History NightmareFuel / CaveStory

** One room in Grasstown/Bushlands has a bed with red flower petals scattered on the floor. Then a frenzied Mimiga [[JumpScare jumps out of the fireplace]].

** During his boss fight, the Doctor is [[SmugSuper smugly confident]] of his victory... until he [[PowerIncontinence loses control of the Red Crystal]] and mutates into a mindless behemoth who [[TeleportSpam teleports at random]], all the while charging like a mad thing and creating dozens of bats from his hands. After beating him, his body ''[[FamilyUnfriendlyDeath dissolves into blood]]'' which ascends past the ceiling. Shortly afterwards, the blood ''reappears.'' As it turns out, the blood happens to contain the Doctor's consciousness, and [[TheGlovesComeOff he REALLY wants to kill you now.]] He uses his magic to [[BalefulPolymorph transform Misery and Sue into monstrosities]] before merging the remnants of himself with a zombified Undead Core. If you don't have two specific items by this point, you get to see the entire island crash to the ground, killing everything Momorin and Itoh didn't evacuate. If you ''do'' have them, you go through the game's equivalent of Hell.

* And then the revisited Egg Corridor immediately afterwards, which cranks the SceneryGorn UpToEleven especially with the bloody remains of half-formed Sky Dragons littering the place.

* The Plus versions include a bonus scenario, the Wind Fortress. In it, you have to navigate the underbelly of the island with all the risk of falling off the island. After fighting past a guarding wave of Gaudi bugs, you get into an industrialized zone where you encounter Curly copies that attack you relentlessly, to the point of breaking out of replication tubes to lunge wildly at you even without copies of the real Curly's clothes. It all culminates in a fight with a G-Clone device that is making copies of the real Curly, which will defend itself with a growing army of murderous Curly clones.

* The red flowers that turn mimigas into super strong monsters with [[TheBerserker no mercy or fear.]]

** One room in Grasstown has a bed with red flower petals scattered on the floor. Then a frenzied Mimiga [[JumpScare jumps out of the fireplace]].
* The broken robot you see right before the fight with The Core stands out (In particular, the obviously frantic command to retreat that they give before they short out for good), as does the Undead Core with his bloody faces (the big energy ball-spitting form especially) and Ballos' last form, with the corpses.

* Post-Waterway Mimiga Village, made worse by the music (''especially'' the enhanced re-release versions). The previously-cheerful village has been turned into a total GhostTown; the only intelligent life that shows up is Professor Booster if you fulfilled a particular [[GuideDangIt obscure requirement]] to keep him alive. The same BGM also plays in Santa's and Chaco's - now empty - houses.

** Once in Hell, you will learn of a wizard named Ballos who was loved by everyone he met... [[TooHappyToLive except]] his jealous king, who tortured him so severely that he - like the Doctor - lost control of his power and killed the king, his wife, his child, and almost everyone else he knew. After that, he went [[LaughingMad completely insane.]] Jenka, his equally powerful sister, couldn't bring herself to kill her own brother, so she sealed him away. Misery, his niece, forced Ballos to create the Demon Crown for her own benefit, only to be cursed to follow the dictates of its wearer. And while you are learning this, you fight against demons disguised as angels, robotic bombs, and a gigantic Press.
** After you learn the last bit of information, the ghost of a puppy informs you that the Demon Crown can only be destroyed permanently by killing Ballos. He asks you directly, to [[MercyKill kill his master.]] The final room, the Seal Chamber, is ''utterly filled'' with bones. In the middle of the room stands Ballos, who ''orders'' you to kill him... or he will kill you. As the fight progresses, the humanoid Ballos turns into a giant stone head, then generates eight smaller stones which turn out to be floating eyeballs, then, as his body begins to disintegrate ''[[http://archive.is/GRCBe screaming human faces are revealed inside the cracks of his body.]]'' And after you kill him, the voices of his victims are heard complaining about how hot it is as they try to crush you to death.

* The bad ending, achieved by talking to Kazuma in the Outer Wall and accepting his offer to [[ScrewThisImOuttaHere take you off the island to live a peaceful, isolated life with him]]. With you having left the conflict entirely, and Curly either dead or in an amnesiac state, there's nothing left to stop the Doctor from carrying out his plan of raising an army of killer Mimigas. Meanwhile, the screen cuts away to nothing and you're presented with a dialogue box reading "End?" as the haunting bad ending theme plays. [[YouBastard Congrats, you doomed the world by being a coward.]]

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