Tech Tree

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.

All available techs are placed in a draw pile. 4 techs (5 if you built the Oracle) will be randomly selected and presented to the player to choose from. 1 can be selected, the others will be placed into the discard pile (boosts or free units will be discarded). If your leader is a scholar you can do a 1-time redraw of available techs from the draw pile (this will not cause boosts or free unit cards to be discarded).

After a tech is completed, any new available techs are added to the draw pile, and a new set of techs will be selected from the draw pile for the player to choose from. Techs will be moved from the discard pile to the draw pile when the draw pile is empty.

Tier 1 (100 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
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

Tier 2 (150 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
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	Sovereignty (with Rhetoric) Monasticism Border Boost			Ambassador Centralization / Vassalage
Rhetoric	Administration	Metaphysics Sovereignty (with Aristocracy)			Forum I Epics / Exploration Dualism

Border Boost

(All Cities) +6 Border Tiles

Food Boost

+200

Tier 3 (250 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
Navigation	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

Orders Boost

+20

Training Boost

+800

Tier 4 (400 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
Coinage	Navigation	Lateen Sail (with Cartography) Money Boost		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

Money Boost

+200

Tier 5 (600 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
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 Free Turreted Elephant Goods Boost	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 , +400 , +400

Tier 6 (1000 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Improvements Unlocked	Other Unlocks
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	Scholarship Hydraulics	Chain Drive Free Cataphract Archer Free Crossbowman	Crossbowman

Happiness Boost

(All Cities) - +1 Happiness Level

Tier 7 (1500 Science)

Technology	Prerequisites	Tech Cards Unlocked	Units Unlocked	Other Unlocks
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	Other Unlocks
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