Timelines (A Doctor Who/Undertale crossover)
  • Reads 23,873
  • Votes 1,000
  • Parts 20
  • Time 1h 35m
  • Reads 23,873
  • Votes 1,000
  • Parts 20
  • Time 1h 35m
Complete, First published Jul 03, 2016
What happens when a human gets tired of resets? When the thrill of a genocide route becomes boring and mundane? This is exactly what happens to Frisk. They spent so much time going through reset after reset that now they are growing tired of it. However, little do they know that their next timeline will be one of the most interesting they've ever had. When Frisk resets after an incomplete genocide, it captures the attention of a certain alien Timelord called The Doctor. He has to travel between dimensions to investigate this strange anomaly, but ends up with an adventure much more strange than he had initially anticipated. This timeline is breaking. The entire reality is being torn apart and it's up to Frisk, Sans, and The Doctor to stop it.


(Disclaimer: I do not own Doctor Who or Undertale. The only thing I own is the plot line and the writing.)

Cover art by @GodOfChaos3900
All Rights Reserved
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Slide 1 of 10
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Determination (Sans X  Reader) cover
× [Sickness] × || Undertale Fanstory || The Gasters/Skeleton Family cover

Chainsmoker [ Gaster!Sans x Reader ]

15 parts Complete

Routine. The entirety of every living thing is dominated by it, human or monster. Everything HAS to be the same. It was in this that you were the exception. For you everything was new, every time line a detailed altered in order to satisfy your sadistic desire for a new ending, whether it be only a few details of dialogue altered or something else entirely. Monsters you once considered family you now butcher and slaughter without a second thought, after all, that's what the Reset is there for, right? And all at once it stops. Your small hold over the Underground is ripped away from you and you are thrown into a dying timeline, monsterkind's final attempt at self-preservation. You're alone, completely and utterly alone. Except one. And he has a bone to pick with you.