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[[File:TechTree.jpg|right|thumb|400px|The tech tree]]
[[File:TechTree.jpg|right|thumb|400px|The tech tree]]


'''Techs''' (short for "technologies") are empire upgrades that cost [[Resources|science]] and provide various benefits and make additional techs and some [[laws]] and [[events]] available.
'''Technologies''' ("Techs") are empire upgrades that cost {{icon|science}} [[Science]] and provide various benefits. Each Technology unlocks additional Technologies when researched.


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).
All available Techs are placed in a draw pile and shuffled. Whenever a Tech is completed, Four Techs (five, with [[Wonders#The Oracle|The Oracle]], and three, at the beginning of the game) will be drawn from this shuffled deck and presented to the player to choose from. One can be selected to research, at which point the [[Nations|Nation's]] Science output will be dedicated to paying the Tech's cost until it is fully researched. Techs not chosen will be put in a discard pile which is shuffled once the deck is empty to form a new deck. [[#Bonus Cards|Bonus Cards]] not chosen will be permanently removed from the game. [[Archetype#Scholar|Scholar]] [[Leaders]] can redraw Techs once each turn, discarding all currently offered Techs (permanently, for Bonus Cards) to draw a new hand.


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.
After a tech is completed, any newly available techs are added to the discard pile and a new set of techs will be drawn from the draw pile for the player to choose from.  


== Bonus Cards ==
Some Technologies unlock Bonus Cards, which are added to the discard pile just like the regular Techs unlocked by researching that Tech. When researched, these Bonus Cards give a one-time bonus, such as 200 {{icon|stone}}, and do not unlock further Techs. If Bonus Cards are not researched the first time they are offered, they are trashed, or permanently removed from the game. Because of this, it is sometimes useful to time Technology research so that Bonus Cards are unlocked when they will be useful, rather than allowing them to be trashed because they appeared when not needed.


= Tier 1 (100 Science) =
=== List of Bonus Cards ===
{| class="wikitable"
|+
|-
! Name !! Unlocked By !! Cost !! Bonus
|-
| Stone Boost
|| Stonecutting
|style="text-align:center;"| 40 {{icon|science}}
|style="text-align:center;"| 200 {{icon|stone}}
|-
| Food Boost
|| Husbandry
|style="text-align:center;"| 60 {{icon|science}}
|style="text-align:center;"| 200 {{icon|food}}
|-
| Free Settler
|| Drama
|style="text-align:center;"| 60 {{icon|science}}
|style="text-align:center;"| Gain [[Settler]] in [[City#Capital|Capital]]
|-
| Border Boost
|| Aristocracy
|style="text-align:center;"| 60 {{icon|science}}
|style="text-align:center;"| [All Cities] +6 [[City#Borders|Border Tiles]]
|-
| Free Trireme
|| Navigation
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Gain [[Trireme]] in Capital
|-
| Orders Boost
|| Phalanx
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| 20 {{icon|orders}}
|-
| Free Exotic Fur
|| Spoked Wheel
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Add [[Luxuries#Exotic Fur|Exotic Fur]]
|-
| Free Archer
|| Forestry
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Gain [[Archer]] in Capital
|-
| Free Ebony
|| Forestry
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Add [[Luxuries#Ebony|Ebony]]
|-
| Free Bireme
|| Steel
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Gain [[Bireme]] in Capital
|-
| Training Boost
|| Steel
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| 800 {{icon|training}}
|-
| Free War Elephant
|| Steel
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Gain [[War Elephant]] in Capital
|-
| Civics Boost
|| Sovereignty
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| 800 {{icon|civics}}
|-
| Free Court Scholar
|| Metaphysics
|style="text-align:center;"| 100 {{icon|science}}
|style="text-align:center;"| Gain Court Scholar
|-
| Money Boost
|| Coinage
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| 4,000 {{icon|money}}
|-
| Free Silk
|| Coinage
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Add [[Luxuries#Silk|Silk]]
|-
| Free Court Minister
|| Citizenship
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain Court Minister
|-
| Free Maceman
|| Portcullis
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Maceman]] in Capital
|-
| Free Onager
|| Portcullis
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Onager]] in Capital
|-
| Free Perfume
|| Architecture
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Add [[Luxuries#Perfume|Perfume]]
|-
| Free Horseman
|| Land Consolidation
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Horseman]] in Capital
|-
| Free Horse Archer
|| Land Consolidation
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Horse Archer]] in Capital
|-
| Free Ballista
|| Composite Bow
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Ballista]] in Capital
|-
| Free Camel Archer
|| Monasticism
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[Camel Archer]] in Capital
|-
| Free War Elephant
|| Machinery
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| Gain [[War Elephant]] in Capital
|-
| Goods Boost
|| Machinery
|style="text-align:center;"| 200 {{icon|science}}
|style="text-align:center;"| 400 {{icon|iron}}, 400 {{icon|stone}}, 400 {{icon|wood}}
|-
| Free Court Scholar
|| Scholarship
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| Gain [[Court Scholar]]
|-
| Happiness Boost
|| Vaulting
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| [All Cities] +1 [[City#Happiness|Happiness Level]]
|-
| Free Longbowman
|| Manor
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| Gain [[Longbowman]] (x2) in Capital
|-
| Free Court Soldier
|| Battle Line
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| Gain [[Court Soldier]]
|-
| Free Crossbowman
|| Hydraulics
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| Gain [[Crossbowman]] (x2) in Capital
|-
| Free Dromon
|| Cartography
|style="text-align:center;"| 400 {{icon|science}}
|style="text-align:center;"| Gain [[Dromon]] (x2) in Capital
|-
| Free Porcelain
|| Lateen Sail
|style="text-align:center;"| 600 {{icon|science}}
|style="text-align:center;"| Add [[Luxuries#Porcelain|Porcelain]]
|-
| Free Court Minister
|| Jurisprudence
|style="text-align:center;"| 600 {{icon|science}}
|style="text-align:center;"| Gain Court Minister
|-
| Free Court Merchant
|| Fiscal Policy
|style="text-align:center;"| 1000 {{icon|science}}
|style="text-align:center;"| Gain Court Merchant
|-
| Free Court Soldier
|| Infantry Square
|style="text-align:center;"| 1000 {{icon|science}}
|style="text-align:center;"| Gain Court Soldier
|-
| Free Court Merchant
|| Chain Drive
|style="text-align:center;"| 1000 {{icon|science}}
|style="text-align:center;"| Gain Court Merchant
|}
 
