Every single character in Undertale is changed while still remaining in the same basic story in some which way or form. AUs that only affect some of the characters are not found here. AUs that change only during the time Frisk is in the underground are not found in this category.
All items (111)
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- Under(her)tail
- Underbeats
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- Undercooked
- Underfail
- Underfell
- Underfell (Kaitogirl)
- Underfell GG
- Underflub
- Underfoil
- Underforest
- UnderHeat
- UnderLove
- UnderMafia
- UnderMaze
- Underpants
- UnderRacer
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- Undertable
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- Undertale - No Mercy
- Undertale Rewritten by AI
- Undertale The Musical
- Undertale: PaperStory
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- Undertinge
- Undertomb
- UnderWAR
- UnderWorld
- Unofficial Underfell