Kyonyuu Fantasy Gaiden 2/Nightmare Fuel

The first Gaiden had some, but its sequel also takes it Up To Eleven at some parts.
 * The Minotaur in the tower is already a hulking monster, but the way he kills his victims is rather disturbing. Despite his appearance, the Minotaur prefers to use psychic attacks where he eats the desires of his victims, which in turn causes their entire heads to melt.
 * The aptly named Undying Army, which is an army of super-powered zombies with horrifying visages. They're basically Zombie Apocalypses waiting to happen as they effortlessly overran several towns.