1 - 20 of 158 Works in Ecto-Tentacles (Undertale)

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  1. Tags
    Summary

    In a Multiverse where Ink and Error retire together after falling in love. Dream is now the new leader of the Star Sans and protector of the multiverse.

    With Error no longer a threat, Dream focuses his effort in pacifying the other big threat to the multiverse, his brother Nightmare. In an attempt to cure his brother of his curse of negativity, Dream uses a rather volatile serum from a rather lewd AU.

    How will this series of events play out? And how will the multiverse fair without Ink and Error?

    Relationships/Ships:
    Nightmare/Killer (Killermare)
    Error/Ink (ErrorInk)
    Underlust Papyton & Sansby

    Language:
    English
    Words:
    120,250
    Chapters:
    39/?
    Comments:
    305
    Kudos:
    499
    Bookmarks:
    49
    Hits:
    16965
  2. Tags
    Summary

    After securing a work placement at the CORE, you begin to fall ill to some mysterious disease. Unfortunately for you, your boss is W.D Gaster, and he has taken interest.

    Language:
    English
    Words:
    79,860
    Chapters:
    29/?
    Kudos:
    272
    Bookmarks:
    36
    Hits:
    5819
  3. Tags
    Summary

    ▶︎"HOPE is the only thing that can save you now."◀︎

    ▶︎They're monsters, sure, but they're your monsters.◀︎

    ▶︎DISCLAIMER: I don't own Undertale or any of it's AUs. However, I do own the plot this story takes.◀︎

    Language:
    English
    Words:
    13,942
    Chapters:
    18/?
    Comments:
    8
    Kudos:
    80
    Bookmarks:
    10
    Hits:
    1514
  4. Tags
    Summary

    A series of SFW + NSFW drabbles/oneshots relating to the Bad Sans Gang being gay and in love with each other.

    Language:
    English
    Words:
    18,796
    Chapters:
    31/?
    Comments:
    166
    Kudos:
    388
    Bookmarks:
    40
    Hits:
    8960
  5. Tags
    Summary

    Dark Fountains sealed and ancient malice dispersed, the heroes won the day. But the cost to them is clear, their sins crawling on their backs and the loss festering in what remains of their SOULs. As they struggle to recover from their wounds, with the strings of destiny lying limp in the past, they must choose for themselves who they are and who they want to be. Far from Hometown a lone human girl looking for humanity's lost history resolves to explore a mountain, and winds up thrust into the midst of a story long since over. Will her selflessness help to heal, or will her selfishness only cut deeper?

    A sequel set years ahead of the original Deltarune with many themes about gender, healthy (or not) relationships, and kink. Oh yeah it also has tons of hot monster [#$@!] with huge [pipis] and a lot of other [HYPERLINK BLOCKED]

    This is the 'all chapters in one story' version for people who prefer that. If you want to avoid certain kinks or w/e the series page can be found here: https://archiveofourown.org/series/2552605

    Language:
    English
    Words:
    333,021
    Chapters:
    22/?
    Comments:
    32
    Kudos:
    40
    Bookmarks:
    5
    Hits:
    7059
  6. Tags
    Summary

    People are going missing, and it turns out you're one of them.

    You wake up one day in the middle of a mad skeleton scientist's lab. You are his experiment. Problem is, he always gets what he wants.

    Language:
    English
    Words:
    41,112
    Chapters:
    17/?
    Kudos:
    196
    Bookmarks:
    24
    Hits:
    10635
  7. Tags
    Summary

    Life is funny like that, you sure didn't expect to pick up an injured skeleton off a back alley(both metaphorically and physically) only to be sent into a completely different universe with said skeleton and his brothers who seem to just hate you with a burning passion! What follows that? Well more skeletons of course! At first glance they seem like a perfect odd family but is a normal family usually filled with emotionally unstable, depressed, ptsd infested monsters who seriously need therapy and a brat energy check? NOPE ! and just when did you turn into a therapist?!

    Language:
    English
    Words:
    23,234
    Chapters:
    8/?
    Comments:
    32
    Kudos:
    209
    Bookmarks:
    56
    Hits:
    2839
  8. Tags
    Summary

    OC’s mementos is a collection of smuts, oneshots and fluffs all about my own Original characters.

    Sometimes I just feel the inspiration to write for them and these are what I end up with, I share them to hopeful give inspiration for others to write with the prompts they have.

