Avorion

Several hundred years ago, a cataclysmic catastrophe nearly ripped your galaxy apart - an impassable ring of torn hyperspace fabric appeared in the center of the galaxy, which normal hyperspace engines can’t overcome.

Since this Event nobody has managed to get near the central regions of the galaxy. All you know is that the Event also spawned multiple untraversable hyperspace rifts throughout the entire galaxy and that a strange race of aliens, the Xsotan, has appeared in the center. It looks like these aliens have found a way to cross over the torn hyperspace fabric, but so far nobody has managed to establish contact with them.