Game Theory
Game Theory

What IS Sans?!

August 10, 2026

AI Summary

5 min read

For years, the internet mocked MatPat’s infamous “Sans is Ness” theory. But with the release of Deltarune Chapter 5, the skeleton is back in the spotlight, and the evidence suggests the theorist might have been onto something far more specific than anyone realized—he just didn’t have all the pieces yet. The weird route of Deltarune, a hidden path where the player manipulates Noelle into becoming violent, has now delivered a sequence so short it skips entire chapters, yet so dense with meaning it may rewrite everything we thought we knew about Sans, Gaster, and the relationship between the two games.

The Weird Route and the Drowning

If you’ve been following the weird route since Chapter 2, Chapter 5 begins differently. Instead of waking up for the festival, Kris sleeps through it. Susie brings Kris to meet Noelle, who speaks with an unsettling new clarity. She says she has changed since her sister Dess disappeared, and that Kris has “shown her a new way”—the free will the player has been forcing upon her. Noelle takes Kris by the hand and says, “Let’s go somewhere no one has ever been before.” You select “proceed” again and again as they walk into a lake. The screen whites out. Kris and Noelle slowly drown. Then black text appears: “Insert Chapter 7, Side B.” That is the end. You skip both Chapter 5 and Chapter 6 entirely. No dark world, no Flowey.

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What you'll learn

  • 1 (00:02) **Sans’ Nest Theory Revisited** - The host reintroduces the infamous "Sans is Ness" theory from years ago, noting that Deltarune Chapter 5 now suggests MatPat may have been partially correct all along.
  • 2 (01:18) **The Weird Route Setup** - The host explains how the Weird Route began in Chapter 2 and continues through Chapter 5, involving the player forcing Noelle to become violent.
  • 3 (02:21) **Chapter 5 Weird Route: The Drowning** - The host describes the Weird Route’s brief but revealing sequence: Chris and Noelle walk into a lake and drown, skipping directly to Chapter 7.
  • 4 (03:29) **Sans’ Punch Card Drawing** - In the Weird Route, Sans is still at the festival and asks Susie to draw her friends on a punch card, a crucial interaction that is mandatory here but optional in the normal route.
  • 5 (04:42) **The Breadcrumb Gift** - Sans gives Chris a loaf of bread instead of ice cream, whose description says it "tends to leave crumbs wherever it goes," directly referencing Earthbound’s breadcrumb item.
  • 6 (05:38) **Evidence Sans is Not From Undertale** - The host compiles multiple pieces of evidence from Undertale showing Sans is an outsider.
  • 7 (06:26) **Musical and Memory Clues** - The host connects Sans’ theme song in Undertale, "It’s Raining Somewhere Else," to Deltarune’s "The Place Where It Rained," and notes Sans’ specific memories of Deltarune characters.

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Show Notes

MatPat was mocked for YEARS about his infamous “Sans is Ness” theory but…was he actually right?! Sans is back in the spotlight in Deltarune Chapter 5 and there’s a lot here that seems to imply that he may have been right all along…

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