Game Theory: What IS Sans?! - YouTube
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Sans resurfaces in Deltarune Chapter 5 with details that reopen the biggest unsolved question in Undertale fandom: what actually is he?
Narrative TheoryUnreliable NarratorIntertextualityAuthorial Intent
Theory Briefing
- Deltarune Chapter 5 brings Sans back into focus, reigniting debate over his true nature and origins first raised in Undertale.
- A prior theory about Sans is put back on the table, with new in-game details apparently lending it fresh credibility.
- The video argues the new chapter contains specific implications about Sans that change how players should read earlier story beats.
- Sans remains one of gaming's most dissected characters precisely because the games deliberately leave his backstory unresolved.