== List of Technologies ==
Technologies are listed below, sorted by tier. Technologies of the same tier appear in the same column of the Tech tree, and have the same cost, but are otherwise not necessarily related.


{| class="wikitable sortable"
=== Tier 1 (80 Science) ===
 
{| class="wikitable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Ironworking">Ironworking</div> || None || [[#Husbandry|Husbandry]], [[#Labor Force|Labor Force]], [[#Steel|Steel]] (with [[#Military Drill|Military Drill]]) || Warrior
| <div id="Ironworking">Ironworking</div>||None||[[#Husbandry|Husbandry]]<br>[[#Labor Force|Labor Force]]<br>[[#Steel|Steel]] (with [[#Military Drill|Military Drill]])||Warrior|| ||
|-
|-
| <div id="Stonecutting">Stonecutting</div> || None || [[#Drama|Drama]], [[#Polis|Polis]], Stone Boost || Fort, Quarry
| <div id="Stonecutting">Stonecutting</div>||None||[[#Drama|Drama]]<br>[[#Polis|Polis]]<br>Stone Boost|| ||Fort<br>Quarry||
|-
|-
| <div id="Trapping">Trapping</div> || None || [[#Military Drill|Military Drill]] || Slinger, Camp
| <div id="Trapping">Trapping</div>||None||[[#Military Drill|Military Drill]]||Slinger||Camp||
|-
|-
| <div id="Divination">Divination</div> || None || [[#Aristocracy|Aristocracy]] || Shrine
| <div id="Divination">Divination</div>||None||[[#Aristocracy|Aristocracy]]|| ||Shrine||
|-
|-
| <div id="Administration">Administration</div> || None || [[#Rhetoric|Rhetoric]], Free Worker || Treasury, Granary
| <div id="Administration">Administration</div>||None||[[#Rhetoric|Rhetoric]]<br>[[Units#Worker|Free Worker]]|| ||Treasury<br>Granary||
|}
|}


;Stone Boost
=== Tier 2 (120 Science) ===
:+200 {{icon|stone}}


= Tier 2 (150 Science) =
{| class="wikitable"
 
