Recruit settlers and build your society.
Cities are where your population lives, and where your facilities are built. You can assign one governor per city. A governor affects the production and costs of that city. Below 5.0 update, they were named as Colonies.
Cities (formerly colony), like Mining Outposts, are founded on the world's map. Cities and Outposts cannot be placed on water, on lava, or too close to each other. This does not recognize that the world is round, however. For example, you can place two cities on the southwest and southeast corner of the map, despite the fact that in real life they would be right next to each other (This has since been changed in update 5.7 to no longer be possible). Since the the boundaries of a city are circular, the most space efficient way to place them in most cases is in an hexagonal packing. (In the older versions of Terragenesis. The boundaries of a city was a rectangle with a width twice as long as it's height.)
Find the minimum distances you can place a city at here
Find the too close message here.
The higher the latitude, the closer the cities will get close to each other.
The first city you found on a world is for free, but each subsequent city costs 5 million credits more than the last. If you lose any cities (through flooding, melting, worldkiller asteroids, or by demolishing them yourself), the price of founding new ones will go down again. So if you lose all cities, the first one will be free again, the second 5 million etc.
Cities can produce revenue either from buildings such as Spaceports and Coral Reefs, or from features that they gain in random events. Unlike mining revenue, these sources of income do not become depleted, and there is no limit on how many random events a city can collect, making them increasingly important over time. However, if a city is abandoned, then all building revenue stops until it is repopulated, and the randomly accumulated income sources are gone permanently.
The number of facilities you can build in a city depends on how much population lives there.
- Main article: Building Slots
Demolishing a city costs a minimum 1 million credits; if the city has a population of at least 1000, the cost is 1000x of the population instead. For example, a city of 1 million costs 1 billion to demolish (you can simply disable Habitations to reduce population to zero first, but that won't work if the planet is already habitable). Additionally, you are also charged for equal to 1% of the demolish fees for buildings in the city (e.g. if you have nothing but a Hab Unit I, which normally costs 100,000 to demolish, 1000 is added to the city demolish fee).
The more population a city has, the bigger it will look on your planet, and the more light it will emit.
- Main article: City Names