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  1. Tags
    Summary

    Dr. Sans Serif has been chosen to conduct an expedition to a newly discovered planet. There's a lot riding on this expedition; what Sans finds on this new planet could change the course of life on Earth.

    It’s a six week journey aboard a ship that is crewed largely by minimum risk offenders looking to trade labor for a commuted sentence that are kept in line by a group of soldiers led by Commander Red Gaster. At first the Commander seems to see Sans as nothing more than an assignment, someone he was charged with keeping out of harm’s way both aboard the ship and at their destination. But as they get to know each other, Sans is determined to win him over, though he needs to do it without losing focus on what he's come this far to achieve.

    Language:
    English
    Words:
    4,800
    Chapters:
    48/?
    Comments:
    495
    Kudos:
    164
    Bookmarks:
    15
    Hits:
    2759
  2. Tags
    Summary

    The light of the sun setting cast an eerie glow. Their world tinted red. They never did see the humans.

    Series
    Language:
    English
    Words:
    56,585
    Chapters:
    16/?
    Comments:
    52
    Kudos:
    80
    Bookmarks:
    13
    Hits:
    1400
  3. Tags
    Summary

    To most of the world, magic was a thing of legend. It was rampant in stories but didn't exist in reality. Hidden in the world, however, were monsters and mages, all safely shrouded in secrecy to keep "normalcy" preserved. Three years ago, the secret came out.

    Three years ago, Mount Ebott became a swirling vortex of energy that prevents most technology and magic from working. It opened up and monsters came onto the surface, which revealed those never sealed beneath the mountain and the humans with magical ability.

    Technically, Mount Ebott is super dangerous. You still jog there two times a week.

    Series
    Language:
    English
    Words:
    7,257
    Chapters:
    3/?
    Comments:
    14
    Kudos:
    31
    Bookmarks:
    8
    Hits:
    298
  4. Tags
    Summary

    You've worked with difficult people before, but...these skeletons were on a whole other level. If Undyne had warned you just how crazy they were, you probably wouldn't have agreed to help the queen in the first place.

    But due to unfortunate circumstances, Mt. Ebott was the safest place for you to be. And in order to stay, you had to join the Royal Guard.

    Now, with threats of war breaking out, you find yourself torn on whether or not you should help this mixed bag of good and evil monsters.

    But one thing was for sure...you'd sooner die than give up your newfound refuge. You were ready to fight and protect your home.

    And these skeletons didn't seem to understand that you were serious.

     

    An Undertale Reverse Harem Story.
    This fanfic is a fem reader insert.
    NOOO SMUT OR LEMON, just an emotional rollercoaster :)

    Language:
    English
    Words:
    4,690
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    24
    Bookmarks:
    6
    Hits:
    300
  5. Tags
    Summary

    Don’t let the title confuse you, everything here is canon to the series. Sans has just learned a disturbing truth. Frisk is becoming less stable by the minute. It picks up right after the last book.

    Series
    Language:
    English
    Words:
    11,094
    Chapters:
    29/29
    Comments:
    131
    Kudos:
    14
    Hits:
    457
  6. Tags
    Summary

    Born into a life of cruel subjugation and confinement, a young child discovers that a different kind of prison might just become her safe haven. But nothing is ever that simple. With a deadline looming and her troubles starting to pile up, a new friend with a lazy grin could be just what she needs right now.

    Language:
    English
    Words:
    193,193
    Chapters:
    79/?
    Comments:
    222
    Kudos:
    346
    Bookmarks:
    24
    Hits:
    8024
  7. Tags
    Summary

    Okay alternate story to my Nightmare Queen meets Nightmare King

    Vessel Forged of Void, Crown Gifted by Nightmares, and Stolen Light of Radiance.
    What do you get?
    A very annoyed Vessel who has to put up with a screaming banshee in the back of her head, the ghost of pst “Kings” piping in every time they want to say something, and the body of what was once the Lord of the Hunt. A body that very much wants to hunt despite living in the heart of a major city.
    And now skeletons are falling into her living room…
    This…
    This is fine…
    Right?

    Based on many Reader x Sans I have read, fics with a Twist

    Series
    Language:
    English
    Words:
    3,253
    Chapters:
    2/?
    Kudos:
    7
    Bookmarks:
    2
    Hits:
    83
  8. Tags
    Summary

    They were settling into life in their new home very well. Sans and Toriel were the best surrogate parents Frisk could ever ask for.

    One day while messing around with the crystal viewer, Sans and Frisk stumble across an old friend Sans had thought lost forever. Naturally, their rescue efforts don't go quite according to plan.

