In the future the resources of earth have all but dried up. The mega corporations have turned their gaze upon nearby asteroid belts for their rich wealth of resources. As an independent prospector you are tasked with establishing colonies on the richest and most strategic asteroids and selling them off to the highest bidder.
Here is the most recent iteration of the tech tree, as of the most recent build all these techs are implemented. I have some additions planned including capital ships and a few more exotic super-weapons.