Technology.mp2d

Quick Jump: List of Technologies
=Technologies=
During the game all nations will race to discover more powerful advances (technologies.) A few advances provide immediate benefits, such as making new actions available to your units. Many introduce new units or buildings you can construct. Most are gateways to further technology. Beware that some advances also make things obsolete. While obsolete units merely become impossible to make, obsolete buildings are immediately sold, and obsolete wonders lose their effect.
By default, each player starts with no technology (this could be changed with the techlevel server option). You direct your research toward one advance at a time. Research progress is measured in research points which are called "bulbs." You can generate your own bulbs through trade and scientists, or receive them from others through blueprints. Unlike gold, which can be transferred or spent on anything, bulbs are research knowledge tied toward acquiring a specific technology. Each technology has a specific bulb cost.
== Researching technologies ==
Each "bulb" or research point you generate is permanently credited toward the technology that was your current research when the bulb was generated. The technology becomes "discovered" and usable when you acquire bulbs equivalent to 100% of its bulb cost. If you switch technology goals, you will start learning the new technology from zero again. You will keep a research bulb credit toward your previous research, which will be there when you come back to your previous research.
Instead of selecting each new advance manually, you can establish a future goal that is several technologies away, and your scientists will work through all the prerequisite advances automatically. (In Freeciv-web, you can do this by 1) clicking a far off tech for which you do not yet have the pre-requisites, 2) middle click, 3) alt-right click.) You can open the Tech tab at the top of the screen to view science progress and set new tech goals. The online hover-help system displays information for every item and technology in the game, allowing you to explore technologies and the capabilities they unlock.
== Techleak ==
The more nations who already know a technology, the more the bulb cost will be reduced, due to a phenomenon called techleak. (See /help techleak). Loosely speaking if the techleak setting is 50: if no other nations know a tech, it will be full bulb cost. If all the nations of the world know a tech, it's 50% cost. All gradations in between those two extremes will fit between those proportions. Techleak puts a bit of a premium price on "rushing techs" faster than the rest of the world, though having such tech certainly brings advantages.
==Blueprints==
The only way to learn a technology is to research it. But there are several ways to more easily gain advances from other civilizations. You might discover Blueprints for enemy technology when you capture a city*. You can steal Blueprints with Emissaries, Diplomats and Spies. You can also get Blueprints from another player in a tech trade as part of the terms of a pact.
Tech theft through espionage, city conquest, and tech trade give you Blueprints: a non-transferable bulb credit toward a specific technology advance. The bulb credit reduces the remaining bulb cost for researching the advance. A blueprint fills a technology's bulb account up to but not past the blueprint's value toward that technology. Bulbs are not like "wallet dollars" you can transfer from one research project to another. It is a waste of research effort to acquire partial bulbs into a tech for which you later get blueprints, since the bulb account for a blueprinted tech will not exceed the bulb value of the blueprint.
Use /help blueprints and /show blueprints to learn about the server setting and its configuration in a particular game.
* In older game versions, events such as city conquest and technology theft immediately awarded you a technology. This is no longer the case.
==Research Goals==
If you have no future goal and discover a tech, your current research target will go to an unselected state. You will probably have remaining bulbs. At TC, if your current research is still unselected and you have no future goal, then a current research is randomly set for you.
Whenever a new current research is set, all remaining bulbs are permanently assigned to that current research instantly. The same happens for subsequent techs along the path to your future goal, if there is one.
👉🏻 Blueprints can be obtained by diplomatic treaty, theft, or conquest at any point in time, especially in multiplayer games. It is favorable to leave current research unselected and set new future goals turn-by-turn, so you can weigh your chances of acquiring blueprints before spending your remaining bulbs on techs for which blueprints might give you the bulbs for free.
👉🏻 TIP - If you are unsure how many bulbs are remaining after your last discovery, middle-click an already-researched technology to fetch this information from server.