{| class="wikitable sortable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Labor Force">Labor Force</div> || [[#Ironworking|Ironworking]] || [[#Navigation|Navigation]], [[#Phalanx|Phalanx]] || Roads, Slavery / Freedom, Revelation
| <div id="Labor Force">Labor Force</div>||[[#Ironworking|Ironworking]]||[[#Navigation|Navigation]]<br>[[#Phalanx|Phalanx]]|| || ||Roads<br>Slavery / Freedom<br>Revelation
|-
|-
| <div id="Husbandry">Husbandry</div> || [[#Ironworking|Ironworking]] || [[#Spoked Wheel|Spoked Wheel]], Food Boost || Pasture
| <div id="Husbandry">Husbandry</div>||[[#Ironworking|Ironworking]]||[[#Spoked Wheel|Spoked Wheel]]<br>Food Boost|| ||Pasture||
|-
|-
| <div id="Drama">Drama</div> || [[#Stonecutting|Stonecutting]] || [[#Portcullis|Portcullis]] (with [[#Spoked Wheel|Spoked Wheel]]), Free Settler || Odeon, Gnosticism
| <div id="Drama">Drama</div>||[[#Stonecutting|Stonecutting]]||[[#Portcullis|Portcullis]] (with [[#Spoked Wheel|Spoked Wheel]])<br>[[Units#Settler|Free Settler]]|| ||Odeon||Gnosticism
|-
|-
| <div id="Polis">Polis</div> || [[#Stonecutting|Stonecutting]] || [[#Forestry|Forestry]] || Hamlet, Ask To Declare War
| <div id="Polis">Polis</div>||[[#Stonecutting|Stonecutting]]||[[#Forestry|Forestry]]|| ||Hamlet||Ask To Declare War
|-
|-
| <div id="Military Drill">Military Drill</div> || [[#Trapping|Trapping]] || [[#Composite Bow|Composite Bow]], [[#Steel|Steel]] (with [[#Ironworking|Ironworking]]) || Barracks, Rally Troops
| <div id="Military Drill">Military Drill</div>||[[#Trapping|Trapping]]||[[#Composite Bow|Composite Bow]]<br>[[#Steel|Steel]] (with [[#Ironworking|Ironworking]])|| ||Barracks||Rally Troops
|-
|-
| <div id="Aristocracy">Aristocracy</div> || [[#Divination|Divination]] || [[#Sovereignty|Sovereignty]] (with [[#Rhetoric|Rhetoric]]), [[#Monasticism|Monasticism]], Border Boost || Ambassador, Centralization / Vassalage
| <div id="Aristocracy">Aristocracy</div>||[[#Divination|Divination]]||[[#Sovereignty|Sovereignty]] (with [[#Rhetoric|Rhetoric]])<br>[[#Monasticism|Monasticism]]<br>Border Boost|| || ||Ambassador<br>Centralization / Vassalage
|-
|-
| <div id="Rhetoric">Rhetoric</div> || [[#Administration|Administration]] || [[#Metaphysics|Metaphysics]], [[#Sovereignty|Sovereignty]] (with [[#Aristocracy|Aristocracy]]) || Forum I, Epics / Exploration, Dualism
| <div id="Rhetoric">Rhetoric</div>||[[#Administration|Administration]]||[[#Metaphysics|Metaphysics]]<br>[[#Sovereignty|Sovereignty]] (with [[#Aristocracy|Aristocracy]])|| || ||Forum I<br>Epics / Exploration<br>Dualism
|}
|}


;Border Boost
=== Tier 3 (200 Science) ===
:(All Cities) +6 Border Tiles
;Food Boost
:+200 {{icon|food}}


= Tier 3 (250 Science) =
{| class="wikitable"
 
{| class="wikitable sortable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Navigation">Navigation</div> || [[#Labor Force|Labor Force]] || [[#Coinage|Coinage]], [[#Cartography|Cartography]] (with [[#Metaphysics|Metaphysics]]), Free Bireme || Bireme, Colonies / Serfdom, Can automate scouts
| <div id="Navigation">Navigation</div>||[[#Labor Force|Labor Force]]||[[#Coinage|Coinage]]<br>[[#Cartography|Cartography]] (with [[#Metaphysics|Metaphysics]])<br>[[Units#Bireme|Free Bireme]]||Bireme|| ||Colonies / Serfdom<br>Can automate scouts
|-
|-
| <div id="Phalanx">Phalanx</div> || [[#Labor Force|Labor Force]] || [[#Citizenship|Citizenship]], [[#Battle Line|Battle Line]] (with [[#Steel|Steel]]), Free Hoplite, Orders Boost || Spearman
| <div id="Phalanx">Phalanx</div>||[[#Labor Force|Labor Force]]||[[#Citizenship|Citizenship]]<br>[[#Battle Line|Battle Line]] (with [[#Steel|Steel]])<br>[[Units#Hoplite|Free Hoplite]]<br>Orders Boost||Spearman|| ||
|-
|-
| <div id="Spoked Wheel">Spoked Wheel</div> || [[#Husbandry|Husbandry]] || [[#Portcullis|Portcullis]] (with [[#Drama|Drama]]), [[#Stirrups|Stirrups]] (with [[#Citizenship|Citizenship]]), Free Chariot || Chariot, Chancellor
| <div id="Spoked Wheel">Spoked Wheel</div>||[[#Husbandry|Husbandry]]||[[#Portcullis|Portcullis]] (with [[#Drama|Drama]])<br>[[#Stirrups|Stirrups]] (with [[#Citizenship|Citizenship]])<br>[[Units#Chariot|Free Chariot]]||Chariot|| ||Chancellor
|-
|-
| <div id="Forestry">Forestry</div> || [[#Polis|Polis]] || [[#Land Consolidation|Land Consolidation]], Free Court Scholar, Free Heavy Chariot, Free Light Chariot || Lumbermill, Enlightenment
| <div id="Forestry">Forestry</div>||[[#Polis|Polis]]||[[#Land Consolidation|Land Consolidation]]<br>Free Court Scholar<br>[[Units#Heavy Chariot|Free Heavy Chariot]]<br>[[Units#Light Chariot|Free Light Chariot]]|| ||Lumbermill||Enlightenment
|-
|-
| <div id="Steel">Steel</div> || [[#Ironworking|Ironworking]], [[#Military Drill|Military Drill]] || [[#Battle Line|Battle Line]] (with [[#Phalanx|Phalanx]]), Free African Elephant, Free Hastatus, Training Boost || Axeman
| <div id="Steel">Steel</div>||[[#Ironworking|Ironworking]]<br>[[#Military Drill|Military Drill]]||[[#Battle Line|Battle Line]] (with [[#Phalanx|Phalanx]])<br>[[Units#African Elephant|Free African Elephant]]<br>[[Units#Hastatus|Free Hastatus]]<br>Training Boost||Axeman|| ||
|-
|-
| <div id="Sovereignty">Sovereignty</div> || [[#Aristocracy|Aristocracy]], [[#Rhetoric|Rhetoric]] || [[#Machinery|Machinery]], Civics Boost || Tyranny / Constitution
| <div id="Sovereignty">Sovereignty</div>||[[#Aristocracy|Aristocracy]]<br>[[#Rhetoric|Rhetoric]]||[[#Machinery|Machinery]]<br>Civics Boost|| || ||Tyranny / Constitution
|-
|-
| <div id="Metaphysics">Metaphysics</div> || [[#Rhetoric|Rhetoric]] || [[#Cartography|Cartography]] (with [[#Navigation|Navigation]]) || Convert to State Religion, High Synod, Archive I, Redemption,
| <div id="Metaphysics">Metaphysics</div>||[[#Rhetoric|Rhetoric]]||[[#Cartography|Cartography]] (with [[#Navigation|Navigation]])|| || ||Convert to State Religion<br>High Synod<br>Archive I<br>Redemption
|}
|}


