Undertaletheory Stories

*** (Fem Frisk/Male Chara) For the first time in, what seems like, an eternity, the eighth and final necessary human has fallen into the Underground realm of Monster kin...

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#2

The reality behind Undertale by hangin'_with_Frosty

This is a JOKE. I want you all to understand that I did this out of sheer boredom and thought it was a cool idea. I wrote this to explain a theory I had; a theory that m...

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Undertale Theory (Spoilers!) by TobyRogers0

#3

Undertale Theory (Spoilers!)by BlueberryFaygos

This will be talking about the Undertale Theory I have recently come up with. Please enjoy!! and please no hate..

Completed

UnderTheory (My Undertale Storyline Theory) by datonecosplayer

#4

UnderTheory (My Undertale Storylin...by Sutayari

This is my Undertale theory of the whole storyline. I've read many au's and other theories and out of my favorites I have combined my favorite parts in each one to make...

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Why i believe Sans has killed fallen humans. (OLD) by Fanficgirlmaddy

#5

Why i believe Sans has killed fall...by MadMaddyGirl

okAY SO- um I'm sharing my headcanon/ theory on Sans undertale- i am taking this serious- so JFDKJFD

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5 Stories