Civilization Revolution/Technologies

Technologies are achievements within the game that give the player access to new units, buildings, wonders, resources, government types, Great Persons and more technologies. They are obtained by accumulating enough Science and by possessing the required lower-level technologies.

Science
Science, like Gold may be converted from Trade. Its sole purpose is to be put towards the discovery of new technologies.

Science production may be improved by:
 * Building a Library (doubles science production in the city) or University (quadruples science production in the city)
 * Building one of the following wonders:
 * Colossus of Rhodes (+50% Science production in the city)
 * Oxford University (Instantly grants a technology)
 * Great Library (Obtain any technology known by at least two other civilizations)
 * Apollo Program (Instantly learn all technologies)
 * Settling a Great Scientist in a city (+50% Science in the city)
 * Using a Great Scientist to immediately complete the current research goal
 * Discovering the Lost City of Atlantis Mysterious Artifact (Provides 3x new technologies)
 * Assuming a Democratic government (+50% Science production in all cities)

List of technologies

 * "Tech-card" fields: The upper three fields of each "Tech-card" locate each technology in the overall technology tree, while the lower five fields indicate what items are made available as a result of discovering the technology.


 * Technology tiers: A technology's tier is equal to one greater than its highest tier prerequisite technology. This provies a measure of how advanced or late-game a specific technology is. Numbers in brackets beside each prerequisite technology represent its tier.


 * Overshadowed prerequisites: Technologies listed within curly brackets { } indicate an overshadowed prerequisite, i.e. its position as a prerequisite technology is largely redundant as another prerequisite technology would necessarily demand knowledge of the bracketed technology for the discovery of the former. To help illustrate this case, consider conducting research on Irrigation. This requires knowledge of both Masonry and Pottery. However, Masonry itself requires Pottery and hence should the player have researched Masonry, they must have researched Pottery was well. The exception to this case is when Technologies are obtained out of order through Village discovery, Technology trading, construction of certain Wonders, or the discovery of Mysterious Artifacts. In the case of Irrigation mentioned above, if the player say purchased the Masonry technology from another civilization, they may not conduct research on Irrigation until Pottery had also been discovered.

Advanced Flight

 * Type: Military
 * Tier: 9
 * Prerequisites: Flight (8), Industrialization (7)
 * Unit: Bomber
 * Building: -
 * Wonder:
 * Other: -
 * If first to research: 1x free Bomber

Alphabet

 * Type: Scientific
 * Tier: 1
 * Prerequisites: -
 * Unit: -
 * Building: Library
 * Wonder: Oracle of Delphi
 * Other: -
 * If first to research: -

Atomic Theory

 * Type: Scientific
 * Tier: 8
 * Prerequisites: Electricity (7), {Invention} (5), University (5)
 * Unit: -
 * Building: -
 * Wonder: Manhattan Project
 * Other: -
 * If first to research: +2 Science production to all cities

The Automobile

 * Type: Military
 * Tier: 8
 * Prerequisites: Combustion (7), Steel (7)
 * Unit: Artillery
 * Building: -
 * Wonder: -
 * Other: May now utilize Rubber special resource
 * If first to research: 1x free Artillery

Banking

 * Type: Economic
 * Tier: 5
 * Prerequisites: Currency (4), {Code of Laws} (3), Literacy (3)
 * Unit: -
 * Building: Bank
 * Wonder: -
 * Other: -
 * If first to research: Receive some gold

Bronze Working

 * Type: Military
 * Tier: 1
 * Prerequisites: -
 * Unit: Archer
 * Building: Barracks
 * Wonder: Colossus of Rhodes
 * Other: May now utilize Fish special resource
 * If first to research: 1x free Archer

Ceremonial Burial

 * Type: Cultural
 * Tier: 2
 * Prerequisites: Pottery (1)
 * Unit: -
 * Building: Temple
 * Wonder: Great Pyramid
 * Other: May now utilize Incense special resource
 * If first to research: 1x free Temple (?)

Code of Laws

 * Type: Military
 * Tier: 3
 * Prerequisites: Writing (2), {Alphabet} (1)
 * Unit: -
 * Building: Trading Post
 * Wonder: -
 * Other: May now utilize Cattle special resource; may use a Republic government
 * If first to research: 1x free Trading Post

Combustion

 * Type: Military
 * Tier: 7
 * Prerequisites: Gunpowder (6), Steam Power (6), Metallurgy (6)
 * Unit: Tank
 * Building: -
 * Wonder: -
 * Other: May now utilize Oil special resource
 * If first to research: 1x free Tank

Communism

 * Type: Military
 * Tier: 8
 * Prerequisites: Industrialization (7), University (5)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: May now use a Communism government
 * If first to research: Factories cost 33% less

