There was a time when most of the universe left Rubi-Ka to itself. "It's just a barren rock, a mining colony on the other side of space," people would say. Those times are over...
Rubi-Ka is the only known source of notum, an element that holds the key to technology and progress. The galactic economy is defined by notum, and whoever controls the notum has acquired a solid foundation for ultimate power.
Inhabitants of Rubi-Ka may form organisations in order to mine their own notum. A mining operation involves a control tower being built at a suitable place on the planet's surface so that notum extraction can take place.
This control tower needs to be protected by defence installations as members of rival groups will try to take it away from the current owners at every opportunity.
Members of a notum mining organisation never know when they'll be called upon to defend their mining rights.
Here are the components of a notum mining site. In reality they would be more spread out of course.
This is the control tower and a pair of defence turrets. Al these scenery pieces are from Scotia Grendel.
These are personal towers that players can deploy as needed. Unlike the large turrets and tower these are temporary structures.