Game Theory: What IS Sans?!

Storyline (what the video claims happens / what’s being connected)

• The video frames Delta Rune Chapter 5’s “weird route” (Snow Grave route) as the missing key that makes earlier theories about Sans and “Sans’s nest” look more correct.
• In the weird route, Chapter 5 is effectively skipped:
  • The usual early festival event doesn’t happen.
  • Susie takes Chris to meet Noel, who is acting altered/changed since “death disappeared.”
  • Noel leads Chris to a lake edge, with repeated “proceed” selections, then Chris and Noel drown.
  • The game then abruptly ends the chapter with: “Insert chapter 7, side B.”
• The video’s core claim: the weird route’s events strongly imply how Sans, determination, and the timeline/locations of Undertale vs. Delta Rune connect.
• The video argues that Sans cannot be native to Undertale:
  • In Undertale, monsters don’t bleed, but Sans can bleed.
  • The video interprets Sans’s Undertale dialogue/song/behavior as pointing to an origin tied to Delta Rune / Gastra’s experiments rather than Undertale itself.
• The proposed grand theory:
  • Gastra ran experiments involving determination (and possibly the creation of “Goners”).
  • Delta Rune is part of that experimentation.
  • Chris and Noel gaining souls (human + monster souls) allows them to transcend toward an upper plane, plausibly ending up in Undertale (Chapter 7, side B).
  • Sans uses breadcrumbs to track or return to the experiment’s “repeatable” moment.

Gameplay highlights / route mechanics mentioned

• Weird route initiation (Chapter 2 onward):
  • Chris can pressure Noel toward violence using player choices.
  • Ongoing choices continue in later chapters.
  • A “Thank you” indicator appears as Noel changes.
• Chapter 5 weird-route sequence:
  • No festival: Chris sleeps instead.
  • Meet Noel via Susie because Noel wants to speak with Chris.
  • Noel guides Chris to a lake area.
  • Repeated “proceed” input while the screen whites out.
  • Instant transition after drowning: “Insert chapter 7, side B.”
  • The speaker notes this effectively skips Ch. 5 and Ch. 6 content.
• Sans interaction differences between routes:
  • In both routes, Sans has Suzie draw on a punch card.
  • Weird route: Susie draws only Susie, Chris, and Ralsei/Ray (the video uses “Ray”).
  • Normal route: Susie doesn’t specify; Noel being present implies Noel may be included too.
• Mandatory weird-route Sans moment vs. optional normal-route Sans moment:
  • The video states the weird-route interaction is mandatory, while the normal-route interaction is optional.

Strategies / key tips discussed

• No explicit “how to” strategy guide is provided for gameplay in the typical sense.
• The video emphasizes route-impacting choices:
  • To reach/continue the weird route, players must push Noel to become more violent starting in Chapter 2 and maintain that path in subsequent chapters.

Key “theory clues” and what they’re interpreted to mean

• Sans + Undertale “Don’t forget” / punch-card breadcrumbs
  • The video links the weird-route punch card drawing to an Undertale secret-lab drawing that says “Don’t forget.”
  • It argues Sans is keeping memory of the weird-route path to follow/repeat it.
• Bread vs. breadcrumbs mechanic
  • Sans gives bread instead of ice cream.
  • The video claims bread is intentionally symbolic of breadcrumbs, referencing an EarthBound mechanic where breadcrumbs enable teleport-style tracking (used as a metaphor for what Sans is doing).
• Music/location mismatch
  • Undertale dinner date song: “It’s Raining Somewhere Else”
  • Delta Rune Chapter 4 song: “The Place Where It Rained”
  • The video treats this as a strong music-driven connection between worlds/locations.
• Sans’s “new in town” claim
  • The video argues Sans is a skilled liar, so “new in town” is likely false.
  • It points out that Sans’s house in Delta Rune appears identical to Sans’s house in Undertale.
  • It also cites moments where Sans prevents Toriel from searching and mentions bread/weapon-like details (including Gaster Blaster shaped cues).
• Gastra / experiment framing

  • The video claims:

    • There’s a missing/hidden journal entry (Entry 17) translated as:

      darker, darker, yet darker … shadows cutting deeper … photon readings negative

    • The intro sequence / phone-in-dark-world noise resembles Gastra’s patterns.

    • A file name like “Goner Maker” plus Gastra’s theme suggests Gaster is involved directly.
      • Overall conclusion: Delta Rune is within Gastra’s experiment, with determination as the key variable.

“Gamers/sources featured”

• MatPat / Game Theory (referenced as “Matt Pat” / the Game Theory host)
• The video promotes merchandise sources: tdware dosstore (mentioned as a store name in the ad segment)
• Toby Fox (cited as the creator whose design/music choices are used as evidence)
• Undertale and Deltarune (game sources referenced throughout)