Halcyon 6

On the edge of Terran space lies Halcyon 6, a derelict starbase left behind by a mysterious precursor race. Your mission is to reclaim the derelict station and rebuild it. A mysterious alien force is making a beeline towards Earth and this starbase is the best chance for the New Terran Federation to establish new alliances, research new technologies and otherwise figure out a way to stop the impending invasion. (mobygames.com)