Originally Posted by Heretic (Post 1277805)

In some games, certain characters are flagged as essential and cannot be killed. In Oblivion, for instance, there are mods to remove the essential flag from all characters, but you run the risks of it breaking the plot/quests. I suspect there's something similar going on here. Certain crewman, the "bio'd" ones, likely cannot be killed. But the rest of the crew probably can. It might be possible to edit the files to allow essentials be killed, but care would have to be taken to ensure it doesn't break the game. Having a means to replace killed crew, for instance, would be required. Assuming that other crew members can be killed, which is far from certain, there would be a method to replacing them. If none of the crew can be killed, then there's likely to means to replace them. All conjecture, of course.