1 - 20 of 122 Works in Ecto-Tentacles (Undertale)

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Listing Works

  1. Tags
    Summary

    Welcome one and all to your sanscest sinning needs!!!

    Language:
    English
    Words:
    951
    Chapters:
    1/?
    Kudos:
    10
    Bookmarks:
    3
    Hits:
    148
  2. Tags
    Summary

    Nightmare has had it just about up to hell with Dream and his allies keeping him from feasting upon negative AU's! Like any King though he comes up with a solution unfortunately for (Y/n) that solution involves her and the lives of several other innocent negative victims. She isn't going down without a fight though if negativity is what this tar faced megalomaniac wants he's about to get a lot of it! Him and his whole pack of murderous skeletons! Maybe she failed at life where she was, but here in this castle in god knows where she might actually be able to have a life here amongst these lunatics!

    Language:
    English
    Words:
    32,929
    Chapters:
    18/?
    Comments:
    170
    Kudos:
    240
    Bookmarks:
    45
    Hits:
    5086
  3. Tags
    Summary

    Subject Number-One is a failure. It’s useless until Doctor WingDings Gaster of UnderFell Found a use for him. Subject Number-Two will be everything that he and King Asgore wanted in a soldier.

    But Number-One isn’t enthusiastic about Number-Two, he doesn’t want to be replaced.

    Please look at End notes for extra details that also may have spoilers.

    Language:
    English
    Words:
    1,122
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    8
    Hits:
    234
  4. Tags
    Summary

    As a necromancer, you’re used to suspicious stares and whispers of heresy from the townsfolk. It only gets worse after you’re killed and walk Ebott Empire as an undead skeleton.
    When you hear rumors of a strange settlement that worships the undead, it’s too tempting to resist. The locals treat you better than you’ve ever been treated. That is, right up to the moment where you’re dressed up and tied to an altar as a sacrificial bride for their skeleton gods.
    Despite their advanced technology and magical prowess, you’re doubtful of their divinity. What kind of gods blush whenever they see a bit of bone?

    Language:
    English
    Words:
    77,858
    Chapters:
    17/?
    Comments:
    401
    Kudos:
    951
    Bookmarks:
    184
    Hits:
    17833
  5. Tags
    Summary

    So had this idea for a multiship / Undetale AU harem story thing. XD
    I didn't see many stories that have polly ships as an option, and it's mostly the boys fighting over reader ect. So yeah, of course, polly won't be for all the boys but I do feel like some would be at least open to it.
    So yeah being a switch / gender fluid / polly / flirtyasshole this fic is completely self indulgent and no I'm not ashamed. -u-
    Going to be having a bunch of Sans's and Papyrus's and some of them will already be involved with each other.
    There will be sin, with probably every Sans and Paps we see. >.>; Because I'm a slut and want to fuck all the boys.
    Will probably add more tags and that later. X3

    Language:
    English
    Words:
    17,750
    Chapters:
    7/?
    Comments:
    55
    Kudos:
    127
    Bookmarks:
    25
    Hits:
    1968
  6. Tags
    Summary

    You are heir to a very successful family, very well known, well liked, fair, and deadly. You do not bend to no one. However that strong will will end up being your downfall when you bring unwanted attention to yourself .

    that's all I'm telling youz...otherwise it will give way for spoilers...the less you know the better. suckers.

    Language:
    English
    Words:
    32,700
    Chapters:
    10/?
    Comments:
    93
    Kudos:
    110
    Bookmarks:
    18
    Hits:
    2827
  7. Tags
    Summary

    Nightmare is more than just a bad guy. He and his poly protect others, too. Maybe they can help Blue out of a bad situation.

    Series
    Language:
    English
    Words:
    11,865
    Chapters:
    9/?
    Comments:
    157
    Kudos:
    272
    Bookmarks:
    44
    Hits:
    4754
  8. Tags
    Summary

    Did Sans intend to get attached to you, much like you did him? There's strong evidence that he's fond of you. He called your flesh pretty. What base is that for imposters?

    Series
    Language:
    English
    Words:
    1,431
    Chapters:
    1/1
    Comments:
    8
    Kudos:
    61
    Bookmarks:
    2
    Hits:
    415
  9. Tags
    Series
    Language:
    English
    Words:
    1,236
    Chapters:
    2/?
    Kudos:
    5
    Hits:
    217
  10. Tags
    Summary

    Just a bunch of random ship oneshots

    Series
    Language:
    English
    Words:
    68,407
    Chapters:
    95/500
    Kudos:
    41
    Bookmarks:
    1
    Hits:
    2026
  11. Tags
    Summary

    A figure emerges. You know this 'crewmate.' A fella named Sans you'd sometimes accompany. He'd used you as an alibi, and now you've outlived your usefulness. If only you'd just stayed home and gone into space agriculture instead. Space farmers make a peaceful living these days.

