Cliff Hudson is one mentally unstable boss that appeared in Dead Rising.
Dead Rising[]
Cliff believed he was in the Vietnam War and seeing the others as enemy soldiers, and he fought in a cruel battle using his fation and all his years of combat training. After his fierce fight against Frank West and his defeat he reveals how having one of the game's most tragic stories and he recovers a conscience and explains what happened that his whole family was killed by a horde of zombies, and with that he lost control and received some flashback of the war and as he took his last breath he soon commented that the war never ended. Frank heard the story and respectfully closes Cliff's eyes.