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1. The Experiment by CreativePoptart

   Fandoms: Undertale (Video Game)  

   • Mature
   • Graphic Depictions Of Violence
   • F/M
   • Complete Work

   28 Oct 2021

   Tags

   • Graphic Depictions Of Violence
   • Papyrus/Original Undertale Character(s)
   • Papyrus (Undertale)/Reader
   • Papyrus (Undertale)/Original Female Character(s)
   • Papyrus & Reader
   • Papyrus (Undertale)
   • Sans (Undertale)
   • W. D. Gaster
   • Undyne (Undertale)
   • Original Undertale Character(s)
   • Reader
   • Alphys (Undertale)
   • Original Character(s)
   • Reader has a Description
   • Past Child Abuse
   • Past Abuse
   • Papyrus (Undertale) Knows More Than He Lets On
   • Violence
   • Post-Traumatic Stress Disorder - PTSD
   • Flashbacks
   • Alternate Universe - Soulmates
   • Soulmates
   • Emotional Hurt/Comfort
   • Soul Bond
   • Memories
   • Blood and Gore
   • Blood and Violence
   • Other Additional Tags to Be Added
   • Alternate Universe - Pre-Canon
   • Named Reader
   • Reader is named
   • Slow-ish burn
   • Minor Character Death
   • Non-Consensual Drug Use

   Summary

   A human has fallen into the Underground, there is nothing new there. This human, however, carries a rarity unseen by monsters ever before. Gaster is determined to find out what makes this human different than all the others, but his sons get swept up into the experiment he tries to carefully craft away from them.

   Language:

   English

   Words:

   138,378

   Chapters:

   50/50

   Comments:

   349

   Kudos:

   372

   Bookmarks:

   73

   Hits:

   10,211