Nightmare Fuel / .hack

  • Everything about Cubia.
  • In the second cutscene of .Hack//OUTBREAK, Kite has a brief reunion with Mia, who has been with him for the last two volumes. However, she acts strange, has obscure dialogue ("we can go back and forth freely now," implying that she is going to become one of the Phases entering the real world and wreaking havoc) and makes gestures that imply that all is not well upstairs. And when Kite goes to touch her, she screams at him. Couple this with the accuracy of her English VA, as well as the extremely distorted textures of the current area and you have a scene that should not be watched with the lights out. Here's the scene, for those curious.
  • Skeith, followed by the rest of the Phases. To say that most fans won't forget their first real encounter with Skeith is an understatement, but everything gets worse from there.
    • To start with, Skeith only appears a couple times in Part 1 but each time is significant. From his Curbstomp Battle on Orca (a legendary player who can't even damage Skeith but hits him once for a Data Drain), to his finally catching Aura at the end of the part and promptly Data Draining her before spliting her into three fragments, this entity never speaks a single word, is downright ruthless and efficient and only ever makes noises when attacking while never once even touching the ground or walking. When people think of non-human antagonists for the franchise, Skeith is easily one of the first. And his title that becomes more prominent in the G.U. series? The Terror of Death.
    • The Phases are all as alien as can be. Skeith vaguely resembles a humanoid golem to a bare minimum, but the rest of the Phases are just plain freaky forms like walls, stained glass eyes and so forth, especially once Data Drained. Their mere introduction as a boss fight causes the entire game to part seas of static and corrupted data before they zoom straight up into your face and get a title card, unlike anything else in the game. And they're all devastatingly powerful, have Data Drain, and require to be Data Drained to be able to even hope to actually kill them.
    • At the end of Part 1, you triumph over Skeith, and feel some sense of accomplishment seeing as it was far and above anything else you've fought in the game up to that point. And then Kite has a rock fall on his head. He stares up, and all he can do is stare in sheer horror at the titantic behemoth of the aforementioned Cubia, beating heart of a core visible inside and a gigantic multi-eyed skeleton face as tendrils and vines grow out of its sides. The game doesn't even give you a chance to fight it; a single blast from its mouth, which alone causes the game to distort and corrupt, knocks Kite clean out from an indirect shot.
  • The sheer damage The World sustains over the course of the first generation games, and the corruption as a result. Corrupted areas have holes in the data that show the code beneath, Data Bugs can appear depending on the area or quest and become normal enemies in part 4, and there's always something off-putting about it all considering the circumstances. To top it off, corrupted areas occasionally hit you with a burst of static noise and the screen color inverting. You can even see large gaping holes in the skies of these areas, with nothing but eerie lines circling outside the cracks.
    • And this isn't even the worst of it. Thought you were making progress throughout Part 2 in stopping the corruption? The ending reveals the corruption is spreading to the hub towns and across the game now, CC Corp can't stop it, and destroying the Phases makes The World more and more unstable. Thankfully this just has the visual side-effects, but that means for the rest of the series those areas will always feel uneasy as a consequence.
    • However, while the corruption is more or less aesthetic in the game, it begins to outright screw with the real world; a scan of the news application in the Main Screen of the Operating System shows that The Phases and Cubia are gleefully doing targeted attacks on humanity like wrecking traffic lights, disabling power to large swathes of Tokyo (as seen in Liminality) and likely elsewhere, and even shutting the entire internet off for large spans of time. The implication is that the Phases are actively seeking to cause an Apocalypse How, possibly up to a Class 2.
  • The Net Slums. A uniquely corrupted area in its own right that is some of the in-universe remnants of The World's unused data, it's a hodgepodge of modern geometry that doesn't quite fit the game combined with assets of the fantasy setting, abnormal denizens which include having T Vs with emoticons for heads, and mismatched textures resulting in realistic human eyes on walls, or pixelated symbols in the middle of the normal ground. The somewhat-ambient music doesn't help at all, either. And the kicker to all of this? It's a hub town area you'll come back to numerous times and these problems never go away or get better. Although to some that might be Nightmare Retardant instead.