Dead Rising Psychopaths

Upon entering the mall, Frank West thought he'd only have to deal with zombies. To his disappointment, he has to watch out for the various psychopaths that have taken refuge in the mall.

While the term psychopath is used as an umbrella term for all of the game's bosses, most of these are simply immoral people. Only a few of them are actually driven mad by the outbreak (Adam, Cliff, Steven), most of them are simply corrupt people taking advantage of the situation (Jo Slade, The Convicts), others are simply overcautious (The Hall Family). Brock Mason, in particular, is not mad nor immoral, but simply a soldier carrying out his orders. Likewise, Cletus Samson was not driven mad by the outbreak, but simply has trust issues with humans and may also be unable to distinguish a zombie from a human.

Trivia

 * Out of all the psychopaths, in Dead Rising, only Paul Carson can be saved, while in Dead Rising: Chop Till You Drop, Cletus is also savable.