Psychopaths (Dead Rising)

The psychopaths in the Dead Rising series are humans who have either gone criminally insane due to the sheer stress and the chaos of the zombie outbreak and/or seeing friends, family and others being slaughtered by the undead or are otherwise evil and see the outbreak as an opportunity to do whatever they wish. They serve as the games' bosses but players only come by most of them if they go in certain areas. Defeating them usually has a beneficial side-effect such as access to new areas, rescuing certain survivors and/or unique weapon drops.