;Civics Boost
=== Tier 4 (400 Science) ===
:+800 {{icon|civics}}
;Orders Boost
:+20 {{icon|orders}}
;Training Boost:
:+800 {{icon|training}}


= Tier 4 (400 Science) =
{| class="wikitable"
 
{| class="wikitable sortable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Coinage">Coinage</div> || [[#Navigation|Navigation]] || [[#Lateen Sail|Lateen Sail]] (with [[#Cartography|Cartography]]), Money Boost || Market, Pacify City, Automate Workers
| <div id="Coinage">Coinage</div>||[[#Navigation|Navigation]]||[[#Lateen Sail|Lateen Sail]] (with [[#Cartography|Cartography]])<br>Money Boost|| ||Market||Pacify City<br>Automate Workers
|-
|-
| <div id="Citizenship">Citizenship</div> || [[#Phalanx|Phalanx]] || [[#Scholarship|Scholarship]], [[#Stirrups|Stirrups]] (with [[#Spoked Wheel|Spoked Wheel]]l), Free Court Minister || Courthouse, Divine Rule / Legal Code
| <div id="Citizenship">Citizenship</div>||[[#Phalanx|Phalanx]]||[[#Scholarship|Scholarship]]<br>[[#Stirrups|Stirrups]] (with [[#Spoked Wheel|Spoked Wheel]]l)<br>Free Court Minister|| ||Courthouse||Divine Rule / Legal Code
|-
|-
| <div id="Portcullis">Portcullis</div> || [[#Drama|Drama]], [[#Spoked Wheel|Spoked Wheel]] || [[#Architecture|Architecture]], Free Battering Ram, Free Maceman || Spymaster, Moat  
| <div id="Portcullis">Portcullis</div>||[[#Drama|Drama]]<br>[[#Spoked Wheel|Spoked Wheel]]||[[#Architecture|Architecture]]<br>[[Units#Battering Ram|Free Battering Ram]]<br>[[Units#Maceman|Free Maceman]]|| || ||Spymaster<br>Moat  
|-
|-
| <div id="Land Consolidation">Land Consolidation</div> || [[#Forestry|Forestry]] || [[#Cohorts|Cohorts]] (with [[#Battle Line|Battle Line]]), [[#Manor|Manor]] (with [[#Composite Bow|Composite Bow]]), Free Camel Archer, Free War Elephant || Camel Archer, War Elephant, Grove
| <div id="Land Consolidation">Land Consolidation</div>||[[#Forestry|Forestry]]||[[#Cohorts|Cohorts]] (with [[#Battle Line|Battle Line]])<br>[[#Manor|Manor]] (with [[#Composite Bow|Composite Bow]])<br>[[Units#Camel Archer|Free Camel Archer]]<br>[[Units#War Elephant|Free War Elephant]]||Camel Archer<br>War Elephant||Grove||
|-
|-
| <div id="Composite Bow">Composite Bow</div> || [[#Military Drill|Military Drill]] || [[#Manor|Manor]] (with [[#Land Consolidation|Land Consolidation]]), Free Akkadian Archer, Free Archer, Free Palton Cavalry || Archer, Range
| <div id="Composite Bow">Composite Bow</div>||[[#Military Drill|Military Drill]]||[[#Manor|Manor]] (with [[#Land Consolidation|Land Consolidation]])<br>[[Units#Akkadian Archer|Free Akkadian Archer]]<br>[[Units#Archer|Free Archer]]<br>[[Units#Palton Cavalry|Free Palton Cavalry]]||Archer||Range||
|-
|-
| <div id="Monasticism">Monasticism</div> || [[#Aristocracy|Aristocracy]] || [[#Doctrine|Doctrine]] || Monastery, Monotheism / Polytheism
| <div id="Monasticism">Monasticism</div>||[[#Aristocracy|Aristocracy]]||[[#Doctrine|Doctrine]]|| ||Monastery||Monotheism / Polytheism
|-
|-
| <div id="Machinery">Machinery</div> || [[#Sovereignty|Sovereignty]] || [[#Hydraulics|Hydraulics]], Free Onager || Onager
| <div id="Machinery">Machinery</div>||[[#Sovereignty|Sovereignty]]||[[#Hydraulics|Hydraulics]]<br>[[Units#Onager|Free Onager]]||Onager|| ||
|}
|}


