Tech Tree

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The tech tree

Techs (short for "technologies") are empire upgrades that cost science and provide various benefits and make additional techs and some laws and events available.

Tier 1 (100 Science)

Technology Prerequisites Leads To Effects
Ironworking
None Husbandry, Labor Force, Steel (with Military Drill) Warrior
Stonecutting
None Drama, Polis, Stone Boost Fort, Quarry
Trapping
None Military Drill Slinger, Camp
Divination
None Aristocracy Shrine
Administration
None Rhetoric, Free Worker Treasury, Granary
Stone Boost
+200 Stone.png

Tier 2 (150 Science)

Technology Prerequisites Leads To Effects
Labor Force
Ironworking Navigation, Phalanx Roads, Slavery / Freedom, Revelation
Husbandry
Ironworking Spoked Wheel, Food Boost Pasture
Drama
Stonecutting Portcullis (with Spoked Wheel), Free Settler Odeon, Gnosticism
Polis
Stonecutting Forestry Hamlet, Ask To Declare War
Military Drill
Trapping Composite Bow, Steel (with Ironworking) Barracks, Rally Troops
Aristocracy
Divination Border Boost, Sovereignty (with Rhetoric), Monasticism Ambassador, Centralization / Vassalage
Rhetoric
Administration Metaphysics, Sovereignty (with Aristocracy) Forum I, Epics / Exploration, Dualism
Border Boost
All Cities +6 Border Tiles
Food Boost
+200 Food.png

Tier 3 (250 Science)

Technology Prerequisites Leads To Effects
Labor Force Coinage, Cartography (with Metaphysics), Free Bireme Bireme, Colonies / Serfdom, Can automate scouts
Phalanx
Labor Force Citizenship, Battle Line (with Steel), Free Hoplite, Orders Boost Spearman
Spoked Wheel
Husbandry Portcullis (with Drama), Stirrups (with Citizenship), Free Chariot Chariot, Chancellor
Forestry
Polis Land Consolidation, Free Court Scholar, Free Heavy Chariot, Free Light Chariot Lumbermill, Enlightenment
Steel
Ironworking, Military Drill Battle Line (with Phalanx), Free African Elephant, Free Hastatus, Training Boost Axeman
Sovereignty
Aristocracy, Rhetoric Machinery, Civics Boost Tyranny / Constitution
Metaphysics
Rhetoric Cartography (with Navigation) Convert to State Religion, High Synod, Archive I, Redemption,
Civics Boost
+800 Civics.png
Orders Boost
+20 Orders.png
Training Boost
+800 Training.png

Tier 4 (400 Science)

Technology Prerequisites Leads To Effects
Coinage
Navigation Money Boost, Lateen Sail (with Cartography) Market, Pacify City, Automate Workers
Citizenship
Phalanx Scholarship, Stirrups (with Spoked Wheell), Free Court Minister Courthouse, Divine Rule / Legal Code
Portcullis
Drama, Spoked Wheel Architecture, Free Battering Ram, Free Maceman Spymaster, Moat
Land Consolidation
Forestry Cohorts (with Battle Line), Manor (with Composite Bow), Free Camel Archer, Free War Elephant Camel Archer, War Elephant, Grove
Composite Bow
Military Drill Manor (with Land Consolidation), Free Akkadian Archer, Free Archer, Free Palton Cavalry Archer, Range
Monasticism
Aristocracy Doctrine Monastery, Monotheism / Polytheism
Machinery
Sovereignty Hydraulics, Free Onager Onager

Tier 5 (600 Science)

Technology Prerequisites Leads To Effects
Scholarship
Citizenship Jurisprudence, Windlass (with Hydraulics), Free Court Scholar Library, Expose Agent Network, Move Agent Network
Stirrups
Citizenship, Spoked Wheel Martial Code, Free Horse Archer, Free Horseman, Free Kushite Cavalry, Free Three Man Chariot Horse Archer, Horseman
Architecture
Portcullis Vaulting, Free Siege Tower Bath, Philosophy / Engineering
Manor
Composite Bow, Land Consolidation Bodkin Arrow, Goods Boost, Free Turreted Elephant Conscript, Professional Army / Volunteers
Battle Line
Phalanx, Steel Barding (with Martial Code), Cohorts (with Land Consolidation), Free Court Soldier Maceman
Doctrine
Monasticism Temple, Tolerance / Orthodoxy
Hydraulics
Machinery Windlass (with Scholarship), Ballistics (with Cartography), Free Ballista Ballista, Mill
Cartography
Metaphysics, Navigation Lateen Sail (with Coinage), Ballistics (with Hydraulics) Trireme, Harbor, Steal Research
Goods Boost
+400 Iron.png, +400 Stone.png, +400 Wood.png

Tier 6 (1000 Science)

Technology Prerequisites Leads To Effects
Lateen Sail
Cartography, Coinage Fiscal Policy (with Jurisprudence), Free Dromon Dromon, Autarky / Trade League
Jurisprudence
Scholarship Fiscal Policy (with Lateen Sail), Free Court Minister Insurrection, Guilds / Elites
Martial Code
Stirrups Barding (with Battle Line) Towers, Pilgrimage / Holy War
Vaulting
Architecture Happiness Boost Cathedral, Iconography / Calligraphy
Bodkin Arrow
Manor Infantry Square, Free Longbowman, Free Cimmerian Archer Longbowman
Windlass
Torsion Chain Drive, Free Cataphract Archer, Free Crossbowman Crossbowman
Happiness Boost
(All Cities) - +1 Happiness Level

Tier 7 (1500 Science)

Technology Prerequisites Leads To Effects
Fiscal Policy
Lateen Sail, Jurisprudence Economic Reform, Free Court Merchant Coin Debasement / Monetary Reform
Barding
Steel, Martial Code Military Prestige (with Infantry Square and Cohorts) Cataphract
Infantry Square
Bodkin Arrow Military Prestige (with Barding and Cohorts), Free Court Soldier, Free Phalangite Pikeman
Cohorts
Land Consolidation, Battle Line Military Prestige (with Barding and Infantry Square), Free Legionary Swordsman
Chain Drive
Windlass Industrial Progress (with Ballistics) Polybolos
Ballistics
Hydraulics, Cartography Industrial Progress (with Chain Drive) Mangonel

Tier 8 (2000 Science)

Technology Prerequisites Leads To Effects
Economic Reform
Fiscal Policy Court Merchant, +1 Victory Point
Military Prestige
Barding, Infantry Square, Cohorts Court Soldier, +1 Victory Point
Industrial Progress
Chain Drive, Ballistics Court Minister, +1 Victory Point

All Tier 8 technologies can be researched multiple times