Summary: all equipment, resources, and most marine activities, depend upon structures, selected and placed by the commander. Placed structures must be built by marines.

Most command networks were never intended for military use. In order to "teach" these networks to create new equipment – like guns, turrets, or upgrades to existing equipment – the commander must first build the following structures. These structures work together, allowing more and more powerful upgrades, weapons, and abilities. To get an overall picture, see the tech tree.

The following list describes each structure's function, the equipment it makes available, and what new structures can be built once it is on online. If it allows equipment or other structures to be created within a certain range, these too are noted.