;Money Boost
=== Tier 5 (600 Science) ===
:+200 {{icon|money}}


= Tier 5 (600 Science) =
{| class="wikitable"
 
{| class="wikitable sortable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Scholarship">Scholarship</div> || [[#Citizenship|Citizenship]] || [[#Jurisprudence|Jurisprudence]], [[#Windlass|Windlass]] (with [[#Hydraulics|Hydraulics]]), Free Court Scholar || Library, Expose Agent Network, Move Agent Network
| <div id="Scholarship">Scholarship</div>||[[#Citizenship|Citizenship]]||[[#Jurisprudence|Jurisprudence]]<br>[[#Windlass|Windlass]] (with [[#Hydraulics|Hydraulics]])<br>Free Court Scholar|| ||Library||Expose Agent Network<br>Move Agent Network
|-
|-
| <div id="Stirrups">Stirrups</div> || [[#Citizenship|Citizenship]], [[#Spoked Wheel|Spoked Wheel]] || Martial Code, Free Horse Archer, Free Horseman, Free Kushite Cavalry, Free Three Man Chariot || Horse Archer, Horseman
| <div id="Stirrups">Stirrups</div>||[[#Citizenship|Citizenship]]<br>[[#Spoked Wheel|Spoked Wheel]]||[[#Martial Code|Martial Code]]<br>[[Units#Horse Archer|Free Horse Archer]]<br>[[Units#Horseman|Free Horseman]]<br>[[Units#Kushite Cavalry|Free Kushite Cavalry]]<br>[[Units#Three Man Chariot|Free Three Man Chariot]]||Horse Archer<br>Horseman|| ||
|-
|-
| <div id="Architecture">Architecture</div> || [[#Portcullis|Portcullis]] || [[#Vaulting|Vaulting]], Free Siege Tower || Bath, Philosophy / Engineering
| <div id="Architecture">Architecture</div>||[[#Portcullis|Portcullis]]||[[#Vaulting|Vaulting]]<br>[[Units#Siege Tower|Free Siege Tower]]|| ||Bath||Philosophy / Engineering
|-
|-
| <div id="Manor">Manor</div> || [[#Composite Bow|Composite Bow]], [[#Land Consolidation|Land Consolidation]] || [[#Bodkin Arrow|Bodkin Arrow]], Free Turreted Elephant, Goods Boost || Conscript, Professional Army / Volunteers
| <div id="Manor">Manor</div>||[[#Composite Bow|Composite Bow]]<br>[[#Land Consolidation|Land Consolidation]]||[[#Bodkin Arrow|Bodkin Arrow]]<br>[[Units#Turreted Elephant|Free Turreted Elephant]]<br>Goods Boost||Conscript|| ||Professional Army / Volunteers
|-
|-
| <div id="Battle Line">Battle Line</div> || [[#Phalanx|Phalanx]], [[#Steel|Steel]] || [[#Barding|Barding]] (with [[#Martial Code|Martial Code]]), [[#Cohorts|Cohorts]] (with [[#Land Consolidation|Land Consolidation]]), Free Court Soldier || Maceman
| <div id="Battle Line">Battle Line</div>||[[#Phalanx|Phalanx]]<br>[[#Steel|Steel]]||[[#Barding|Barding]] (with [[#Martial Code|Martial Code]])<br>[[#Cohorts|Cohorts]] (with [[#Land Consolidation|Land Consolidation]])<br>Free Court Soldier||Maceman|| ||
|-
|-
| <div id="Doctrine">Doctrine</div> || [[#Monasticism|Monasticism]] || || Temple, Tolerance / Orthodoxy
| <div id="Doctrine">Doctrine</div>||[[#Monasticism|Monasticism]]|| || ||Temple||Tolerance / Orthodoxy
|-
|-
| <div id="Hydraulics">Hydraulics</div> || [[#Machinery|Machinery]] || [[#Windlass|Windlass]] (with [[#Scholarship|Scholarship]]), [[#Ballistics|Ballistics]] (with [[#Cartography|Cartography]]), Free Ballista || Ballista, Mill
| <div id="Hydraulics">Hydraulics</div>||[[#Machinery|Machinery]]||[[#Windlass|Windlass]] (with [[#Scholarship|Scholarship]])<br>[[#Ballistics|Ballistics]] (with [[#Cartography|Cartography]])<br>[[Units#Ballista|Free Ballista]]||Ballista||Mill||
|-
|-
| <div id="Cartography">Cartography</div> || [[#Metaphysics|Metaphysics]], [[#Navigation|Navigation]] || [[#Lateen Sail|Lateen Sail]] (with [[#Coinage|Coinage]]), [[#Ballistics|Ballistics]] (with [[#Hydraulics|Hydraulics]]) || Trireme, Harbor, Steal Research
| <div id="Cartography">Cartography</div>||[[#Metaphysics|Metaphysics]]<br>[[#Navigation|Navigation]]||[[#Lateen Sail|Lateen Sail]] (with [[#Coinage|Coinage]])<br>[[#Ballistics|Ballistics]] (with [[#Hydraulics|Hydraulics]])||Trireme||Harbor||Steal Research
|}
|}