==The Space Race==
If the server option is enabled, the game may be won peacefully by building a spacecraft and becoming the first civilization to reach Alpha Centauri. To enter the "space race" you must complete the Apollo Program. With the necessary technologies, this allows you to begin building spacecraft parts:
{| width="100%" cellpadding="4"	
	Space Module
cost:2000 upkeep:0
requires:Superconductors
The skeleton of your spacecraft consists of structural components, each of which can hold in place either a component or module. Components provide fuel and propulsion systems, and decrease the amount of time your craft will require to reach Alpha Centauri; you can install up to sixteen, though they must be installed in pairs. Modules themselves come in three flavors: a habitation module provides living space for ten thousand colonists; a life support module can keep ten thousand colonists alive; and a solar panel provides the power required by any two other modules.
Use the spaceship window to observe your progress as you build your spacecraft. You may manufacture spacecraft elements anywhere with a factory; they will automatically be assembled in your capital city. As you add components you improve the craft's probability of success and travel time; you may launch as soon as you find these satisfactory. If several civilizations are building spacecraft, they are faced with the decision of whether to launch quickly and start their craft on its way, or continue building in the hopes of launching a faster spacecraft later, or one with a higher probability of success.
During construction and after launch, the spaceship is considered a building of your capital city. It will be lost if your capital is taken or destroyed.
==List of Technologies==
Technology
*requirements	Effects 	Allows (Units, Buildings, Techs)
Obsoletes (Units, Buildings)
Advanced Flight
*Radio
*Machine Tools	 	
* Heavy Bomber
* Carrier
*Combined Arms (with Computers)
*Radar (with Mechanization)
Alphabet 	
*Disables Well-Diggers 	
* Trireme
* Code of Hammurabi
*Code of Laws
*Map Making
*Mathematics (with Masonry)
*Writing
Alphabet 	
*Disables Well-Diggers 	
* Boat
Amphibious Warfare
*Navigation
*Tactics	 	
* Marines
* Port Facility
Astronomy
*Mysticism
*Mathematics	 	
* War Galley
* Copernicus' Observatory
*Navigation (with Seafaring)
*Theory of Gravity (with University)
Atomic Theory
*Theory of Gravity
*Physics	 	
*Nuclear Fission (with Mass Production)
Automobile
*Combustion
*Steel	
*+1 move to Light Armor 	
* Truck
* Submarine
* Super Highways
*Mass Production (with The Corporation)
*Mobile Warfare (with Miniaturization)
Automobile
*Combustion
*Steel	
*+1 move to Light Armor 	
* Caravan
* Wagon
* Colossus
* Leonardo's Workshop
Avionics
*Rocketry
*Computers	 	
* Jet Fighter
* Multi-Fighter
* Ground Strike Fighter
*Stealth (with Superconductors)
Avionics
*Rocketry
*Computers	 	
* Fighter
* Escort Fighter
* Dive Bomber
Banking
*Trade
*The Republic	
*Prevents Philosophy from awarding bonus tech
*Converts upkeep on Infantry from 1 shield to 1 gold
*Globally expires extra gold bonus for new trade routes from capitals. 	
* Bank
* Medici Bank
*Democracy (with Invention)
*Economics (with University)
*Industrialization (with Railroad)
Bridge Building
*Iron Working
*Construction	
*Allows roads on rivers.
*Upgrades all roads in cities to Bridges 	
*Railroad (with Steam Engine)
Bronze Working 	 	
* Phalanx
* Colossus
* Agōgē of Sparta
*Currency
*Iron Working (with Warrior Code)
Ceremonial Burial	 	
* Temple
* Mausoleum of Mausolos
*Monarchy (with Code of Laws)
*Mysticism
*Polytheism (with Horseback Riding)
Ceremonial Burial	 	
* Totem Pole
Chemistry
*University
*Medicine	 	
*Balloon
*Explosives (with Gunpowder)
*Refining (with Steel)
Chivalry
*Feudalism
*Horseback Riding	 	
* Knights
*Leadership (with Gunpowder)
Chivalry
*Feudalism
*Horseback Riding	 	
* Horsemen
* Chariot
Code of Laws
*Alphabet	 	
* Courthouse
*Literacy (with Writing)
*Monarchy (with Ceremonial Burial)
*The Republic (with Literacy)
*Trade (with Currency)
Combined Arms
*Mobile Warfare
*Computers	 	
* Paratroopers
* Ground Troops
* Fanatics
* Helicopter
* Transport Helicopter
Combined Arms
*Mobile Warfare
*Computers	 	
* Riflemen
* Alpine Troops
* Zealots
Combustion
*Refining
*Explosives	
*+1 move for Trains
*Increases population pollution 25% 	
* Zeppelin
* Barracks III
* Mass Transit
*Automobile
*Flight (with Theory of Gravity)
Combustion
*Refining
*Explosives	
*+1 move for Trains
*Increases population pollution 25% 	
* Balloon
* Barracks ll
* Sun Tzu's War Academy
Combustion.2
*Combustion
*Tactics	Specialization tech for Combustion 	
* Light Armor
Combustion.2
*Combustion
*Tactics	Specialization tech for Combustion 	
* Cavalry
Communism
*Philosophy
*Industrialization	
*Allows government Communism.