    Series
    Language:
    English
    Words:
    1,372
    Chapters:
    1/?
    Kudos:
    2
    Hits:
    7
  9. Tags
    Summary

    Frisk held within a cruel prison, experiences torture and sexual abuse, but soon after. Not completely broken. Chara, who appears within his desperate struggle for survival on the edges of life and death. Offering a deal, that comes with a heavy price.(Age 18 Frisk/male/Age 18 Chara/female with some futa parts.)

    Language:
    English
    Words:
    88,885
    Chapters:
    19/?
    Comments:
    3
    Kudos:
    36
    Bookmarks:
    3
    Hits:
    3762
  10. Tags
    Summary

    A year after the barrier fell, you a young psychology and part time lab worker at the college get a new professor/ coworker. A little yellow, shy, dinosaur monster. You two quickly become friends. She invites you out to meet her friend one day and it leads to a storm of events. And quite a bit of anger. Will you fall in love? Will your inquisitive minds questions be answered on souls and if you can use it to further psychology to help people. Or will a certain bone man try and stop you from furthering your field.

    Language:
    English
    Words:
    3,983
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    7
    Bookmarks:
    2
    Hits:
    51
  11. Tags
    Summary

    Unable to help themself (as much as they tried to curb any growing dependence), Kris stuck their finger between the bars of the cage to skim the Soul’s exterior. They felt the Soul’s diffidence, as if it was internally wondering, Are they mad at me?

    “That wasn’t nice, what you did to Noelle and Berdly today,” Kris said, assuming a voice like their mother giving a lecture. “I know we went back and redid it, but that doesn’t mean it didn’t happen, you know. That’s an hour in the cage, to think about what you’ve done.”

    (Takes place after the events of Chapter 2, but Kris creating a Dark Fountain isn't acknowledged, since we don't know where that's going to go. Also, the Vessel will name themself Goner.)

    Series
    Language:
    English
    Words:
    7,553
    Chapters:
    4/?
    Comments:
    31
    Kudos:
    217
    Bookmarks:
    13
    Hits:
    3595
  12. Tags
    Summary

    When the delinquent Susie doesn't show up for class all day nobody thinks too much about it. Their only friend however decides to investigate.

    Language:
    English
    Words:
    2,302
    Chapters:
    1/1
    Comments:
    7
    Kudos:
    15
    Bookmarks:
    1
    Hits:
    118
  13. Tags
    Summary

    Michael Ström was a big target. The biggest target Frisk had ever tried to steal from, actually. The minister of immigration publicly, and a billionaire owner of a computer company in his spare time. Oh, and had she mentioned he was incredibly hot? The paycheck was nothing to scoff at either.
    All this, of course, was Sans’ plan. Like a puppet on a string, he’d gotten her along to participate in his crew’s heist, despite being the only human on the team. He insisted on training her flirting skill and even resorted to kissing her whenever they had to teleport. He was enough to make her heart flutter dangerously, and she had to constantly remind herself of what was important: Though she was on their team, they were hiding a giant secret from her. She had a feeling it could be her downfall.
    She could under no circumstance let Sans distract her.
    So why was it so damn difficult?

    Language:
    English
    Words:
    83,244
    Chapters:
    16/?
    Comments:
    41
    Kudos:
    108
    Bookmarks:
    12
    Hits:
    2102
  14. Tags
    Summary

    There's a lot more to magic than meets the eye. In fact, despite monsters having only been locked away a little over 400 years ago, it seems that they (along with the human wizards) have been forgotten in their entirety. At the heart of this mystery are 8 young human adults. Though they appear entirely normal, not all is as it seems. This work is going up for a month to gauge interest.

    Language:
    English
    Words:
    1,535
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    7
    Bookmarks:
    3
    Hits:
    35
  15. Tags
    Summary

    The Fell brothers are on the surface and out of the hellhole they call home. Edge has a good job and friends and hobbies. Red is still the piece of shit he's always been, but now he has Sans, who despite his best efforts to hide it is the best thing that ever happened to him.

    If Red would stop making excuses and allow himself something good for once, he could actually be happy for the first time in his life. But maybe he's right that everything is temporary. After all, in a world where there's still an undeniable tension between monsters and humans and everything can reset at any time, is it even worth getting attached? Is being happy, even just for a little while, worth the pain that comes with it if everything he loves is lost?

    Language:
    English
    Words:
    71,593
    Chapters:
    26/30
    Comments:
    326
    Kudos:
    279
    Bookmarks:
    48
    Hits:
    6963
  16. Tags
    Summary

    “Buddy, you’ve played this game long enough. Ya know I can’t give ya a straight answer to that.” Their voice changed again, dripping: “The most we’re allowed to say is that the dreams I have given you have helped, have they not? You talked to Nightmare and things got better. Things are better now.”

