Space Hulk - 04 - Sin of Damnation - Cat Rescue

Space Hulk is the newest (third?) computer version of the old 1989 Games Workshop board game, where squads of Space Marines clad in Terminator armor board a derelict hulk to rid it of its current Genestealer occupants and retrieve whatever it is Space Marines want to retrieve from derelict vessels. Possibly millennia of back pay or a load of titanium screwdrivers, that will allow them to remove their armor and fix their chafing underwear. I can't think of other reasons why otherwise sane people would insert themselves into that mincing machine.