tile's Mineral production to exceed 2.
Track and Level: Explore 4

Environmental Economics

Prerequisite: Industrial Economics, Ecological Engineering
Technology: Advanced Ecological Engineering
Base Facility: Tree Farm
Terraforming: Raise Land, Lower Land
Increases commerce income from treaties and pacts.
Allows a tile's Energy production to exceed 2.
Track and Level: Build 5

Ethical Calculus

Prerequisite: Social Psych
Technology: Intellectual Integrity, Gene Splicing
Base Facility: Children's Creche
Socio/economic model: Democratic
Track and Level: Explore 2

Eudaimonia

Prerequisite: Sentient Econometrics, The Will to Power
Technology: Temporal Mechanics
Secret Project: The Telepathic Matrix
Socio/economic model: Eudaimonic
Armor: Psi Defense
Track and Level: Explore 12

Field Modulation

Prerequisite: Progenitor Psych, Centauri Ecology
Technology: Bioadaptive Resonance
Armor: Resonance 3 Armor
Track and Level: Conquer 2

Frictionless Surfaces

Prerequisite: Unified Field Theory, Industrial Nanorobotics
Technology: Quantum Power
Special Ability: Cloaking Device
Track and Level: Discover 10

Fusion Power

Prerequisite: Pre-Sentient Algorithms, Superconductor
Technology: Advanced Ecological Engineering, Organic Superlubricant
Base Facility: Fusion Lab
Citizens: Engineer
Reactor: Fusion Reactor
Track and Level: Discover 6

Gene Splicing

Prerequisite: Biogenetics, Ethical Calculus
Technology: Synthetic Fossil Fuels, Bio-Engineering, Ecological Engineering
Base Facility: Research Hospital
Increases defense against gene warfare.
Allows a tile's Nutrient production to exceed 2.
Track and Level: Build 3

Graviton Theory

Prerequisite: Quantum Machinery, Mind/Machine Interface
Technology: Applied Gravitonics
Chassis: Gravship
Special Ability: Antigrav Struts
Allows units with drop pods to perform orbital insertions to any location.
Track and Level: Explore 13

High Energy Chemistry

Prerequisite: Industrial Base, Applied Physics
Technology: Advanced Subatomic Theory, Synthetic Fossil Fuels
Armor: Plasma Steel Armor
Special Ability: Nerve Gas Pods
Track and Level: Conquer 2

Homo Superior

Prerequisite: Biomachinery, Doctrine: Initiative
Technology: The Will to Power
Base Facility: Nanohospital
Secret Project: The Universal Translator
Track and Level: Explore 8

Industrial Automation

Prerequisite: Industrial Economics, Planetary Networks
Technology: Silksteel Alloys, Doctrine: Initiative, Neural Grafting, Industrial Nanorobotics
Base Facility: Hab Complex
Secret Project: The Planetary Transit System
Socio/economic model: Wealth
Unit: Supply Crawler
Weapon: Supply Transport
Increases commerce income from treaties and pacts.
Track and Level: Build 3

Easily one of the two or three most important technologies in the game. This technology allows you to build the Supply Crawler, a staple of virtually all advanced strategies, and additionally allows Wealth, which may be desirable, and the construction of Hab Complexes, which you'll need for bigger bases, and the Planetary Transit System, which is useful if you can spare the time and resources to grab it. On top of all that, you get more commerce. Getting this tech before anybody else does can easily swing the game in your favor even if you are otherwise behind in every other respect — but you must take full advantage of it.

Industrial Base

Technology: Superconductor, High Energy Chemistry, Polymorphic Software, Industrial Economics
Secret Project: The Merchant Exchange
Armor: Synthmetal Armor
Track and Level: Build 1

Industrial Economics

Prerequisite: Industrial Base
Technology: Industrial Automation, Environmental Economics, Adaptive Economics
Base Facility: Energy Bank
Socio/economic model: Free Market
Increases commerce income from treaties and pacts.
Track and Level: Build 2

Industrial Nanorobotics

Prerequisite: Nanominiaturization, Industrial Automation
Technology: Frictionless Surfaces, Digital Sentience
Base Facility: Robotic Assembly Plant
Secret Project: The Nano Factory
Increases commerce income from treaties and pacts.
Track and Level: Build 9

Information Networks

Technology: Nonlinear Mathematics, Polymorphic Software, Planetary Networks
Base Facility: Network Node
Track and Level: Discover 1

Intellectual Integrity

Prerequisite: Ethical Calculus, Doctrine: Loyalty
Technology: Cyberethics, Planetary Economics
Secret Project: The Citizens' Defense Force
Special Ability: Non-Lethal Methods, High Morale
Track and Level: Explore 3

Matter Compression

Prerequisite: Nanometallurgy, Nanominiaturization
Technology: Super Tensile Solids
Armor: Neutronium Armor
Special Ability: Fuel Nanocells
Track and Level: Conquer 9

Matter Editation

Prerequisite: Self-Aware Machines, Super Tensile Solids
Technology: Matter Transmission
Base Facility: Nanoreplicator
Secret Project: Clinical Immortality
Armor: Antimatter Plate
Increases defense against gene warfare.

