This is a Random Event. Occurs in:
- Civilian Sector
- Slug Controlled Nebula
- Slug Home Nebula
in a Plasma Storm in a Nebula. Can also occur as a nebula filler event in any sector.
You find two heavily damaged ships floating nearby, the remains of a battle. You begin to harvest some usable debris when you hear the sounds of someone beaming aboard followed by the shouts of a boarding party.
This event is called "STORM_BOARDING" in the datafiles.