*pre-req for spawning Partisans 	
*Proletarians
* Police Station
* United Nations
* Commissariat of Agriculture
* Propaganda Ministry
*Espionage (with Democracy)
*Guerilla Warfare (with Tactics)
*Nationalism
Communism
*Philosophy
*Industrialization	
*Allows government Communism.
*pre-req for spawning Partisans 	
Computers
*Radio
*Mechanization	 	
* Research Lab
* The Internet
* JTIDS
*Robotics (with Mobile Warfare)
*Laser (with Nuclear Power)
*Combined Arms (with Advanced Flight)
*Rocketry (with Radar)
Computers
*Radio
*Mechanization	 	
* Temple of Artemis
* Isaac Newton's College
Conscription
*Democracy
*Metallurgy	
*Cities can use multi-slot build slots for units...
**...if the city has the required buildings and output
*Allows upgrading all foot units to Musketeers for free. 	
* Riflemen
* Zealots (Theocracy only)
*Tactics (with Leadership)
Conscription
*Democracy
*Metallurgy	
*Cities can use multi-slot build slots for units...
**...if the city has the required buildings and output
*Allows upgrading all foot units to Musketeers for free. 	
* Musketeers
* Falconeers
Construction
*Masonry
*Currency	
*Allows building Fortresses
*Allows mining deserts 	
* Siege Ram
* Aqueduct
* Amphitheater
* City Walls
* Great Wall
*Bridge Building (with Iron Working)
*Engineering (with The Wheel)
Currency
*Bronze Working	 	
* Marketplace
*Construction (with Masonry)
*Trade (with Code of Laws)
Democracy
*Banking
*Invention	
*Allows Democracy government
*Instant free upgrade to Workers II 	
* Workers II
* Statue of Liberty
*Conscription (with Metallurgy)
*Espionage (with Communism)
Democracy
*Banking
*Invention	
*Allows Democracy government
*Instant free upgrade to Workers II 	
* Workers
* Code of Hammurabi
Economics
*Banking
*University	 	
* Diplomat
* Stock Exchange
* A.Smith's Trading Co.
*The Corporation (with Industrialization)
Economics
*Banking
*University	 	
* Emissary
Electricity
*Metallurgy
*Magnetism	
*Increases Amphitheater effect +1
*+1 move point for Trains
*Reveals all tiles within one's borders
*Disallows making Lighthouse 	
* Destroyer
* Trawler
*Tesla's Laboratory
*Electronics (with The Corporation)
*Refrigeration (with Sanitation)
*Steel (with Industrialization)
Electricity
*Metallurgy
*Magnetism	
*Increases Amphitheater effect +1
*+1 move point for Trains
*Reveals all tiles within one's borders
*Disallows making Lighthouse 	
* Ironclad
Electronics
*The Corporation
*Electricity	 	
* Hydro Plant
* Hoover Dam
*Miniaturization (with Machine Tools)
*Nuclear Power (with Nuclear Fission)
Engineering
*The Wheel
*Construction	
*Allows building Canals
*Allows building Naval Base 	
* Ram Ship
* Ballista
* King Richard's Crusade
* Roman Colosseum
* Citadel of Aleppo
*Invention (with Literacy)
*Sanitation (with Medicine)
Environmentalism
*Recycling
*Space Flight	
*Reduces population pollution by 50% 	
* Solar Plant
* Wind Plant
Espionage
*Communism
*Democracy	
*Allows Diplomats and Patriarch to establish embassy...
