Ambassador 3: Changing Fate

Fifty thousand years ago, a meteorite hit the planet Asto, giving its Aghyrian inhabitants mere days of notice. Three ships escaped the Armageddon. Two went to the neighbouring planet. The third, a massive generation ship, refused to take on refugees, and then vanished without a trace.

It's coming back.

Its initial burst of communication caused the outage of the Exchange, the FTL network for transport and communication, but since then the ship has been silent. It jumps about at random, using ...