;Goods Boost
=== Tier 6 (1000 Science) ===
:+400 {{icon|iron}}, +400 {{icon|stone}}, +400 {{icon|wood}}


= Tier 6 (1000 Science) =
{| class="wikitable"
 
{| class="wikitable sortable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Improvements Unlocked !! Other Unlocks
|-
|-
| <div id="Lateen Sail">Lateen Sail</div> || [[#Cartography|Cartography]], [[#Coinage|Coinage]] || [[#Fiscal Policy|Fiscal Policy]] (with [[#Jurisprudence|Jurisprudence]]), Free Dromon || Dromon, Autarky / Trade League
| <div id="Lateen Sail">Lateen Sail</div>||[[#Cartography|Cartography]]<br>[[#Coinage|Coinage]]||[[#Fiscal Policy|Fiscal Policy]] (with [[#Jurisprudence|Jurisprudence]])<br>[[Units#Dromon|Free Dromon]]||Dromon|| ||Autarky / Trade League
|-
|-
| <div id="Jurisprudence">Jurisprudence</div> || [[#Scholarship|Scholarship]] || [[#Fiscal Policy|Fiscal Policy]] (with [[#Lateen Sail|Lateen Sail]]), Free Court Minister || Insurrection, Guilds / Elites
| <div id="Jurisprudence">Jurisprudence</div>||[[#Scholarship|Scholarship]]||[[#Fiscal Policy|Fiscal Policy]] (with [[#Lateen Sail|Lateen Sail]])<br>Free Court Minister|| || ||Insurrection<br>Guilds / Elites
|-
|-
| <div id="Martial Code">Martial Code</div> || [[#Stirrups|Stirrups]] || [[#Barding|Barding]] (with [[#Battle Line|Battle Line]]) || Towers, Pilgrimage / Holy War
| <div id="Martial Code">Martial Code</div>||[[#Stirrups|Stirrups]]||[[#Barding|Barding]] (with [[#Battle Line|Battle Line]])||Towers|| ||Pilgrimage / Holy War
|-
|-
| <div id="Vaulting">Vaulting</div> || [[#Architecture|Architecture]] || Happiness Boost || Cathedral, Iconography / Calligraphy
| <div id="Vaulting">Vaulting</div>||[[#Architecture|Architecture]]||Happiness Boost|| ||Cathedral||Iconography / Calligraphy
|-
|-
| <div id="Bodkin Arrow">Bodkin Arrow</div> || [[#Manor|Manor]] || [[#Infantry Square|Infantry Square]], Free Longbowman, Free Cimmerian Archer || Longbowman
| <div id="Bodkin Arrow">Bodkin Arrow</div>||[[#Manor|Manor]]||[[#Infantry Square|Infantry Square]]<br>[[Units#Longbowman|Free Longbowman]]<br>[[Units#Cimmerian Archer|Free Cimmerian Archer]]||Longbowman|| ||
|-
|-
| <div id="Windlass">Windlass</div> || [[#Scholarship|Scholarship]], [[#Hydraulics|Hydraulics]] || [[#Chain Drive|Chain Drive]], Free Cataphract Archer, Free Crossbowman || Crossbowman
| <div id="Windlass">Windlass</div>||[[#Scholarship|Scholarship]]<br>[[#Hydraulics|Hydraulics]]||[[#Chain Drive|Chain Drive]]<br>[[Units#Cataphract Archer|Free Cataphract Archer]]<br>[[Units#Crossbowman|Free Crossbowman]]||Crossbowman|| ||
|}
|}


;Happiness Boost
=== Tier 7 (1600 Science) ===
:(All Cities) - +1 Happiness Level
 