**...vs Courthouse or Homeland Security 	
* Spy
Explosives
*Gunpowder
*Chemistry	Disallows free upgrade from Workers to Workers II 	
* Engineers
*Combustion (with Refining)
*Industrialization (with Railroad)
Explosives
*Gunpowder
*Chemistry	Disallows free upgrade from Workers to Workers II 	
* Workers II
Feudalism
*Iron Working
*Monarchy	
*Allows building Castles (with Construction) 	
* Pikemen
* Sun Tzu's War Academy
*Chivalry (with Horseback Riding)
*Theology (with Monotheism)
Feudalism
*Iron Working
*Monarchy	
*Allows building Castles (with Construction) 	
* Warriors
* Phalanx
Flight
*Combustion
*Theory of Gravity	 	
* Airplane
* Fighter
* Anti-Aircraft Artillery
*Flight.2
*Radio (with Miniaturization)
Flight.2
*Theory of Gravity	Specialization tech for Flight 	
* Dive Bomber
Fusion Power 
*Nuclear Power
*Superconductors	 	
* Hydrogen Bomb
* Doomsday Bomb
* Tactical Nuke
* Enrichment Facility
* Fusion Reactor
Fusion Power 
*Nuclear Power
*Superconductors	 	
* Medici Bank
Guerilla Warfare
*Communism
*Tactics	
*Globally sets ability to spawn Partisans for Communism, Democracy
*Globally sets ability to spawn Zealots or Fanatics for Theocracy 	
* Partisan
Guerilla Warfare
*Communism
*Tactics	
*Globally sets ability to spawn Partisans for Communism, Democracy
*Globally sets ability to spawn Zealots or Fanatics for Theocracy 	
* Scout
Gunpowder
*Invention
*Feudalism	
*pre-req for spawning Partisans
*prevents building new Castles 	
* Musketeers
* Barracks II
* Coastal Defense
*Explosives (with Chemistry)
*Leadership (with Chivalry)
*Metallurgy (with University)
Gunpowder
*Invention
*Feudalism	
*pre-req for spawning Partisans
*prevents building new Castles 	
* Archers
* Legion
* Pikemen
* Barracks
* Agōgē of Sparta
Horseback Riding 	Travelers spread news to the world if discovered before Turn 15 (2600 BC) 	
* Horsemen
* Scout
* Genghis Khan's Equestrian School
*Chivalry (with Feudalism)
*Polytheism (with Ceremonial Burial)
*The Wheel
Industrialization
*Railroad
*Banking	
*Increases population pollution 25% 	
* Transport
* Cargo Ship
* Factory
* Women's Suffrage
*Communism (with Philosophy)
*Steel (with Electricity)
*The Corporation (with Economics)
Industrialization
*Railroad
*Banking	
*Increases population pollution 25% 	
* Galleon
Invention
*Engineering
*Literacy	
*Increases units' vision in:
**Fortress, Naval Base, Castle
*Prevents Philosophy from awarding bonus tech 	
* Leonardo's Workshop
*Democracy (with Banking)
*Gunpowder (with Feudalism)
*Magnetism (with Navigation)
Iron Working 
*Bronze Working
*Warrior Code	 	
* Legion
*Bridge Building (with Construction)
*Feudalism (with Monarchy)
Laser
*Computers
*Nuclear Power	 	
* Satellite (with Apollo Program)
* SDI Defense
*Superconductors (with Space Flight)
Leadership
*Chivalry
*Gunpowder	 	
* Dragoons
*Tactics (with Conscription)
Leadership
*Chivalry
*Gunpowder	 	
* Knights
* Crusaders
Literacy
*Writing
*Code of Laws	 	
* Supreme Court
* Homeland Security (w/ Suprm.Crt.)
