Game concept (Civ4)

Game concepts are events which affect the outcome of alliances, cities, etc. There are a total of 48 game concepts:
== List ==
* Air Units 
* Animals
* Barbarians
* Borders
* Buildings
* Cities
* City Network
* Civics
* Combat
* Commerce
* Culture
* Diplomacy
* Draft
* Exploration
* Food
* Golden Age
* Great People
* Happiness
* Health
* Hurry Production
* Improvements
* Irrigation
* Leaders
* Maintenance
* Maps
* Movement
* Nukes
* Production
* Promotions
* Religion
* Research
* Resistance
* Resources
* Revolution
* Spaceship
* Specialists
* Technology
* Terrain
* Trade
* Transport
* Treasury
* United Nations
* Units
* Vassal States
* Victory
* War
* Wealth
* Wonders
== See also ==
* Game concept in other games