History NightmareFuel / KingdomHeartsIII

* After the boss fight with Terra-Xehanort, Terra attempts to wrestle free from Xehanort's control, only for Xehanort to take back control and ensnare Ven, Aqua, and Sora with chains. He then proceeds to torture them a bit before deciding to kill them by dropping them from a great height. Thankfully The Guardian, who is revealed to have Terra's heart, saves them and with Sora's help, takes his body back for good.

* The whole epilogue is unsettling within the context of the series: Xehanort, {{the Chessmaster}} who's been pulling the strings since the first game, was being manipulated the whole time into starting a new Keyblade War in a plot to bring back [[AuthorityEqualsAsskicking the Foretellers]]; even though Xehanort has been foiled, ''that'' plan [[TheBadGuyWins went off without a hitch]]. And it was all planned by the Master of Masters's sixth apprentice, Luxu -- or, as we know him, '''[[BewareTheSillyOnes Xigbar]]'''.

** Adding to this, there is an interesting theme regarding the final bosses’ worlds within I,II and III. The first game’s final boss World, End Of The World is the equivalent of Hell with it’s inhabitants looking like fallen angels with bizarre autonomy and Ansem being the Devil, KH2, The World that Never Was represents Purgatory, the world devoid of life and the Nobodies not truly existing at all and Xemnas being a false god. KH3’s world shows the complete man, Master Xehanort trying to recreate the worlds and trying to attain godhood, nearly robbing everyone of their free will, to dictate their destiny.

It's a chapter based on a [[NightmareFuel/MonstersInc film about monsters scaring children]]. What'd you expect?

** Vanitas reveals that he manipulated Randall into helping him and the Unversed scare and traumatize children so he can gather their scream energy and reconstruct his heart. God knows what the Unversed were doing to those poor children. Remember: the Unversed are Vanitas's negative emotions made manifest, and only seek to cause pain and misery because it's all they know.

[[caption-width-right:350: Ready to face your fears...?]]

* The premise of the [[WesternAnimation/ToyStory Toy Box]]. Andy, his mom, and the rest of the toys have mysteriously disappeared, leaving only a select few (Woody, Buzz, the Army Men, the Little Green Men, Rex and Hamm) to fend off the Heartless constantly combing their master's room.

** Vanitas actually almost ''succeeds'' in his ploy to merge back together with Ventus during this part, easily incapacitating Sora and blasting Donald and Goofy away when the two attempt to shield Sora from Vanitas. After they are Donald and Goofy are really, really scared for him this time around, with their SayMyName and Goofy's loud gasp of horror while they can only watch as Sora gets disarmed and they're unable to do anything more to help him. If it hadn't been for Sully's sneak attack, it's possible Vanitas would have won at that moment.

** Vanitas actually almost ''succeeds'' in his ploy to merge back together with Ventus during this part, easily incapacitating Sora and blasting Donald and Goofy away when the two attempt to shield Sora from Vanitas. If it hadn't been for Sully's sneak attack, it's possible Vanitas would have won at that moment.

** The sheer level of destruction the Unversed cause on Monsters Inc. Several parts of the factory explode and catch on fire, which undoubtedly would have hurt or even killed other monsters had it been during work hours. And then you remember you're escorting Boo the entire time you're in this world, and it turns into straight-up AdultFear.

[[caption-width-right:350: All that's left in my heart is misery and despair... and now we can share it!]]

--->'''Mickey:''' What happened.
--->'''Aqua:''' You abandoned me, that's what. Left me in this shadow prison for more than a decade, knowing what it would do to me. I reached this shore after endless wandering. Waited forever for help to arrive. But no one ever came. I lost my Keyblade. Had no means of fighting my way back through the Heartless. You should have known I was stranded. Do you know how lonely it is here? How frightening it is to have no one? All that's left in my heart is misery and despair... and now we can share it!