A Spaceport is a large space station that serves as the primary defense of inhabited planets as well as those planets' orbital construction facility. Spaceports can be built directly from colonized worlds, without the need for a construction ship. It can construct ships as well as modules which upgrade the spaceport itself. Spaceports' internal framework itself can be upgraded in order to allow construction of larger ships and additional spaceport modules. A newly built spaceport has two module slots, one of which is taken up by its defense system. Each additional level unlocks another module slot to a maximum of seven at level six. Each spaceport level also increases its damage and defensive capabilities. Ships in orbit around a spaceport have a reduced upkeep cost of -25%. This reduction can be increased by some modules.
Aside from building and maintaining ships, one of the main functions of spaceports is to increase an empire's Naval Capacity. This increase in imperial Naval Capacity scales with the level of the spaceport.
Spaceports can be built on any colonized world for a cost of 360 Minerals (though ruler traits can make them cheaper) and take 12 months to build. Once built, they have a base maintenance cost of 3 Energy per month. The spaceport can be upgraded, with an increasing mineral cost for each level.
|Level||HP||Armour||Construction rate||Naval capacity||Weapon damage||Tracking||Mineral Cost|
Modules are unlocked through research. Some research options are limited to empires with certain ethics. Modules have a wide variety of effects. For example defense, economical benefit or ship support. As of 1.3, there are no longer any modules which can be built that rely on strategic resources to function.
Note that the Fleet Academy and the Engineering Bay's upkeep reduction only provide their benefits to ships produced at that specific Spaceport. You can however upgrade ships made at spaceports without by upgrading at a station that has the relevant modules.