Bad Brother

Series Metadata

Listing Series

• Atone and Survive by c00lsk3l3t0n95

  Fandoms: Undertale (Video Game)  

  • Mature
  • Graphic Depictions Of Violence
  • Gen
  • Work in Progress

  15 Sep 2026

  Tags

  • Graphic Depictions Of Violence
  • Papyrus & Sans (Undertale)
  • Papyrus (Undertale)
  • Sans (Undertale)
  • Undyne (Undertale)
  • Alphys (Undertale)
  • Asgore Dreemurr
  • Toriel (Undertale)
  • Flowey (Undertale)
  • W.D Gaster (mentioned)
  • Sans is a Bad Brother
  • Papyrus (Undertale) Needs a Hug
  • Younger Brother Papyrus (Undertale)
  • Papyrus (Undertale)-centric
  • Papyrus (Undertale) Knows More Than He Lets On
  • Sans is a Mess (Undertale)
  • Sans is Bad at Feelings (Undertale)
  • Sans is Having a Bad Time (Undertale)
  • This Is Why We Can't Have Nice Things
  • Papyrus is Having a Bad Time (Undertale)
  • Implied/Referenced Self-Harm
  • Suicide Attempt
  • Suicidal Thoughts
  • Papyrus is The Roaring Knight
  • It's not relevant but it's practically my calling card
  • Flowey (Undertale) Being an Asshole
  • Sans is Awful to Begin With
  • Mental Health Issues
  • W. D. Gaster is Papyrus and Sans' Parent
  • Scientist W. D. Gaster
  • W. D. Gaster Being An Asshole

  Summary

  Sans used to be sick of Papyrus, really, he did. But now things have gone too far, and he's not sure if he can make up for what he's done. Some things simply cannot be fixed.

  Inspired by @lafillehonteuse's Bad Brother AU on Tumblr.

  Series

  • Part 4 of Papyrus
  • Part 1 of Bad Brother

  Language:

  English

  Words:

  20,325

  Chapters:

  9/?

  Comments:

  72

  Kudos:

  108

  Bookmarks:

  19

  Hits:

  1,965

• Survival of the Greatest by c00lsk3l3t0n95

  Fandoms: Undertale (Video Game)  

  • Mature
  • Graphic Depictions Of Violence, Major Character Death
  • Gen
  • Work in Progress

  12 Sep 2026

  Tags

  • Graphic Depictions Of Violence
  • Major Character Death
  • Papyrus & Sans (Undertale)
  • Papyrus (Undertale)
  • Sans (Undertale)
  • Undyne (Undertale)
  • Alphys (Undertale)
  • Asgore Dreemurr
  • Toriel (Undertale)
  • Flowey (Undertale)
  • Papyrus (Undertale) Knows More Than He Lets On
  • Papyrus (Undertale) Needs a Hug
  • Younger Brother Papyrus (Undertale)
  • Papyrus is the Best (Undertale)
  • Papyrus (Undertale) Remembers Resets
  • W. D. Gaster is Papyrus and Sans' Parent
  • Sans (Undertale) Needs a Hug
  • Sans (Undertale) Remembers Resets
  • Kinda
  • Sans is Having a Bad Time (Undertale)
  • Sans has Nightmares (Undertale)
  • Sans is a Bad Brother
  • Sans is a good brother
  • Self-Harm
  • Suicidal Thoughts
  • Angst
  • And Lots of It
  • Angst and Hurt/Comfort
  • Papyrus is The Roaring Knight
  • Flowey (Undertale) Being an Asshole
  • W. D. Gaster Being An Asshole
  • This Is Why We Can't Have Nice Things
  • Papyrus Has a Bad Time (Undertale)
  • It's not relevant but it's practically my calling card
  • Self Confidence Issues
  • Alcohol Abuse/Alcoholism
  • Implied/Referenced Abuse

  Summary

  Sans lost the only thing that mattered, and has nothing left to live for. Nothing can bring him out of the endless suffering he has been trapped in- except, maybe, the broken machine in the basement.

  As it turns out, Sans is not the only one who needs saving from himself.

  Inspired by @lafillehonteuse's Bad Brother AU on Tumblr.

  Series

  • Part 2 of Bad Brother
  • Part 8 of Papyrus

  Language:

  English

  Words:

  16,618

  Chapters:

  6/?

  Comments:

  50

  Kudos:

  29

  Bookmarks:

  7

  Hits:

  670