Construction

 * Type: Military
 * Tier: 3
 * Prerequisites: Masonry (2), Iron Working (2)
 * Unit: -
 * Building: Workshop
 * Wonder: -
 * Other: May now utilize Oak special resource
 * If first to research: 1x free Workshop

The Corporation

 * Type: Military
 * Tier: 8
 * Prerequisites: Industrialization (7), {Banking} (5)
 * Unit: -
 * Building: -
 * Wonder: Military-Industrial Complex
 * Other: -
 * If first to research: +5 Gold production to all cities

Currency

 * Type: Economic
 * Tier: 4
 * Prerequisites: Bronze Working (1), Code of Laws (3)
 * Unit: Caravan
 * Building: Market
 * Wonder: Trade Fair of Troyes
 * Other: May not utilize Gold special resource
 * If first to research: 1x free Market, 1x free Caravan

Democracy

 * Type: Military
 * Tier: 4
 * Prerequisites: Code of Laws (3), Literacy (3)
 * Unit: Pikemen
 * Building: -
 * Wonder: Magna Carta
 * Other: Democracy
 * If first to research: 1x free Pikemen

Electricity

 * Type: Scientific
 * Tier: 7
 * Prerequisites: Steam Power (6), {Engineering } (4), Metallurgy (6)
 * Unit: Submarine
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: 1x free Submarine

Electronics

 * Type: Scientific
 * Tier: 9
 * Prerequisites: The Corporation (8), Electricity (7)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: +2 Trade production to all cities

Engineering

 * Type: Military
 * Tier: 4
 * Prerequisites: Construction (3), Mathematics (3)
 * Unit: -
 * Building: Aqueduct
 * Wonder: -
 * Other: -
 * If first to research: +2 Production to all cities

Feudalism

 * Type: Military
 * Tier: 5
 * Prerequisites: Monarchy (4), Horseback Riding (1)
 * Unit: Knight
 * Building: -
 * Wonder: -
 * Other: May now utilize Game special resource
 * If first to research: 1x free Knight

Flight

 * Type: Military
 * Tier: 8
 * Prerequisites: Combustion (7), {Metallurgy} (6), {Invention} (5)
 * Unit: Fighter
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: 1x free Fighter

Future Technologies

 * Type: Military
 * Tier: 8
 * Prerequisites: Superconductor (11), {Advanced Flight} (9), Globalization (11)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: First time researched: +1 Production to all Production-producing regions. Second time researched: +1 Food to all Food-producing regions. Third time researched: +1 Trade to all Trade-producing regions. Successive Future Technologies will repeat this cycle.
 * If first to research: -

Globalization

 * Type: Military
 * Tier: 11
 * Prerequisites: Networking (10), Mass Media (9)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: Receive +500 Gold instantly

Gunpowder

 * Type: Military
 * Tier: 6
 * Prerequisites: Invention (5), Feudalism (5)
 * Unit: Rifleman
 * Building: -
 * Wonder: -
 * Other: May now utilize Sulfur special resource
 * If first to research: 1x free Riflemen

Horseback Riding

 * Type: Military
 * Tier: 1
 * Prerequisites: -
 * Unit: Horsemen
 * Building: -
 * Wonder: -
 * Other: May now utilize Oxen special resource
 * If first to research: 1x free Horsemen

Industrialization

 * Type: Military
 * Tier: 7
 * Prerequisites: Steam Power (6), Banking (5)
 * Unit: -
 * Building: Factory
 * Wonder: -
 * Other: -
 * If first to research: +5 Gold production to all cities

Invention

 * Type: Military
 * Tier: 5
 * Prerequisites: Engineering (4), Literacy (3)
 * Unit: -
 * Building: -
 * Wonder: Leonardo's Workshop
 * Other: -
 * If first to research: 1x free Great Person

Iron Working

 * Type: Military
 * Tier: 2
 * Prerequisites: Bronze Working (1)
 * Unit: Legion
 * Building: -
 * Wonder: -
 * Other: May now utilize Iron special resource
 * If first to research: 1x free Legion

Irrigation

 * Type: Cultural
 * Tier: 3
 * Prerequisites: Masonry (2), {Pottery} (1)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: May now utilize Wheat special resource
 * If first to research: +1 Population to all cities

Literacy

 * Type: Scientific
 * Tier: 3
 * Prerequisites: Writing (2), {Alphabet} (1)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: May now utilize Wheat special resource
 * If first to research: +1 Population to all cities

Masonry

 * Type: Military
 * Tier: 2
 * Prerequisites: Pottery (1)
 * Unit: -
 * Building: Walls
 * Wonder: Great Wall
 * Other: May now utilize Marble special resource
 * If first to research: 1x free Walls