    “And how do you know they’re better-?” Chronic was suddenly in front of him, crystalized pixelated unfocused voids of magic concentrated on him.

    “ You. Are. Better. You do not need to know of the worse circumstance. ” They snarled, and it seemed it was a sore spot, “ You have by far had the greatest life you could’ve imagined. Core has made you promises. They do not forget. They remember for a millennium.”

    “Then what about you? Do you make promises?”

    “ That I do… I promise you can trust me. ” They smiled, “Ya can trust me just like ya trust yaself.” A shadowy hand reached out, and Error shook it.

    (ROUGHLY 95+ CHAPTERS, PLOT/CHAPTER COUNT IS SUBJECT TO CHANGE)
    (Very slow burn fanfic, there's going to be a lot of sadness, but the happy moments are wholesome, although spread far and few.)

    (Trigger warnings in beginning notes of each chapter.)

    Series
    Language:
    English
    Words:
    121,058
    Chapters:
    78/?
    Comments:
    106
    Kudos:
    131
    Bookmarks:
    23
    Hits:
    5580
  17. Tags
    Summary

    "There is a prophecy. The Angel... The One Who Has Seen The Surface... They will return. And the underground will go empty."

    Frisk only had one goal, and that's to SAVE everyone. And that meant everyone. No matter how many RESETs it took.
    With all the determination she had in her SOUL, she would make that prophecy come true.

    “heh heh heh…i’m sorry, but i really gotta ask.” Sans opened his eyes, and there was nothing but blackness in them, accompanying his grim smile.

    "What kind of game do you think you're playing here, huh kid?"

    [Re-edited]

    Series
    Language:
    English
    Words:
    69,519
    Chapters:
    23/23
    Collections:
    1
    Comments:
    87
    Kudos:
    197
    Bookmarks:
    27
    Hits:
    6789
  18. Tags
    Summary

    After Frisk leaves the Underground taking all the human souls and killing Asgore, the underground becomes mostly a wasteland. Monsters dusting due to the core failing. Having to attach prosthetics to avoid magic leaking from their lost limbs. Sans and the other boss monsters begin to slowly lose hope, and their minds.

    After 5 human souls are collected, a set of frail twins fall from a height that should have killed them. They meet a creature who wants to help them reach the surface, only the children are better off down below then above. Or are they? Join Tet and Ares as they go through the underground encountering monster only told in myths. But who are the real monsters? Who knows, maybe these monsters were just the family the twins needed all along…

    Sorry, hi I’m new to this. Please be nice in the comments:) Criticism is fine. I’d love feedback from you all. I’ll upload a better summary once I get into the swing of things. This is my own original au in the works known as Machine-tale.

    Edit: yes I have made this a SANS X READER fic because god damn I love sans sm.

    Language:
    English
    Words:
    33,198
    Chapters:
    18/?
    Collections:
    1
    Comments:
    25
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    228
  19. Tags
    Summary

    Goodness.

    Why do people strive to be good?

    Is it because they wish to be good for goodness’ sake alone?

    Or, are they only good because they fear the punishment that might come as a result of acting otherwise?

    Moreover, if done out of fear, are those individuals truly good, or are they just pretending in order to protect themselves from recompense?

    It is too early to say with certainty, but it does make one wonder what would happen if an individual who'd been subjected to such rules was suddenly shed of them and allowed do to as they pleased without care.

    For example, if a subject(s) were placed into a situation where the concept of morality no longer applied, how would they behave in the face of this new information? What would happen, then? Would they attempt to retain their previous behavior held in conjunction with what was considered to be ‘ethical’ and have that helm their decisions, or would they seek out new pathways previously thought outside their reach and pursue their darkest desires without fear?

    For, as is commonly known, anyone can be a good person if they just try.

    Conversely, however…

    Anyone can be a bad person if they’re not careful.

    Language:
    English
    Words:
    25,109
    Chapters:
    4/?
    Comments:
    4
    Kudos:
    29
    Bookmarks:
    3
    Hits:
    691
  20. Tags
    Summary

    It’s done, after all these years, monster kind can finally be free of their prison in the underground. But not all is well. A specter from the past haunts Frisk, and only by learning to move on from the past that never was can they both find peace. Meanwhile, another specter haunts the world. A war is brewing once again between the ways of old, and the way of the future. Dreams of world revolution and a classless society reignite, and soon the world will be divided between those who wish for a brighter future, and those who cling desperately to their own past that never was. Soon, the recently emerged monsters will need to choose what role they will play in this conflict, and what their place will be in the world.

    Language:
    English
    Words:
    125,636
    Chapters:
    32/?
    Comments:
    64
    Kudos:
    57
    Bookmarks:
    6
    Hits:
    2665

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