This building produces all other buildings.
Produces power for all other facilities. Each have output of 100 units.
Converts spice into credits. Can hold 1000 credits.
Trains light infantry and infantry squads
Trains heavy troopers
Light Vehicles Factory
Produce light combat vehicles, is also needed to build heavy vehicles factory.
The radar enabels the radar map, giving you a early warning of enemy attacks and allows you to monitor enemy movement
Heavy vehicles factory
Produces tracked vehicles like harvesters and tanks.
Can also build MCV's.
Repairs your damaged vehicles. If you have carryall's you should try to surruond the repair facility with structures and walls, then the carryalls will fly in units and fly them back to where they picked them up (great when you attack because you will be reenforced by your repaired units).
The starport gives you a link to outside worlds, it gives you an opportunity to purchase units from merchants on other planets (not all units will be for sale, only the standard units).
Hi Tech factory
Produces carryalls and ornithopters (artridies only).
Basic base defence.
Long range base defence.