ANCIENT Era
Pottery	Animal Husbandry
Mining	Sailing
Astrology	Irrigation
Archery	Writing
Masonry	Bronze Working
The Wheel
CLASSICAL Era
Celestial Navigation	Currency
Horseback Riding	Iron Working
Shipbuilding	Mathematics
Construction	Engineering
MEDIEVAL Era
Military Tactics	Apprenticeship
Stirrups	Machinery
Education	Military Engineering
Castles
RENAISSANCE Era
Cartography	Mass Production
Banking	Gunpowder
Printing	Square Rigging
Astronomy	Metal Casting
Siege Tactics
INDUSTRIAL Era
Industrialization	Scientific Theory
Ballistics	Military Science
Steam Power	Sanitation
Economics	Rifling
MODERN Era
Flight	Replaceable Parts
Steel	Electricity
Radio	Chemistry
Combustion
ATOMIC Era
Advanced Flight	Rocketry
Advanced Ballistics	Combined Arms
Plastics	Computers
Nuclear Fission	Synthetic Materials
INFORMATION Era
Telecommunications	Satellites
Guidance Systems	Lasers
Composites	Stealth Technology
Robotics	Nanotechnology
Nuclear Fusion	Future Tech

ANCIENT Era

Pottery

Cost:	25
Required For:	Writing \| Irrigation
Allows Buildings:	Granary

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Animal Husbandry

Cost:	25
Required For:	Archery \| Horseback Riding
Allows Improvements:	Pasture \| Camp \| Kurgan

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Mining

Cost:	25
Required For:	Masonry \| Bronze Working \| The Wheel
Allows Improvements:	Mine \| Quarry
Allows removal of:	Forest

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Sailing

Cost:	50
Required For:	Shipbuilding \| Celestial Navigation
Allows Improvements:	Fishing Boats
Allows Embarkation of:	Builder
Allows Units:	Barbarian Galley \| Galley \| Norwegian Longship
Boosts:	Boost of 50%, triggered by settling on a coast.

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Astrology

Cost:	50
Required For:	Celestial Navigation
Allows Buildings:	Shrine
Allows Wonders:	Stonehenge
Boosts:	Boost of 50%, triggered by finding a Natural Wonder.

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Irrigation

Cost:	50
PreRequisites:	Pottery
Allows Improvements:	Plantation \| Stepwell
Allows Wonders:	Hanging Gardens
Allows removal of:	Marsh
Boosts:	50% boost, triggered by having 1 Farm

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Archery

Cost:	50
PreRequisites:	Animal Husbandry
Allows Units:	Archer
Boosts:	Boost of 50%, triggered by killing a unit with a Slinger

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Writing

Cost:	50
PreRequisites:	Pottery
Required For:	Currency
Allows Buildings:	Library
Boosts:	Boost of 50%, triggered by meeting another Civiliation.

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Masonry

Cost:	80
PreRequisites:	Mining
Required For:	Construction
Allows Improvements:	Great Wall
Allows Buildings:	Walls
Allows Wonders:	Pyramids
Allows Units:	Battering Ram
Boosts:	50% boost, triggered by having 1 Quarry

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Bronze Working

Cost:	80
PreRequisites:	Mining
Required For:	Iron Working
Allows Resources:	Iron
Allows Buildings:	Barracks
Allows Units:	Spearman \| Greek Hoplite
Allows removal of:	Jungle
Boosts:	Boost of 50%, triggered by killing 3 barbarians.

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The Wheel

Cost:	80
PreRequisites:	Mining
Required For:	Engineering
Allows Buildings:	Water Mill
Allows Units:	Heavy Chariot \| Egyptian Chariot Archer
Boosts:	50% boost, triggered by having 1 Mine

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CLASSICAL Era

Celestial Navigation

Cost:	120
PreRequisites:	Sailing \| Astrology
Allows Buildings:	Lighthouse
Allows Wonders:	Great Lighthouse
Allows Embarkation of:	Trader
Boosts:	50% boost, triggered by having 2 Fishing Boats

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Currency

Cost:	120
PreRequisites:	Writing
Required For:	Mathematics \| Apprenticeship
Allows Buildings:	Market
Boosts:	Boost of 50%, triggered by having 1 Trade Routes.

