Freeciv 3.1.4 tech help (Civ2 ruleset)

Advanced Flight


Alphabet


Amphibious Warfare

* Allows Port Facility (with Oceanic terrain).

Astronomy

* Allows Copernicus' Observatory.

Atomic Theory


Automobile

* Allows Super Highways.

Increases the population's contribution to pollution.

Banking

* Allows Bank (with Marketplace).

Bridge Building

Allows roads to be built on river tiles.

Bronze Working

* Allows Colossus.

Ceremonial Burial

* Allows Temple.

Chemistry


Chivalry


Code of Laws

* Allows Courthouse.

Combined Arms


Combustion


Communism

* Allows Communism.
* Allows Police Station.
* Allows United Nations.

Reduces the effect of Cathedrals.

Computers

* Allows Research Lab (with University).
* Allows SETI Program.

Conscription


Construction

* Allows Aqueduct.
* Allows Colosseum.
* Allows Fortress (with Land terrain and "Settlers" units).

Allows Settlers and Engineers to build fortresses.

Currency

* Allows Marketplace.

Democracy

* Allows Democracy.
* Allows Statue of Liberty.

Economics

* Allows Stock Exchange (with Bank).
* Allows A.Smith's Trading Co..

Electricity

Improves the effect of Colosseums.

Electronics

* Allows Hydro Plant (with River and Factory).
* Allows Hoover Dam.

Engineering

* Allows King Richard's Crusade.

Environmentalism

* Allows Solar Plant (with Factory).

Espionage


Explosives


Feudalism

* Allows Sun Tzu's War Academy.

Flight

Decreases one-time revenue from new trade routes.

Fundamentalism

* Allows Fundamentalism.

Fusion Power


Genetic Engineering

* Allows Cure For Cancer.

Guerilla Warfare


Gunpowder

* Allows Barracks II.

Horseback Riding


Industrialization

* Allows Factory.
* Allows Women's Suffrage.

Population will start contributing to pollution.

Invention

* Allows Leonardo's Workshop.

Iron Working


Labor Union


Laser

* Allows SDI Defense.

Leadership


Literacy

* Allows Great Library.

Machine Tools


Magnetism


Map Making

* Allows Lighthouse.

Masonry

* Allows City Walls.
* Allows Palace.
* Allows Great Wall.
* Allows Pyramids.

Mass Production

* Allows Mass Transit.

Increases the population's contribution to pollution.

Mathematics


Medicine

* Allows Shakespeare's Theater.

Metallurgy

* Allows Coastal Defense (with Oceanic terrain).

Miniaturization

* Allows Offshore Platform (with Oceanic terrain).

Mobile Warfare

* Allows Barracks III.

Monarchy

* Allows Monarchy.

Monotheism

* Allows Cathedral.
* Allows Michelangelo's Chapel.

Mysticism

* Allows Oracle.

Improves the effect of Temples.

Navigation

* Allows Magellan's Expedition.

Nuclear Fission

* Allows Manhattan Project.

Nuclear Power

* Allows Nuclear Plant (with Factory).

Gives sea units one extra move.

Philosophy

* The first player to learn Philosophy gets an immediate advance.

Physics


Plastics

* Allows Space Component.

Increases the population's contribution to pollution.

Polytheism


Pottery

* Allows Granary.
* Allows Hanging Gardens.

Radio

* Allows Airport.
* Allows Airbase (with Land terrain and "Airbase" units).

Allows Settlers and Engineers to build airbases.

Railroad

* Allows Darwin's Voyage.
* Allows Railroad (with Road, "Settlers" units, and Land terrain).

Allows Settlers and Engineers to upgrade roads to railroads.

Decreases one-time revenue from new trade routes.

Recycling

* Allows Recycling Center.

Refining

* Allows Power Plant (with Factory).

Refrigeration

* Allows Supermarket.
* Allows Farmland (with Irrigation).

Allows Settlers and Engineers to upgrade irrigation systems to farmland.

Robotics

* Allows Mfg. Plant (with Factory).

Rocketry

* Allows SAM Battery.

Sanitation

* Allows Sewer System (with Aqueduct).

Seafaring

* Allows Harbor (with Oceanic terrain).

Space Flight

* Allows Space Structural.
* Allows Apollo Program.

Stealth


Steam Engine

* Allows Eiffel Tower.

Steel


Superconductors

* Allows Space Module.

Tactics


The Corporation

* Allows Capitalization.

The Republic

* Allows Republic.

The Wheel


Theology

* Allows J.S. Bach's Cathedral.

Improves the effect of Cathedrals.

Theory of Gravity

* Allows Isaac Newton's College.

Trade

* Allows Marco Polo's Embassy.

University

* Allows University (with Library).

Warrior Code


Writing

* Allows Library.