    The ketchup drinking hadn't bothered you, but the tentacles coming out of his back are giving you the heebie-jeebies.

    Series
    Language:
    English
    Words:
    1,423
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    45
    Bookmarks:
    4
    Hits:
    317
  12. Tags
    Summary

    His mate was now his, as Blue was now Horror's. Nestled away in his domain, where he had all he wanted.

    Until Cross's appearance, leading to events upending his existence once again. Settling with this outcome unexpected. How truly interesting, such darkest dreams coming to fruition.

    Language:
    English
    Words:
    3,867
    Chapters:
    2/2
    Comments:
    6
    Kudos:
    54
    Bookmarks:
    10
    Hits:
    843
  13. Tags
    Summary

    Sans caught a human and not it's time to question you

    Series
    Language:
    English
    Words:
    2,937
    Chapters:
    1/1
    Comments:
    7
    Kudos:
    53
    Bookmarks:
    3
    Hits:
    1063
  14. Tags
    Summary

    Failure. Reset. Failure. Reset. Failure. Reset.

    This time, you fall into the Underground weeks before the 'Eighth' Human child arrives. But you’re not a child. And not many monsters expected to see an adult human in the Underground... not even Sans. You definitely aren’t supposed to be here.... or maybe you are? Maybe you’re the anomaly that can finally stop this endless cycle of resets?

    Or maybe you'll just get stuck in it with the rest of them.

     

    The story is told through the second person. This was done to keep the story's POV similar to the game's POV.

    Language:
    English
    Words:
    36,473
    Chapters:
    16/?
    Collections:
    4
    Comments:
    166
    Kudos:
    612
    Bookmarks:
    112
    Hits:
    7354
  15. Tags
    Summary

    Nightmare has found something very interesting. Unfortunately, his biggest annoyance has found him. Maybe there's some common ground, though...

    Series
    Language:
    English
    Words:
    1,517
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    34
    Bookmarks:
    3
    Hits:
    602
  16. Tags
    Summary

    Cross learns how to feast like a real mer-shark while being courted into the shiver.

    [Based on Skumhuu's Leviathan AU]

    Series
    Language:
    English
    Words:
    3,339
    Chapters:
    1/1
    Comments:
    17
    Kudos:
    286
    Bookmarks:
    37
    Hits:
    1785
  17. Tags
    Summary

    Red is a breeder for the Impostors, an alien race whose main goal is to create chaos and destroy other races while rebuilding their own. He happens upon a set of ships, sending his once-normal life into a spiral of uncertainty and...l...l...love?

    I mean, after he gets them all to fuck him, of course.

    Language:
    English
    Words:
    4,517
    Chapters:
    2/?
    Comments:
    14
    Kudos:
    50
    Bookmarks:
    15
    Hits:
    749
  18. Tags
    Summary

    Asgore is entering an depressive episode and Gaster starts worrying about his friend

    Language:
    English
    Words:
    1,765
    Chapters:
    1/1
    Kudos:
    4
    Hits:
    139
  19. Tags
    Summary

    Mermaids are the social butterflies of the sea, living in sunny, shallow water together with the rest of their school. On the other end of the spectrum, meroctopuses are violent, antisocial fucks who like the cold and the dark, and who basically kill any competing predator they see.

    But they aren’t stupid.

    Red is proof of that, using his traps to hunt for food and saving his energy to ward off predators. So, how does he react when he finds the laziest creature in the ocean stealing his catch?

    Bribe him with more food in exchange for peaceful company, of course! The ocean is fucking lonely for giant predatory mer!

    Red unwittingly gets saved by those peaceful conversations. Apparently even a cold-hearted predator can fall in love. And from there, their family keeps growing as more lost souls are saved by the siren’s call that sings of peace, love, and family, no matter how terrible of a monster you were in the past.

    Language:
    English
    Words:
    135,054
    Chapters:
    46/?
    Collections:
    1
    Comments:
    1413
    Kudos:
    1181
    Bookmarks:
    202
    Hits:
    23337
  20. Tags
    Summary

    Time to get those bones. >;D

    Seriously though, I can't believe I made it through this year to do this again! Now that I'm a little more organized, I can tell you that this is going to be a collection of hot garbage smut involving only Reader-insertXCannon pairings.

    If that's your cup of tea, jump on in. A quick warning, as I forgot to mention, there's gonna be some dark smut fics this year. I'll mark them out at the beginning, so please, pay attention to the tags and the author's notes. Thanks ^^

    Language:
    English
    Words:
    117,972
    Chapters:
    31/31
    Comments:
    343
    Kudos:
    813
    Bookmarks:
    90
    Hits:
    31777

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