- Sylvarant Base's music literally sounds like there are prisoners being beaten. It's creepy the first time you go through it early in the game and doesn't stop being creepy even when you find that the Renegades aren't out to kill you after all.
- The worst offender is undoubtedly ExSpheres and the Exbelua creatures, which are humans that have been horribly mutated as a side-effect of producing ExSpheres. These people, despite being giant throbbing masses of green flesh, are also fully conscious and are in ridiculous amounts of pain from the mutation. It's possible to reverse this transformation, but only one mutated character is lucky enough to survive, and only through a sidequest.
- ExSpheres, if you use them correctly, enhance your combat abilities. However, their original intended purpose is to slowly turn a person into a soulless shell that does not age, cannot eat, sleep, or speak, and cannot feel, taste, or smell anything. Eventually, the consciousness is completely absorbed. And as the game points out more than a couple times, just because your consciousness is absorbed into an ExSphere doesn't mean it stops working.
- The Desians and their human ranches, where humans are treated like cattle in order to produce these Exspheres. And the rest of the world's humans don't particularly care, as long as their city isn't being attacked. The Desians also breed humans for the sole purpose of making more Exspheres.
- Zelos' monologue if you pick him at Flanoir. Particularly watching his mother being murdered in front of him, and the imagery that "red snow began to fall" - with the red snow being his mother's blood.
- The bonus chapter "Siblings" in the manga actually shows this happen, in all its wonderful glory.
- Zelos' whole storyline and role in the plot can be this in terms of sheer Adult Fear; essentially, one of your friends is deeply, terribly suicidal, and if you don't treat him right, he kills himself. It's not a comfortable thought, especially for anyone who has a depressed or mentally ill friend, especially as he only hints at how he really feels and it isn't obvious at all.
- How about the fact the inside of the Tower of Salvation is decorated with the corpses of past Chosens? And not just a few, we're talking about lots of them. And it gets even worse when you consider that each one of them were wearing a Cruxis Crystal when they died, meaning unless Cruxis was nice enough to destroy their crystal after their death? They were all trapped in a And I Must Scream state until their consciousness got absorbed.
- Two words: Presea's House. Many a Troper dropped their controller the first time they visited that place.
- Paying too much attention to stuff in this may cause nightmares. It's covered by cute graphics, but sometimes even that doesn't help. However, after Colette loses her soul, she's downright creepy, with Glowing Eyes of Doom and a complete apathy towards anything except that which threatens her.
- Mithos losing his bloody mind after Martel, who he had sacrificed everything and crossed every line known to man to resurrect, gives him a What the Hell, Hero? for his actions.
Mithos: Martel...even you reject me? No. Martel would never say something like that! Ha...haha...AHAHAHAHAHAHA! I won't allow that, DO YOU HEAR ME?!?
Nightmare Fuel / Tales of Symphonia
Once you get past the bright and cheery super-deformed graphics, Tales of Symphonia has a significantly large amount of Nightmare Fuel. Spoilers below.