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Horseback Riding

Cost:	120
PreRequisites:	Animal Husbandry
Required For:	Construction \| Apprenticeship \| Stirrups
Allows Buildings:	Stable
Allows Units:	Horseman \| Scythian Horse Archer \| Indian Varu
Boosts:	50% boost, triggered by having 1 Pasture

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Iron Working

Cost:	120
PreRequisites:	Bronze Working
Required For:	Machinery
Allows Units:	Swordsman \| Roman Legion \| Kongo Shield Bearer
Boosts:	Boost of 50%, triggered by building 0 Mine on Iron

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Shipbuilding

Cost:	200
PreRequisites:	Sailing
Required For:	Cartography \| Mass Production
Allows Wonders:	Colossus
Allows Units:	Quadrireme
Boosts:	Boost of 50%, triggered by having 2 Galley

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Mathematics

Cost:	200
PreRequisites:	Currency
Required For:	Military Tactics \| Education
Allows Wonders:	Petra
Boosts:	Boost of 50%, triggered by having 3 unique specialty districts.
Other Effects:	Increases Sea Movement by 1.

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Construction

Cost:	200
PreRequisites:	Masonry \| Horseback Riding
Required For:	Castles \| Military Engineering
Allows Wonders:	Terracotta Army
Allows Units:	Siege Tower
Boosts:	Boost of 50%, triggered by building a Water Mill
Boosts::	Boost of 50%, triggered by researching the technology Construction

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Engineering

Cost:	200
PreRequisites:	The Wheel
Required For:	Machinery
Allows Units:	Catapult
Boosts:	Boost of 50%, triggered by building a Walls

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MEDIEVAL Era

Military Tactics

Cost:	300
PreRequisites:	Mathematics
Allows Wonders:	Huey Teocalli
Allows Units:	Japanese Samurai \| Norwegian Berserker \| Pikeman
Boosts:	Boost of 50%, triggered by killing a unit with a Spearman

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Apprenticeship

Cost:	300
PreRequisites:	Currency \| Horseback Riding
Required For:	Education \| Gunpowder
Allows Buildings:	Workshop
Boosts:	50% boost, triggered by having 3 Mine

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Stirrups

Cost:	300
PreRequisites:	Horseback Riding
Required For:	Banking \| Gunpowder
Allows Units:	Knight \| Arabian Mamluk
Makes Obsolete:	Sumerian War Cart
Boosts:	Boost of 50%, triggered by adopting the Feudalism

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Machinery

Cost:	300
PreRequisites:	Iron Working \| Engineering
Required For:	Printing
Allows Improvements:	Lumber Mill
Allows Units:	Crossbowman \| Chinese Crouching Tiger
Makes Obsolete:	Slinger
Boosts:	Boost of 50%, triggered by having 3 Archer

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Education

Cost:	390
PreRequisites:	Mathematics \| Apprenticeship
Required For:	Mass Production \| Banking \| Astronomy
Allows Buildings:	University
Allows Wonders:	Hagia Sophia
Boosts:	Boost of 50%, triggered by gaining a Great Scientist

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Military Engineering

Cost:	390
PreRequisites:	Construction
Required For:	Gunpowder
Allows Buildings:	Armory
Allows Units:	Military Engineer
Boosts:	Boost of 50%, triggered by having 1 Districts

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Castles

Cost:	390
PreRequisites:	Construction
Required For:	Siege Tactics
Allows Buildings:	Castle
Allows Wonders:	Alhambra
Boosts:	Boost of 50%, triggered by having 6 policy slots.

