Colonies are the basic economic unit of Galactic Civilizations III, comparable to a city in a traditional land-based 4X strategy title.
Basics[edit | edit source]
Each colony is a single planet. It has a certain number of tiles available to build improvements on, represented by its Class rating. It may have a special bonus associated with it, like a Shielded World's additional resistance to invasion. It may have one or more Trade Resources present. Individual tiles may have tile bonuses that increase the level of improvements built on and adjacent to them. Each colony can sponsor one shipyard to construct starships, and simultaneously build one social improvement or project.
Planetary Class[edit | edit source]
Every planet is assigned a class, from 0 (uninhabitable) to 26 (paradise!). The number designates how many tiles are available to house improvements.
Improvements[edit | edit source]
Improvements are buildings that increase the output or defense of the colony in various ways. Some, like Factories, multiply the manufacturing output by a percentage. Others, like Meditation Centers, don't increase output directly but boost Approval, which then increases growth and thereby productivity. Military improvements like the Champions Temple make the planet harder to conquer by increasing its resistance to invasion.
Special Improvements[edit | edit source]
Some improvements require a galactic resource to construct, and consume that resource until they're demolished. They tend to be extremely strong, though, like the Durantium Refinery which gives a +2 manufacturing adjacency bonus as well as providing one raw unit of manufacturing itself.
Wondrous Improvements[edit | edit source]
One-per-empire improvements like the Hyperion Shipyard are expensive, but give unique bonuses like giving all ships created by the shipyard this planet sponsors a boost to hit points.
Capitals[edit | edit source]
Colony capitals cannot be moved or demolished, but provide a +1 adjacency bonus to all types of improvements.
Terraforming[edit | edit source]
Certain technologies allow special Terraforming improvements. These potentially allow you to unlock new tiles for development, assuming there is land available for such development, effectively increasing the planet's class.
Invasion Damage[edit | edit source]
Tiles and improvements can be destroyed during planetary invasions, whether or not the invasion is successful. The likelihood of this happening depends on the invasion tactics used by the aggressor.