*Invention (with Engineering)
*Philosophy (with Mysticism)
* Physics (with Navigation)
* The Republic (with Code of Laws)
Machine Tools
*Steel
*Tactics	
*Globally obsoletes Great Wall when discovered 	
* Artillery
*Advanced Flight (with Radio)
*Miniaturization (with Electronics)
*Mechanization (with Mass Production)
Machine Tools
*Steel
*Tactics	
*Globally obsoletes Great Wall when discovered 	
* Cannon
* Great Wall
Magnetism
*Navigation
*Invention	 	
* Galleon
* Frigate
*Electricity (with Metallurgy)
*Steam Engine (with Physics)
Magnetism
*Navigation
*Invention	 	
* Caravel
Map Making
* Alphabet	
* +2 moves for Scouts 	
* Longboat
* Lighthouse
*Seafaring (with Pottery)
Masonry 	
*Allows building Forts 	
* Fortifications
* Ziggurat
*Construction (with Currency)
*Mathematics (with Alphabet)
Mass Production
*Automobile
*The Corporation	
*Increases population pollution 25%
*+20% output for Coal and Hydro Plants 	
* Magnum Turret
*Mechanization (with Machine Tools)
*Nuclear Fission (with Atomic Theory)
*Recycling
Mathematics
*Alphabet
*Masonry	 	
* Catapult
* Pyramids
*Astronomy (with Mysticism)
*University (with Philosophy)
Mechanization
*Mass Production
*Machine Tools	
*Allows converting Musketeers to Riflemen for free. 	
* Mechanized Infantry
*Computers (with Radio)
*Radar (with Advanced Flight)
Medicine
*Philosophy
*Trade	 	
* Shakespeare's Theatre
*Chemistry (with University)
*Microbiology (with The Corporation)
*Sanitation (with Engineering)
Metallurgy
*Gunpowder
*University	
*City Walls cost 75 (+10)
*Fortifications cost 45 (+10)
*Globally obsoletes all Siege Rams 	
* Cannon
* Gibraltar Fortress
*Conscription (with Democracy)
*Electricity (with Magnetism)
Metallurgy
*Gunpowder
*University	
*City Walls cost 75 (+10)
*Fortifications cost 45 (+10)
*Globally obsoletes all Siege Rams 	
* Catapult
* Siege Ram
Microbiology
*Medicine
*The Corporation	 	
* Pasteur Institute
Miniaturization
*Machine Tools
*Electronics	 	
* Offshore Platform
*Mobile Warfare (with Automobile)
*Radio (with Flight)
Mobile Warfare
*Automobile
*Miniaturization	 	
* Armor
*Combined Arms (with Advanced Flight)
*Robotics (with Computers)
Mobile Warfare
*Automobile
*Miniaturization	 	
* Cavalry
* Light Armor
* Genghis Khan's Equestrian School
Monarchy
*Ceremonial Burial 
*Code of Laws	
*Allows Monarchy government 	
* Peasants (with Magna Carta)
* Magna Carta
*Feudalism (with Iron Working)
Monarchy
*Ceremonial Burial 
*Code of Laws	
*Allows Monarchy government 	
* Chand Baori
* Ziggurat
Monotheism
*Philosophy
*Polytheism	 	
* Crusaders
* Cathedral
* Michelangelo's Chapel
*Theology (with Feudalism)
Monotheism
*Philosophy
*Polytheism	 	
* Elephants
Mysticism
*Ceremonial Burial	
*Doubles the effect of Temples 	
* Ecclesiastical Palace
* Temple of Artemis
* Oracle
*Astronomy (with Mathematics)
*Philosophy (with Literacy)
Nationalism
*Communism	
*Allows Nationalism government. 	