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RENAISSANCE Era

Cartography

Cost:	540
PreRequisites:	Shipbuilding
Required For:	Square Rigging
Allows Units:	Caravel
Boosts:	Boost of 50%, triggered by having 2 Districts
Other Effects:	Allows units to traverse Ocean. Increases Sea Movement by 1.
Other Effects:	Allows units to traverse Ocean. Increases Sea Movement by 1.

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Mass Production

Cost:	540
PreRequisites:	Shipbuilding \| Education
Required For:	Industrialization
Allows Buildings:	Shipyard
Allows Wonders:	Venetian Arsenal
Boosts:	50% boost, triggered by having 1 Lumber Mill

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Banking

Cost:	540
PreRequisites:	Stirrups \| Education
Required For:	Economics
Allows Buildings:	Bank
Allows Wonders:	Great Zimbabwe
Boosts:	Boost of 50%, triggered by adopting the Guilds

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Gunpowder

Cost:	540
PreRequisites:	Apprenticeship \| Stirrups \| Military Engineering
Required For:	Metal Casting
Allows Resources:	Niter
Allows Units:	Musketman \| Spanish Conquistador
Makes Obsolete:	Warrior
Boosts:	Boost of 50%, triggered by building a Armory

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Printing

Cost:	540
PreRequisites:	Machinery
Required For:	Military Science
Allows Wonders:	Forbidden City
Boosts:	Boost of 50%, triggered by having 2 University
Other Effects:	Allows visibility of foreign lands with appropriate treaty. Increases tourism for Writing Great Works by 200%.
Other Effects:	Allows visibility of foreign lands with appropriate treaty. Increases tourism for Writing Great Works by 200%.

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Square Rigging

Cost:	660
PreRequisites:	Cartography
Required For:	Steam Power
Allows Units:	Frigate
Boosts:	Boost of 50%, triggered by killing a unit with a Musketman

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Astronomy

Cost:	660
PreRequisites:	Education
Required For:	Scientific Theory
Allows Wonders:	Potala Palace
Boosts:	Boost of 50%, triggered by building a University on a mountain.
Boosts::	Boost of 50%, triggered by researching the technology Astronomy

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Metal Casting

Cost:	660
PreRequisites:	Gunpowder
Required For:	Ballistics
Allows Units:	Bombard
Boosts:	Boost of 50%, triggered by having 2 Crossbowman

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Siege Tactics

Cost:	660
PreRequisites:	Castles
Required For:	Military Science
Allows Improvements:	Fort
Allows Buildings:	Star Fort
Boosts:	Boost of 50%, triggered by having 2 Bombard

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INDUSTRIAL Era

Industrialization

Cost:	805
PreRequisites:	Mass Production
Required For:	Steam Power \| Flight
Allows Buildings:	Factory \| Electronics Factory
Allows Wonders:	Ruhr Valley
Boosts:	Boost of 50%, triggered by having 3 Workshop

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Scientific Theory

Cost:	805
PreRequisites:	Astronomy
Required For:	Economics \| Sanitation \| Flight
Allows Wonders:	Oxford University
Boosts:	Boost of 50%, triggered by adopting the The Enlightenment

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Ballistics

Cost:	805
PreRequisites:	Metal Casting
Required For:	Rifling \| Steel
Allows Units:	Field Cannon
Makes Obsolete:	Archer \| Scythian Horse Archer \| Egyptian Chariot Archer
Boosts:	50% boost, triggered by having 2 Fort

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Military Science

Cost:	805
PreRequisites:	Printing \| Siege Tactics
Required For:	Rifling
Allows Buildings:	Military Academy
Allows Units:	Cavalry \| Russian Cossack \| English Redcoat \| French Garde Imperiale
Boosts:	Boost of 50%, triggered by killing a unit with a Knight

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Steam Power

Cost:	925
PreRequisites:	Square Rigging \| Industrialization
Required For:	Electricity \| Radio
Allows Resources:	Coal
Allows Units:	Ironclad
Makes Obsolete:	Galley
Boosts:	Boost of 50%, triggered by having 2 Shipyard
Other Effects:	Increases Sea Movement by 1.