= Tier 7 (1500 Science) =


{| class="wikitable sortable"
{| class="wikitable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Tech Cards Unlocked !! Units Unlocked !! Other Unlocks
|-
|-
| <div id="Fiscal Policy">Fiscal Policy</div> || [[#Lateen Sail|Lateen Sail]], [[#Jurisprudence|Jurisprudence]] || [[#Economic Reform|Economic Reform]], Free Court Merchant || Coin Debasement / Monetary Reform
| <div id="Fiscal Policy">Fiscal Policy</div>||[[#Lateen Sail|Lateen Sail]]<br>[[#Jurisprudence|Jurisprudence]]||[[#Economic Reform|Economic Reform]]<br>Free Court Merchant|| ||Coin Debasement / Monetary Reform
|-
|-
| <div id="Barding">Barding</div> || [[#Steel|Steel]], [[#Martial Code|Martial Code]] || [[#Military Prestige|Military Prestige]] (with [[#Infantry Square|Infantry Square]] and [[#Cohorts|Cohorts]]) || Cataphract
| <div id="Barding">Barding</div>||[[#Steel|Steel]]<br>[[#Martial Code|Martial Code]]||[[#Military Prestige|Military Prestige]] (with [[#Infantry Square|Infantry Square]] and [[#Cohorts|Cohorts]])||Cataphract||
|-
|-
| <div id="Infantry Square">Infantry Square</div> || [[#Bodkin Arrow|Bodkin Arrow]] || [[#Military Prestige|Military Prestige]] (with [[#Barding|Barding]] and [[#Cohorts|Cohorts]]), Free Court Soldier, Free Phalangite || Pikeman
| <div id="Infantry Square">Infantry Square</div>||[[#Bodkin Arrow|Bodkin Arrow]]||[[#Military Prestige|Military Prestige]] (with [[#Barding|Barding]] and [[#Cohorts|Cohorts]])<br>Free Court Soldier<br>[[Units#Phalangite|Free Phalangite]]||Pikeman||
|-
|-
| <div id="Cohorts">Cohorts</div> || [[#Land Consolidation|Land Consolidation]], [[#Battle Line|Battle Line]] || [[#Military Prestige|Military Prestige]] (with [[#Barding|Barding]] and [[#Infantry Square|Infantry Square]]), Free Legionary || Swordsman
| <div id="Cohorts">Cohorts</div>||[[#Land Consolidation|Land Consolidation]]<br>[[#Battle Line|Battle Line]]||[[#Military Prestige|Military Prestige]] (with [[#Barding|Barding]] and [[#Infantry Square|Infantry Square]])<br>[[Units#Legionary|Free Legionary]]||Swordsman||
|-
|-
| <div id="Chain Drive">Chain Drive</div> || [[#Windlass|Windlass]] || [[#Industrial Progress|Industrial Progress]] (with [[#Ballistics|Ballistics]]) || Polybolos
| <div id="Chain Drive">Chain Drive</div>||[[#Windlass|Windlass]]||[[#Industrial Progress|Industrial Progress]] (with [[#Ballistics|Ballistics]])||Polybolos||
|-
|-
| <div id="Ballistics">Ballistics</div> || [[#Hydraulics|Hydraulics]], [[#Cartography|Cartography]] || [[#Industrial Progress|Industrial Progress]] (with [[#Chain Drive|Chain Drive]]) || Mangonel
| <div id="Ballistics">Ballistics</div>||[[#Hydraulics|Hydraulics]]<br>[[#Cartography|Cartography]]||[[#Industrial Progress|Industrial Progress]] (with [[#Chain Drive|Chain Drive]])||Mangonel||
|}
|}


= Tier 8 (2000 Science) =
=== Tier 8 (2000 Science) ===


{| class="wikitable sortable"
{| class="wikitable"
|-
|-
! Technology !! Prerequisites !! Leads To !! Effects
! Technology !! Prerequisites !! Other Unlocks
|-
|-
| <div id="Economic Reform">Economic Reform</div> || [[#Fiscal Policy|Fiscal Policy]] || || Court Merchant, +1 Victory Point
| <div id="Economic Reform">Economic Reform</div>||[[#Fiscal Policy|Fiscal Policy]]||Court Merchant<br>+1 Victory Point
|-
|-
| <div id="Military Prestige">Military Prestige</div> || [[#Barding|Barding]], I[[#nfantry Square|nfantry Square]], [[#Cohorts|Cohorts]] || || Court Soldier, +1 Victory Point
| <div id="Military Prestige">Military Prestige</div>||[[#Barding|Barding]]<br>[[#Infantry Square|Infantry Square]]<br>[[#Cohorts|Cohorts]]||Court Soldier<br>+1 Victory Point
|-
|-
| <div id="Industrial Progress">Industrial Progress</div> || [[#Chain Drive|Chain Drive]], [[#Ballistics|Ballistics]] || || Court Minister, +1 Victory Point
| <div id="Industrial Progress">Industrial Progress</div>||[[#Chain Drive|Chain Drive]]<br>[[#Ballistics|Ballistics]]||Court Minister<br>+1 Victory Point
|}
|}


All Tier 8 technologies can be researched multiple times
All Tier 8 technologies can be researched multiple times, with the cost increasing by 500 Science each time.