Matter Transmission

Prerequisite: Matter Editation, Secrets of Alpha Centauri
Technology: Temporal Mechanics
Base Facility: Psi Gate
Secret Project: The Bulk Matter Transmitter
Special Ability: Blink Displacer
Increases Mineral production in fungus.

Mind/Machine Interface

Prerequisite: Doctrine: Air Power, Neural Grafting
Technology: Graviton Theory, Digital Sentience, Biomachinery
Secret Project: The Cyborg Factory
Secret Project: The Cloudbase Academy
Citizens: Thinker
Chassis: Copter
Diplomatic Proposal: Unite Behind Me As Supreme Leader
Special Ability: Drop Pods
Improves Probe Team success rate.
Track and Level: Conquer 6

Monopole Magnets

Prerequisite: Superstring Theory, Silksteel Alloys
Technology: Unified Field Theory, Nanominiaturization
Terraforming: Mag Tube

N-Space Compression

Prerequisite: Orbital Spaceflight, Biomachinery
Technology: Self-Aware Machines
Base Facility: Flechette Defense System, Geosynchronous Survey Pod

Nanometallurgy

Prerequisite: Probability Mechanics, Doctrine: Initiative
Technology: Matter Compression, Quantum Machinery
Special Ability: Repair Bay

Nanominiaturization

Prerequisite: Monopole Magnets, Organic Superlubricant
Technology: Matter Compression, Industrial Nanorobotics
Chassis: Hovertank
Special Ability: Algorithmic Enhancement
Track and Level: Build 8

Neural Grafting

Prerequisite: Secrets of the Human Brain, Industrial Automation
Technology: Mind/Machine Interface, Bio-Engineering
Base Facility: Bioenhancement Center
Secret Project: The Neural Amplifier
Allows a unit to have two special abilities.

Nonlinear Mathematics

Prerequisite: Applied Physics, Information Networks
Technology: Superstring Theory
Weapon: Particle Impactor

Optical Computers

Prerequisite: Applied Physics, Polymorphic Software
Technology: Superconductor, Advanced Military Algorithms

Orbital Spaceflight

Prerequisite: Doctrine: Air Power, Pre-Sentient Algorithms
Technology: Advanced Spaceflight, N-Space Compression
Base Facility: Sky Hydroponics Lab
Weapon: Planet Buster, Conventional Payload
Chassis: Missile
Diplomatic Proposal: Salvage Unity Fusion Core
Track and Level: Discover 6

Organic Superlubricant

Prerequisite: Fusion Power, Synthetic Fossil Fuels
Technology: Nanominiaturization, Advanced Spaceflight
Weapon: Fusion Laser
Track and Level: Conquer 7

Photon/Wave Mechanics

Prerequisite: Applied Relativity, Silksteel Alloys
Technology: Probability Mechanics
Armor: Photon Wall

Planetary Economics

Prerequisite: Adaptive Economics, Intellectual Integrity in SMACAX, Environmental Economics and Intellectual Integrity in original
Technology: Quantum Power, Sentient Econometrics
Base Facility: Hybrid Forest, Subsea Trunkline
Secret Project: The Ascetic Virtues
Diplomatic Proposal: Global Trade Pact, Repeal Global Trade Pact
Increases commerce income from treaties and pacts.
Allows economic victory
Track and Level: Build 6

Planetary Networks

Prerequisite: Information Networks
Technology: Industrial Automation, Cyberethics
Base Facility: Hologram Theatre
Secret Project: The Virtual World
Socio/economic model: Planned
Citizens: Librarian
Unit: Probe Team
Weapon: Probe Team

Polymorphic Software

Prerequisite: Industrial Base, Information Networks
Technology: Advanced Subatomic Theory, Optical Computers, Adaptive Doctrine
Special Ability: Heavy Artillery
Improves Probe Team success rate.

Pre-Sentient Algorithms

Prerequisite: Advanced Military Algorithms, Cyberethics
Technology: Fusion Power, Probability Mechanics, Orbital Spaceflight
Base Facility: Covert Ops Center
Secret Project: The Hunter-Seeker Algorithm
Special Ability: Polymorphic Encryption
Improves Probe Team success rate.
Track and Level: Discover 5

Probability Mechanics

Prerequisite: Photon/Wave Mechanics, Pre-Sentient Algorithms
Technology: Nanometallurgy
Base Facility: Tachyon Field
Armor: Probability Sheath

Progenitor Psych

Technology: Field Modulation, Adaptive Economics
Base Facility: Aquafarm

Quantum Machinery

Prerequisite: Quantum Power, Nanometallurgy
Technology: Graviton Theory
Base Facility: Quantum Converter
Weapon: Quantum Laser

Quantum Power

Prerequisite: Frictionless Surfaces, Planetary Economics
Technology: Quantum Machinery
Base Facility: Quantum Lab
Reactor: Quantum Chamber