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Sanitation

Cost:	925
PreRequisites:	Scientific Theory
Required For:	Chemistry
Allows Buildings:	Sewer
Allows Units:	Medic
Boosts:	Boost of 50%, triggered by having 2 Districts

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Economics

Cost:	925
PreRequisites:	Banking \| Scientific Theory
Required For:	Replaceable Parts
Allows Buildings:	Stock Exchange
Allows Wonders:	Big Ben
Boosts:	Boost of 50%, triggered by having 2 Bank

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Rifling

Cost:	925
PreRequisites:	Ballistics \| Military Science
Required For:	Combustion
Allows Units:	American Rough Rider \| Ranger
Boosts:	Boost of 50%, triggered by building 0 Mine on Niter

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MODERN Era

Flight

Cost:	1035
PreRequisites:	Industrialization \| Scientific Theory
Required For:	Radio
Allows Improvements:	Airstrip
Allows Buildings:	Hangar
Allows Units:	Observation Balloon \| Biplane
Boosts:	Boost of 50%, triggered by building an industrial (or later) era wonder.

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Replaceable Parts

Cost:	1035
PreRequisites:	Economics
Required For:	Advanced Ballistics
Allows Units:	Infantry
Makes Obsolete:	Swordsman \| Roman Legion \| Kongo Shield Bearer
Boosts:	Boost of 50%, triggered by having 3 Musketman

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Steel

Cost:	1035
PreRequisites:	Ballistics
Required For:	Combustion \| Advanced Ballistics \| Combined Arms
Allows Wonders:	Eiffel Tower
Allows Units:	Artillery \| Battleship
Makes Obsolete:	Catapult \| Quadrireme
Boosts:	Boost of 50%, triggered by building 0 Mine on Coal

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Electricity

Cost:	1135
PreRequisites:	Steam Power
Required For:	Computers
Allows Buildings:	Seaport \| Power Plant
Allows Units:	Submarine \| German Uboat
Makes Obsolete:	Norwegian Longship
Boosts:	Boost of 50%, triggered by having 3 Privateer

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Radio

Cost:	1135
PreRequisites:	Steam Power \| Flight
Required For:	Advanced Flight \| Rocketry
Allows Improvements:	Beach Resort
Allows Buildings:	Broadcast Center \| Film Studio
Boosts:	Boost of 50%, triggered by creating a National Park.
Boosts::	Boost of 50%, triggered by researching the technology Radio

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Chemistry

Cost:	1135
PreRequisites:	Sanitation
Required For:	Rocketry
Allows Buildings:	Research Lab
Allows Units:	At Crew
Boosts:	Boost of 50%, triggered by having a research agreement.

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Combustion

Cost:	1135
PreRequisites:	Rifling \| Steel
Required For:	Combined Arms \| Plastics
Allows Resources:	Oil
Allows Improvements:	Oil Well
Allows Units:	Tank
Makes Obsolete:	Heavy Chariot \| Indian Varu
Boosts:	Boost of 50%, triggered by extracting an artifact.
Other Effects:	Increases Sea Movement by 1.

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ATOMIC Era

Advanced Flight

Cost:	1225
PreRequisites:	Radio
Required For:	Satellites
Allows Resources:	Aluminum
Allows Buildings:	Airport
Allows Units:	Fighter \| American P51 \| Bomber
Boosts:	Boost of 50%, triggered by having 3 Biplane

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Rocketry

Cost:	1225
PreRequisites:	Radio \| Chemistry
Required For:	Satellites \| Guidance Systems
Allows Improvements:	Missile Silo
Boosts:	Boost of 50%, by stealing this technology.

