This boss is the first bloated zombie you can fight. You fight him in a quest for raider. He is not resident or weak to weapons. He has over 1500 health and is tough if you are a low level. In a quest in episode 4 you need to rescue Red and guarding the door is a raging security zombie killing him gives you a piece of equipment. In episode 5 there is another raging security zombie at the bottom of the stairs at the hydrach building. Later you need to rescue Red again and another raging security zombie guards the door.