Nightmare Fuel / Devil Summoner

• The game starts with a news reporter talking about weird creatures lurking around Hirasaki City, with strange and gruesome murders going on while the police is clueless about what to do. Just imagine living your every day life, unaware that demons and weird monsters are stalking your back, as soon as you take one step outside your home.
• Kyouji himself is pretty menacing. Just after saving your life, he starts threatening you, giving small hints about killing you because you saw too much.
• Sid Davis. Even as goofy as he looks with that star on his forehead, he's a sadistic bastard, even toying with you by trapping you in a unfinished building with no exits before killing you, just because you don't have the book he's looking for.
• Some demon designs are pretty freaky themselves. There's one called Agony and it's an obvious depiction of Jesus carrying the cross, with thorns and all bloody.