    However, if you end up liking any of my OC’s and would like to request a lemon, fluff or oneshot with any of them. You may request them in the comments and if you’d like to see how they look join my SinMamaWorks Discord Server and just @ me I’ll share a picture of them once you have joined the server.

    Note: All rights reserved to me, all of the characters in this are my own original characters and stories. However, prompts and characters may be used if you have asked of my permission and applied credit where it is due.

    Making money off of my characters is strictly forbidden.

    Series
    Language:
    English
    Words:
    9,622
    Chapters:
    3/?
    Comments:
    8
    Kudos:
    5
    Bookmarks:
    3
    Hits:
    1422
  9. Tags
    Summary

    Classic Sans goes to sleep tired after a long day on the surface

    Unbeknownst to Classic until it's too late, Nightmare is waiting for him in his dreams

    No one can save him now

    Language:
    English
    Words:
    5,051
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    55
    Bookmarks:
    10
    Hits:
    704
  10. Tags
    Summary

    After a heated workout, Killer puts some juicy and thought provoking ideas in the horny Cross’ head. Right as their mate Nightmare (who has his female Ecto body on display) is working it in the gym.
    Needless to say, Cross can't wait until night falls to see if Killer words are true. Because it's his turn to sleep with his king.

    Language:
    English
    Words:
    7,056
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    159
    Bookmarks:
    20
    Hits:
    2003
  11. Tags
    Summary

    It's the day after Error's birthday, but the fun isn't over yet ~_^

    Series
    Language:
    English
    Words:
    473
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    31
    Bookmarks:
    1
    Hits:
    484
  12. Tags
    Summary

    A brief look into the months after you and Nightmare became official, and a longer look into your six-month anniversary.

    Thanks again to FlamingBiscuit for coming up with the idea of Mafia!Nightmare!

    This is directly connected to my story "Crescents and Coffee" but you don't have to read it to get this!

    ALSO ALMOST FORGOT! Thanks to Anjel-X for beta-ing this!!!!

    Series
    Language:
    English
    Words:
    2,685
    Chapters:
    1/1
    Comments:
    8
    Kudos:
    65
    Bookmarks:
    12
    Hits:
    766
  13. Tags
    Summary

    Error and Nightmare both have a fascination with the same human... you.

    You're aware that your world is nothing more than code, and it irks you, deep inside.

    Language:
    English
    Words:
    21,503
    Chapters:
    7/?
    Comments:
    91
    Kudos:
    597
    Bookmarks:
    97
    Hits:
    10839
  14. Tags
    Summary

    A strange skeleton you've never met before calms you down from a panic attack and you want to thank him. How do you do that? Sex. Duh.
    You weren't expecting to see him again. But you did. Which leads to more sex. Duh. But feelings eventually blossom forth and the entire thing becomes a mess.

    Language:
    English
    Words:
    3,263
    Chapters:
    1/?
    Comments:
    4
    Kudos:
    10
    Bookmarks:
    1
    Hits:
    112
  15. Tags
    Series
    Language:
    English
    Words:
    3,958
    Chapters:
    17/17
    Comments:
    6
    Kudos:
    40
    Bookmarks:
    4
    Hits:
    2712
  16. 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:
    112,887
    Chapters:
    25/?
    Comments:
    643
    Kudos:
    1415
    Bookmarks:
    288
    Hits:
    35310
  17. 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:
    26,106
    Chapters:
    21/?
    Comments:
    376
    Kudos:
    571
    Bookmarks:
    75
    Hits:
    13645
  18. Tags
    Summary

    Using my sisters account for crossmare week because I don’t have A03 and it’s taking forever to load.

    Crossmare smut and fluff, my second favourite ship. Soldier king dynamic oh god they’re both evil and in love. They’re not your average couple :)

    Language:
    English
    Words:
    4,612
    Chapters:
    3/3
    Comments:
    2
    Kudos:
    80
    Bookmarks:
    9
    Hits:
    1527
  19. Tags
    Summary

    Underswap Papyrus x Trans masc reader

    YN just turned 21 and to celebrate he took some friends out drinking, along the way they find a monster bar where YN meets a strange sexy skeleton.

    Language:
    English
    Words:
    3,423
    Chapters:
    4/?
    Comments:
    2
    Kudos:
    15
    Hits:
    249
  20. Tags
    Summary

    Outer just wanted his family to be safe- but at what cost?

    Language:
    English
    Words:
    18,422
    Chapters:
    5/?
    Comments:
    1
    Kudos:
    48
    Bookmarks:
    6
    Hits:
    1207

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