* Migrants
Navigation
*Seafaring
*Astronomy	 	
* Caravel
* Magellan's Expedition
*Amphibious Warfare (with Tactics)
*Physics (with Literacy)
Navigation
*Seafaring
*Astronomy	 	
* Longboat
* Galley
* War Galley
* Ram Ship
Nuclear Fission
*Mass Production
*Atomic Theory	 	
* Atom Bomb
* Manhattan Project
*Nuclear Power (with Electronics)
Nuclear Power
*Nuclear Fission
*Electronics	
*Gives sea units +2 moves 	
* Nuclear Plant
* Missile Submarine
*Laser (with Computers)
*Space Flight (with Rocketry)
Nuclear Power
*Nuclear Fission
*Electronics	
*Gives sea units +2 moves 	
* Submarine
Philosophy
*Mysticism
*Literacy	Gives a bonus tech blueprint before T85 (1600AD). Tech awarded will be random if you have no future goal. Otherwise, it will be the first undiscovered tech leading up to your selected "Future Goal." No bonus tech is given to nations who already have Banking, Invention, or Physics.	
* Pax Dei
*Communism (with Industrialization)
*Medicine (with Trade)
*Monotheism (with Polytheism)
*University (with Mathematics)
Philosophy
*Mysticism
*Literacy	Gives a bonus tech blueprint before T85 (1600AD). Tech awarded will be random if you have no future goal. Otherwise, it will be the first undiscovered tech leading up to your selected "Future Goal." No bonus tech is given to nations who already have Banking, Invention, or Physics.	
* The Sphinx
Physics
*Literacy
*Navigation	
*Increases unit vision from 1.44x to 2x
* Prevents Philosophy from awarding bonus tech 	
*Theory of Gravity (with Astronomy)
*Steam Engine (with Magnetism)
Plastics
*Robotics
*Space Flight	
*Increases population pollution 25% 	
* Armor II
* Space Component
Plastics
*Robotics
*Space Flight	
*Increases population pollution 25% 	
* Armor
Polytheism
*Horseback Riding
*Ceremonial Burial	 	
* Statue of Zeus
* Elephants
*Monotheism (with Philosophy)
Pottery 	
*Allows building Quays
*Disables Well-Diggers 	
* Workers
* Goods
* Granary
* Hanging Gardens
*Seafaring (with Map Making)
Radar
*Advanced Flight
*Mechanization	
*Allows building Radar installations on Airbases. 	
* Strategic Bomber
* AWACS
* Radar Tower
*Rocketry (with Computers)
Radio 
*Flight
*Miniaturization	
*Allows building Airbase
*Allows building Buoy 	
* Escort Fighter
* Medium Bomber
* Airport
*Advanced Flight (with Machine Tools)
*Radio.2
Radio 
*Flight
*Miniaturization	
*Allows building Airbase
*Allows building Buoy 	
* Mausoleum of Mausolos
Radio.2 
*Radio 	Specialization tech for Radio 	
* Bombs
Railroad
*Steam Engine
*Bridge Building	
*Allows upgrading Roads to Railroads
*Less first-time revenue for Trade Routes 	
* Train
* Darwin's Voyage
*Industrialization (with Banking)
Railroad
*Steam Engine
*Bridge Building	
*Allows upgrading Roads to Railroads
*Less first-time revenue for Trade Routes 	
* Appian Way
Recycling
*Mass Production	
*Reduces unit upgrade costs by 20% 	
* Recycling Center
*Environmentalism (with Space Flight)
Refining
*Chemistry
*Steel	
*Allows Oil Wells on Glaciers 	
* Battleship
* Coal Plant
*Combustion (with Explosives)
Refrigeration
*Sanitation
*Electricity	
*Allows upgrading Irrigation to Farmland
*Allows laying Fishtraps 	
* Supermarket
Robotics
* Mobile Warfare
*Computers	Leonardo's Workshop only upgrades 1 unit per turn 	
* Howitzer
* Mfg. Plant
*Plastics (with Space Flight )
Robotics
* Mobile Warfare
*Computers	Leonardo's Workshop only upgrades 1 unit per turn 	
* Artillery
* King Richard's Crusade
Rocketry
*Radar
*Computers	Leonardo's Workshop only upgrades 1 unit per turn 	