Mass Media

 * Type: Cultural
 * Tier: 9
 * Prerequisites: The Corporation (8), Printing Press (6)
 * Unit: -
 * Building: -
 * Wonder: Hollywood
 * Other: -
 * If first to research: +1 Population to all cities

Mass Production

 * Type: Military
 * Tier: 8
 * Prerequisites: Railroad (7), Industrialization (7)
 * Unit: Modern Infantry
 * Building: -
 * Wonder: -
 * Other: May now utilize Aluminium special resource
 * If first to research: 1x free Modern Infantry

Mathematics

 * Type: Military
 * Tier: 3
 * Prerequisites: Masonry (2), Writing (2)
 * Unit: Catapult
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: 1x free Catapult

Metallurgy

 * Type: Military
 * Tier: 6
 * Prerequisites: University (5), Engineering (4), Iron Working (2)
 * Unit: Cannon
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: 1x free Cannon

Monarchy

 * Type: Cultural
 * Tier: 4
 * Prerequisites: Code of Laws (3), {Writing} (2), Ceremonial Burial (1)
 * Unit: -
 * Building: -
 * Wonder: Himeji Samurai Castle
 * Other: May now utilize Dye special resource; May now use a Monarchy government
 * If first to research: 1x free Great Person

Navigation

 * Type: Military
 * Tier: 4
 * Prerequisites: Mathematics (3), Writing (2)
 * Unit: Galleon
 * Building: Harbour
 * Wonder: East India Company
 * Other: May now harvest Whale special resource
 * If first to research: 1x free Galleon

Networking

 * Type: Economic
 * Tier: 10
 * Prerequisites: Electronics (9), {The Corporation} (8)
 * Unit: -
 * Building: -
 * Wonder: Internet
 * Other: -
 * If first to research: Universities cost 50% less

Nuclear Power

 * Type: Scientific
 * Tier: 9
 * Prerequisites: Atomic Theory (8), Mass Production (8)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: May now utilize Uranium special resource
 * If first to research: +2 Production in all cities

Pottery

 * Type: Cultural
 * Tier: 1
 * Prerequisites: -
 * Unit: -
 * Building: Granary
 * Wonder: Hanging Gardens of Babylon
 * Other: May now utilize Wine special resource
 * If first to research: 1x free Granary (?)

Printing Press

 * Type: Cultural
 * Tier: 6
 * Prerequisites: University (5), Religion (5)
 * Unit: -
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: Bonus culture to all cities

Railroad

 * Type: Military
 * Tier: 7
 * Prerequisites: Steam Power (6)
 * Unit: -
 * Building: Iron Mine
 * Wonder: -
 * Other: -
 * If first to research: +2 Production to all cities

Religion

 * Type: Cultural
 * Tier: 5
 * Prerequisites: Monarchy (4), Ceremonial Burial (1)
 * Unit: -
 * Building: Cathedral
 * Wonder: -
 * Other: May now use a Fundamentalism government
 * If first to research: Bonus culture to all cities

Space Flight

 * Type: Cultural
 * Tier: 5
 * Prerequisites: Nuclear Power (9), Electronics (9), Advanced Flight
 * Unit: -
 * Building: Spaceship Fuel, Spaceship Propulsion, Spaceship Life Support, Spaceship Habitation
 * Wonder: Apollo Program
 * Other: -
 * If first to research: Reveal enitre map

Steam Power

 * Type: Military
 * Tier: 6
 * Prerequisites: Invention (5), {Engineering} (4), Iron Working (2)
 * Unit: Cruiser
 * Building: -
 * Wonder: -
 * Other: May now utilize Coal special resource
 * If first to research: 1x free Cruiser

Steel

 * Type: Military
 * Tier: 7
 * Prerequisites: Steam Power (6), Metallurgy (6)
 * Unit: Battleship
 * Building: -
 * Wonder: -
 * Other: -
 * If first to research: +2 Production to all cities

Superconductor

 * Type: Military
 * Tier: 11
 * Prerequisites: Space Flight (10), {Mass Production} (8)
 * Unit: -
 * Building: SDI Defense
 * Wonder: -
 * Other: -
 * If first to research: 1x free SDI Defense

University

 * Type: Scientific
 * Tier: 5
 * Prerequisites: Democracy (4), {Literacy} (3), Mathematics (3)
 * Unit: -
 * Building: University
 * Wonder: Oxford University
 * Other: -
 * If first to research: +2 Science production to all cities

Writing

 * Type: Scientific
 * Tier: 2
 * Prerequisites: Alphabet (1)
 * Unit: Spy
 * Building: -
 * Wonder: Great Library
 * Other: -
 * If first to research: 1x free Spy