Retroviral Engineering

Prerequisite: Bio-Engineering, Advanced Military Algorithms
Technology: Biomachinery, Centauri Genetics
Base Facility: Genejack Factory
Increases defense against gene warfare.
Allows gene warfare to be committed by probe teams.
Track and Level: Conquer 6

Secrets of Alpha Centauri

Prerequisite: Centauri Psi, Sentient Econometrics
Technology: Matter Transmission, Secrets of the Manifolds
Base Facility: Temple of Planet
Citizens: Transcend
Increases Energy production in fungus.
Reveals the entire map when discovered.
Secrets: First faction to discover Secrets of Alpha Centauri gains a free technological advance.
Track and Level: Discover 12

Secrets of Creation

Prerequisite: Unified Field Theory, The Will to Power
Technology: Singularity Mechanics
Secrets: First faction to discover Secrets of Creation gains a free technological advance.
Track and Level: Discover 10

Secrets of the Human Brain

Prerequisite: Social Psych, Biogenetics
Technology: Neural Grafting, Centauri Empathy
Socio/economic model: Fundamentalist
Special Ability: Hypnotic Trance
Secrets: First faction to discover Secrets of the Human Brain gains a free technological advance.
Track and Level: Discover 2

Secrets of the Manifolds

Prerequisite: Sentient Resonance, Secrets of Alpha Centauri
Technology: Threshold of Transcendence, String Resonance
Secret Project: The Manifold Harmonics
Secrets: First faction to discover Secrets of the Manifolds gains a free technological advance.

Self-Aware Machines

Prerequisite: N-Space Compression (Advanced Spaceflight in original), Digital Sentience
Technology: Singularity Mechanics, Matter Editation
Base Facility: Nessus Mining Station, Orbital Defense Pod
Secret Project: The Self-Aware Colony
Secret Project: The Nethack Terminus
Improves Probe Team success rate.

Sentient Econometrics

Prerequisite: Planetary Economics, Digital Sentience
Technology: Eudaimonia, Secrets of Alpha Centauri
Base Facility: Paradise Garden
Increases commerce income from treaties and pacts.
Recreation Commons maintenance cost reduced from 1 to 0

Sentient Resonance

Prerequisite: Bioadaptive Resonance, Centauri Psi
Technology: Secrets of the Manifolds
Weapon: Resonance Bolt
Armor: Resonance 8 Armor

Silksteel Alloys

Prerequisite: Advanced Subatomic Theory, Industrial Automation
Technology: Monopole Magnets, Photon/Wave Mechanics
Armor: Silksteel Armor

Singularity Mechanics

Prerequisite: Secrets of Creation, Self-Aware Machines
Technology: Controlled Singularity
Base Facility: Subspace Generator
Reactor: Singularity Engine

Social Psych

Technology: Doctrine: Loyalty, Ethical Calculus, Secrets of the Human Brain
Base Facility: Recreation Commons
Track and Level: Build 1

String Resonance

Prerequisite: Secrets of the Manifolds, Controlled Singularity
Weapon: String Disruptor

Super Tensile Solids

Prerequisite: Matter Compression, Advanced Spaceflight
Technology: Matter Editation
Base Facility: Habitation Dome
Secret Project: The Space Elevator
Armor: Pulse 8 Armor

Superconductor

Prerequisite: Optical Computers, Industrial Base
Technology: Applied Relativity, Fusion Power
Weapon: Gatling Laser

Superstring Theory

Prerequisite: Nonlinear Mathematics, Cyberethics
Technology: Monopole Magnets
Weapon: Chaos Gun

Synthetic Fossil Fuels

Prerequisite: High Energy Chemistry, Gene Splicing
Technology: Doctrine: Air Power, Organic Superlubricant
Weapon: Missile Launcher
Special Ability: Fungicide Tanks

Temporal Mechanics

Prerequisite: Eudaimonia, Matter Transmission
Technology: Threshold of Transcendence
Armor: Stasis Generator
Increases Energy production in fungus.

The Will to Power

Prerequisite: Homo Superior, Centauri Psi
Technology: Eudaimonia, Secrets of Creation
Secret Project: The Dream Twister
Socio/economic model: Thought Control
Track and Level: Explore 9

Threshold of Transcendence

Prerequisite: Secrets of the Manifolds (Secrets of Creation in original), Temporal Mechanics
Technology: Transcendent Thought
Secret Project: The Voice of Planet
Secret Project: The Ascent to Transcendence
Increases Mineral production in fungus.

Transcendent Thought

Prerequisite: Threshold of Transcendence, Controlled Singularity

Transcendent Thought serves the same function as the 'Future Technology' techs in the Civilization series: Bonus Points at the end of the game for each 'level' of Transcendent Thought researched.

Track and Level: Discover 16

Unified Field Theory

Prerequisite: Monopole Magnets, Applied Relativity
Technology: Frictionless Surfaces, Secrets of Creation
Secret Project: The Theory of Everything
Weapon: Tachyon Bolt