In other fandoms, typically you've got your die-hard canon lovers, your fan-content creators and enjoyers, and your creepypasta fanatics. Undertale's lines for those blur substantially. What counts as a creepypasta? This may sound like a stupid question, but think about it. Let's take Killer as an example. The plot of his story is he was hacked by a player and forced to kill everyone he loves, and eventually (possibly) turns on the player and kills them. He even has the "bleeding eye" effect to seal the deal. In almost every other fandom, they would look at that and say it would qualify as a pasta, but with Undertale's original subject matter and fourth-wall breakage, we all look at him and go "Ah, Tuesday". I really don't think Something New qualifies as a creepypasta. But if not Something New, what about VHS? A Sans hacked by a player so they could get the Hacker's Ending, who has become angry, glitchy, vengeful, and has the ability (and desire) to trap the player in Undertale forever. Kinda similar idea -hacked character attempts revenge and probably succeed- but does VHS count as a pasta and Something New doesn't? What about Horrortale in comparison to The Mount Ebbott Tapes? I probably don't need to explain Horrortale, when the Human leaves the Underground, the CORE fails and everyone begins to starve, but the Tapes is a similar concept: The CORE suddenly explodes from failed experiment to break the barrier, causing people to starve and lose their magic, well before Frisk falls. It's told in the format of Analog Horror, whereas Horrortale is told through a comic. You could make a case that both Horrortale and the Tapes are pastas, but their stories are expressed very differently with varying tones. If anything, I'd even argue that Horrortale is just really dark, and not made to intentionally scare people, only build suspense. This is just something rolling around in the back of my mind for a while now and really have no succinct answer, but I figured I'd just pitch this out to the world to see if anyone else had an answer.