Nightmare Fuel / Attack of the Mutant Penguins

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• When playing the game, there's an occasional breathing sound coming from the Doomscale. Combined with a lack of music, it is remarkably unnerving.
  • In the MS-DOS version, the teleporter produces a creepy sound that sounds like a creature that's dying.
  • There is also a low sinister laugh that plays seemingly at random for no reason.
• When it comes to the Atari Jaguar version of the game, the level theme "Horror High Jinxs" is terrifying in general, as the platforms are composed of a gooey mess of skulls and other body parts. For some levels with that theme, you might come across a penguin composed of the same dribbling mess.
  • As for the MS-DOS version, the seventeenth level named "Dribbling Puss Sacs" is pretty much the same as the theme, only the platforms and the body parts composed of them are blue. Some levels of the MS-DOS version even have graphics referencing that theme, such as the fifth level titled "Festering Boil Burst".
• The MS-DOS version carries its own unique level known only as "?", though it is probably the best way to describe it. It is a surreal pale realm covered in random things including a clock, drooling monstrous teeth, and a distorted child's head that seems to be crying.
• The game over screen might also creep people out with its especially monstrous looking penguin, especially how it comes up like a Jump Scare.