Sans In Deltraune Might Be From Undertale... Deltarune Chapter 5 Theory - YouTube
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Sans appearing in Deltarune Chapter 5 has fans asking whether he's literally the same character from Undertale — or just a lookalike from a parallel world.
Multiverse TheoryNarrative IdentityParallel WorldsAuthorial Intent
Theory Briefing
- Sans is a recurring presence in Deltarune despite it being a separate game from Undertale, fueling debate about whether the two worlds are truly distinct.
- Deltarune's own lore hints that its characters may be alternate versions of Undertale's cast, making Sans's origin genuinely ambiguous.
- Chapter 5 fan theories are dissecting small details — dialogue, placement, behavior — to argue the Sans here crossed over rather than simply existing in parallel.
- The 'Weird Route' in Deltarune adds a darker layer, suggesting the game's world hides lore that complicates simple multiverse explanations.