*File:U.missile_cruiserMissile Destroyer
* AEGIS Cruiser
* Cruise Missile
* SAM Battery
*Space Flight (with Nuclear Power)
*Avionics
Rocketry
*Radar
*Computers	Leonardo's Workshop only upgrades 1 unit per turn 	
* Cruiser
* Destroyer
Sanitation
*Engineering
*Medicine	 	
* Sewer System
* Refrigeration (with Electricity)
Seafaring
*Pottery
*Map Making	 	
* Galley
* Harbor 
*Navigation (with Astronomy)
Seafaring
*Pottery
*Map Making	 	
* Trireme
Space Flight
*Nuclear Power
*Rocketry	
*Increases unit vision
*Increases city radius vision 	
* Jet Bomber
* Mobile SAM
* Nuclear
* Space Structural
* Apollo Program
*Environmentalism (with Recycling)
*Plastics (with Robotics)
*Superconductors (with Laser)
*Space Flight.2
Space Flight
*Nuclear Power
*Rocketry	
*Increases unit vision
*Increases city radius vision 	
* Strategic Bomber
* Heavy Bomber
* Medium Bomber
Space Flight.2
*Space Flight	
*Specialization tech for Space Flight
*Mobile SAM built with 1 free Anti-Ballistic Missile
*AEGIS Cruiser built with 1 free Anti-Ballistic Missile 	
* Anti-Ballistic Missile
Stealth
*Superconductors	 	
* Spy Plane
* Stealth Fighter
* Stealth Multi-Fighter
* Stealth Bomber
Stealth
*Superconductors	 	
* AWACS
* Multi-Fighter
Steam Engine
*Physics
*Magnetism	
*Ends Colossus discount on Commerce units. 	
* Ironclad
* Eiffel Tower
*Railroad (with Bridge Building)
Steam Engine
*Physics
*Magnetism	
*Ends Colossus discount on Commerce units. 	
* Frigate
* Hanging Gardens
Steel
*Electricity
*Industrialization	
*Allows building Sea Bridge
*Allows building Bunker 	
* Cruiser
*Automobile (with Combustion)
*Machine Tools (with Tactics)
*Refining (with Chemistry)
Superconductors
*Space Flight
*Laser	
*Allows building MagLev super-rails 	
* Space Module
*Fusion Power
*Stealth
Tactics
*Conscription
*Leadership	 	
* Alpine Troops
* Cavalry
*Amphibious Warfare (with Navigation)
*Guerilla Warfare (with Communism)
*Machine Tools (with Steel)
*Combustion.2 (with Combustion)
Tactics
*Conscription
*Leadership	 	
* Dragoons
* Statue of Zeus
The Corporation
*Economics
*Industrialization	
*+25% Coinage rate for Stock Exchanges. (2.25 gold per shield) 	
* Freight 
*Electronics (with Electricity)
*Microbiology (with Medicine)
*Mass Production (with Automobile)
The Corporation
*Economics
*Industrialization	
*+25% Coinage rate for Stock Exchanges. (2.25 gold per shield) 	
* Goods
The Republic
*Code of Laws
*Literacy	
*Allows Republic government 	
*Banking (with Trade)
The Wheel
*Horseback Riding	 	
* Wagon
* Chariot
*Engineering (with Construction)
Theocracy
* Theology	 	
*Pilgrims
*Falconeers
Theocracy
* Theology	 	
* Pax Dei
Theology
*Feudalism
*Monotheism	
*Improves Cathedral effect by +1
*Improves Michelangelo effect by +1 	
* J.S. Bach's Cathedral
Theology
*Feudalism
*Monotheism	
*Improves Cathedral effect by +1
*Improves Michelangelo effect by +1 	
* Oracle
Theory of Gravity
*Astronomy
*Physics	 	
* Isaac Newton's College
*Atomic Theory (with Physics)
*Flight (with Combustion)
Trade
*Currency
*Code of Laws	 	
* Caravan
* Marco Polo's Embassy
*Banking (with The Republic)
*Medicine (with Philosophy)
University
*Mathematics
* Philosophy	 	
* University
*Chemistry (with Medicine)
*Economics (with Banking)
*Metallurgy (with Gunpowder)
*Theory of Gravity (with Physics)
Warrior Code 	
*Allows building Hideouts 	
* Archers
* Barracks
*Feudalism (with Monarchy)
*Iron Working (with Bronze Working)
Writing
*Alphabet	 	
* Emissary
* Library
*Literacy (with Code of Laws)