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Advanced Ballistics

Cost:	1225
PreRequisites:	Replaceable Parts \| Steel
Required For:	Nuclear Fission \| Guidance Systems
Allows Units:	Antiair Gun \| Machine Gun
Makes Obsolete:	Crossbowman \| Chinese Crouching Tiger
Boosts:	Boost of 50%, triggered by having 2 Power Plant

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Combined Arms

Cost:	1225
PreRequisites:	Steel \| Combustion
Required For:	Nuclear Fission
Allows Units:	Aircraft Carrier \| Destroyer
Makes Obsolete:	Caravel
Boosts:	50% boost, triggered by having 1 Airstrip

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Plastics

Cost:	1225
PreRequisites:	Combustion
Required For:	Synthetic Materials
Allows Improvements:	Offshore Oil Rig
Boosts:	Boost of 50%, triggered by building 0 Oil Well on Oil

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Computers

Cost:	1375
PreRequisites:	Electricity
Required For:	Telecommunications \| Robotics
Boosts:	Boost of 50%, triggered by having 8 policy slots.
Other Effects:	Allows a free spy. Increases tourism for all Great Works by 100%.
Other Effects:	Allows a free spy. Increases tourism for all Great Works by 100%.

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Nuclear Fission

Cost:	1375
PreRequisites:	Advanced Ballistics \| Combined Arms
Required For:	Lasers
Allows Resources:	Uranium
Boosts:	Boost of 50%, by stealing this technology.
Boosts::	Boost of 50%, triggered by researching the technology Nuclear Fission

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Synthetic Materials

Cost:	1375
PreRequisites:	Plastics
Required For:	Composites \| Stealth Technology
Allows Units:	Helicopter
Makes Obsolete:	Horseman
Boosts:	Boost of 50%, triggered by having 2 Districts

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INFORMATION Era

Telecommunications

Cost:	1540
PreRequisites:	Computers
Allows Units:	Nuclear Submarine
Makes Obsolete:	English Seadog \| Field Cannon
Boosts:	Boost of 50%, triggered by having 2 Broadcast Center
Boosts::	Boost of 50%, triggered by researching the technology Telecommunications

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Satellites

Cost:	1540
PreRequisites:	Advanced Flight \| Rocketry
Required For:	Future Tech
Allows Units:	Mechanized Infantry
Makes Obsolete:	Japanese Samurai \| Norwegian Berserker \| Musketman \| Spanish Conquistador
Boosts:	Boost of 50%, by stealing this technology.

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Guidance Systems

Cost:	1540
PreRequisites:	Rocketry \| Advanced Ballistics
Allows Units:	Rocket Artillery \| Mobile Sam
Makes Obsolete:	Bombard
Boosts:	Boost of 50%, triggered by destroying 0 Fighter

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Lasers

Cost:	1540
PreRequisites:	Nuclear Fission
Required For:	Nuclear Fusion
Allows Units:	Jet Fighter \| Missile Cruiser
Makes Obsolete:	Frigate \| Privateer
Boosts:	Boost of 50%, by stealing this technology.

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Composites

Cost:	1540
PreRequisites:	Synthetic Materials
Required For:	Nanotechnology
Allows Units:	Modern At \| Modern Armor
Makes Obsolete:	Spearman \| Greek Hoplite \| Knight \| Arabian Mamluk \| Pikeman
Boosts:	Boost of 50%, triggered by having 3 Tank

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Stealth Technology

Cost:	1540
PreRequisites:	Synthetic Materials
Allows Units:	Jet Bomber
Boosts:	Boost of 50%, by stealing this technology.

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Robotics

Cost:	1795
PreRequisites:	Computers
Required For:	Future Tech
Boosts:	Boost of 50%, triggered by adopting the Globalization

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Nanotechnology

Cost:	1795
PreRequisites:	Composites
Required For:	Future Tech
Boosts:	Boost of 50%, triggered by building 0 Mine on Aluminum

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Nuclear Fusion

Cost:	1795
PreRequisites:	Lasers
Required For:	Future Tech
Boosts:	Boost of 50%, by stealing this technology.

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Future Tech

Cost:	2050
PreRequisites:	Satellites \| Robotics \| Nanotechnology \| Nuclear Fusion

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