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	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

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	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	Leads To	Effects
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	Leads To	Effects
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	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, 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	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	Scholarship, Hydraulics	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