Latest revision as of 03:34, 25 June 2025

The tech tree

Technologies ("Techs") are empire upgrades that cost Science and provide various benefits. Each Technology unlocks additional Technologies when researched.

All available Techs are placed in a draw pile and shuffled. Whenever a Tech is completed, Four Techs (five, with The Oracle, and three, at the beginning of the game) will be drawn from this shuffled deck and presented to the player to choose from. One can be selected to research, at which point the Nation's Science output will be dedicated to paying the Tech's cost until it is fully researched. Techs not chosen will be put in a discard pile which is shuffled once the deck is empty to form a new deck. Bonus Cards not chosen will be permanently removed from the game. Scholar Leaders can redraw Techs once each turn, discarding all currently offered Techs (permanently, for Bonus Cards) to draw a new hand.

After a tech is completed, any newly available techs are added to the discard pile and a new set of techs will be drawn from the draw pile for the player to choose from.

Bonus Cards[edit]

Some Technologies unlock Bonus Cards, which are added to the discard pile just like the regular Techs unlocked by researching that Tech. When researched, these Bonus Cards give a one-time bonus, such as 200 , and do not unlock further Techs. If Bonus Cards are not researched the first time they are offered, they are trashed, or permanently removed from the game. Because of this, it is sometimes useful to time Technology research so that Bonus Cards are unlocked when they will be useful, rather than allowing them to be trashed because they appeared when not needed.

List of Bonus Cards[edit]

Name Unlocked By Cost Bonus
Stone Boost Stonecutting 40 200
Food Boost Husbandry 60 200
Free Settler Drama 60 Gain Settler in Capital
Border Boost Aristocracy 60 [All Cities] +6 Border Tiles
Free Trireme Navigation 100 Gain Trireme in Capital
Orders Boost Phalanx 100 20
Free Exotic Fur Spoked Wheel 100 Add Exotic Fur
Free Archer Forestry 100 Gain Archer in Capital
Free Ebony Forestry 100 Add Ebony
Free Bireme Steel 100 Gain Bireme in Capital
Training Boost Steel 100 800
Free War Elephant Steel 100 Gain War Elephant in Capital
Civics Boost Sovereignty 100 800
Free Court Scholar Metaphysics 100 Gain Court Scholar
Money Boost Coinage 200 4,000
Free Silk Coinage 200 Add Silk
Free Court Minister Citizenship 200 Gain Court Minister
Free Maceman Portcullis 200 Gain Maceman in Capital
Free Onager Portcullis 200 Gain Onager in Capital
Free Perfume Architecture 200 Add Perfume
Free Horseman Land Consolidation 200 Gain Horseman in Capital
Free Horse Archer Land Consolidation 200 Gain Horse Archer in Capital
Free Ballista Composite Bow 200 Gain Ballista in Capital
Free Camel Archer Monasticism 200 Gain Camel Archer in Capital
Free War Elephant Machinery 200 Gain War Elephant in Capital
Goods Boost Machinery 200 400 , 400 , 400
Free Court Scholar Scholarship 400 Gain Court Scholar
Happiness Boost Vaulting 400 [All Cities] +1 Happiness Level
Free Longbowman Manor 400 Gain Longbowman (x2) in Capital
Free Court Soldier Battle Line 400 Gain Court Soldier
Free Crossbowman Hydraulics 400 Gain Crossbowman (x2) in Capital
Free Dromon Cartography 400 Gain Dromon (x2) in Capital
Free Porcelain Lateen Sail 600 Add Porcelain
Free Court Minister Jurisprudence 600 Gain Court Minister
Free Court Merchant Fiscal Policy 1000 Gain Court Merchant
Free Court Soldier Infantry Square 1000 Gain Court Soldier
Free Court Merchant Chain Drive 1000 Gain Court Merchant

List of Technologies[edit]

Technologies are listed below, sorted by tier. Technologies of the same tier appear in the same column of the Tech tree, and have the same cost, but are otherwise not necessarily related.

Tier 1 (80 Science)[edit]

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

Tier 2 (120 Science)[edit]

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

Tier 3 (200 Science)[edit]

Technology Prerequisites Tech Cards Unlocked Units Unlocked Improvements Unlocked Other Unlocks
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

Tier 4 (400 Science)[edit]

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

Tier 5 (600 Science)[edit]

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

Tier 6 (1000 Science)[edit]

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

Tier 7 (1600 Science)[edit]

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)[edit]

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, with the cost increasing by 500 Science each time.

Retrieved from "https://www.oldworldwiki.org/index.php?title=Technology&oldid=30479"