Rules Pages

Citizens | Allows you to modify the names and abilities of citizens and specialists.
Civilizations | Allows you to modify any of the 16 civilizations in the game.
Civilization Advances | Allows you to modify any of the technologies in the tech tree.
Combat Experience | Allows you to modify the how many hit points each experience level confers.
Culture | Allows you to modify the effects of culture.
Difficulty Levels | Allows you to modify various settings that control how difficult the AI is at each difficulty level.
Diplomats and Spies | Allows you to modify the missions that diplomats and spies can perform.
Eras | Allows you to modify the names of game eras.
General Settings | Various miscellaneous game settings.
Governments | Allows you to modify the various governments in the game.
Improvements and Wonders | Allows you to modify the effects and prerequisites of all city improvements and wonders.
Natural Resources | Allows you to modify the bonuses and effects of natural resources
Terrain | Allows you to modify the effects, bonuses, and allowable resources on terrain types.
Units | Allows you to modify the abilities and prerequisites of game units.
Worker Jobs | Allows you to modify the prerequisites and duration of worker jobs.
World Sizes | Allows you to modify the parameters of the world sizes.