1 - 20 of 39 Bookmarked Items in The Barrier (Undertale)
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Summary
(Shoutout to T. Mark, R. March, and C. Enthus, the original TLRYheads.)
The sun rises as it always does over the eastern sea. In the impoverished fishing village of Callocast, twins Kas and Isri watch the sky light up together, unaware that their lives are about to change. Twelve years ago, the powerful and beloved Red Mage was murdered by monsters. Since then, the Magescourt has searched for the next child with such powers. Today, a company of mages rides into Callocast. Today, Isri's red eyes guide the twins' fate down a different path.
Thrown into a world of status and luxury at the Magescourt, mage of kindness Kas is overjoyed to see their sibling finally step out of the shadows. But things among the mages are not what they seem. Tensions between monsters and humans are rising, and the shadow of war looms on the horizon. Can the twins change fate, or is monsterkind's story already set in stone?
(Fan-prequel to Undertale, mainly focusing on original characters.)
Series
- Part 1 of FUSEVERSE
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Bookmark Notes:
everything is so suspenseful I feel like I'm gonna die
5 stars, would recommend
#torshiragang4ever
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Summary
"Studying history sure is easy when you've lived through so much of it yourself!"
When the Barrier formed, it wasn't so easy for the Hammer of Justice.
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Two Steps To The Left, And a Long Fall by MimiIvory
Fandom: Bendy and the Ink Machine, Undertale (Video Game)
28 May 2024
Summary
My slightly alternate universes, but only those directly related to the Underground. Mostly bitter ones.
- Words:
- 106,948
- Works:
- 54
- Bookmarks:
- 35
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Summary
The monsters had not been expecting the humans to attack. They were easily overwhelmed, forced back into the fallen city beneath the mountain.
A single skeleton child, separated from his family, finds himself lost in human lands instead.
And a single human child, trying to escape her own species, finds that the abandoned city she was living in is still, in fact, claimed territory.
Series
- Part 1 of My Undertale Backlog
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Bookmark Notes:
:DDD
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Temporal Fenestra by aenor_llelo, Alderous, ConcoctionsFromHell, CryptkeeperKain, izziel_galaxy, Jaybird314, translunaryAnimus
Fandoms: Undertale (Video Game)
16 Nov 2024
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Summary
Temporal
1. relating to worldly as opposed to spiritual affairs; secular.
2. relating to time.
3. of or situated in the temples of the head.Fenestra
1. a small natural hole or opening, especially in a bone.
2. an artificial opening.Temporal Fenestra
1. openings in the temporal region of the skull of some amniotes, behind the orbit (eye socket).
2. artificial time windows.By complete accident, Sans discovers he's in a time loop. Entirely on purpose, he tells some guy named Papyrus. Despite himself, Papyrus wakes up every morning to meet a stranger named Sans for the first time.
Series
- Part 1 of Echtratale
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- Words:
- 1,645,199
- Works:
- 15
- Bookmarks:
- 30
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Bookmark Notes:
?
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0
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DELTATALE: UNDERRUNE by J88888888
Fandoms: Undertale (Video Game), Deltarune (Video Game)
21 Sep 2025
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Summary
the fun gang get dropped into random spots in undertale
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Bookmark Notes:
Nice start, add kerdly.
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Bookmark Notes:
Chapter 2
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Summary
UNDERTALE worldbuilding project/sort-of-AU: mages and magic, Long Days, arson, politics, history, the like. All works understandable standalone.
In release order:
1. The Last Red Year -- takes place during the human-monster war. Centered on original characters.
2. Songs for the Fallen -- takes place during the events of Undertale, with some changes due to there not being a player. Centered on Frisk and Chara.
3. TBA -- more Mage-era stories, postcanon SFTF sequel, etc...?In chronological/timeline order:
1. The Last Red Year
2. Songs for the FallenPlans:
- Paper Trails: backstory on TLRY's High Mage Mirei
- Starkeeper: backstory on Caris, the first Red Mage in ancient times
- TBN oneshot collection post-SFTF
- Encore for the Undead: set 10ish years after the end of SFTF.- Words:
- 425,429
- Works:
- 2
- Bookmarks:
- 8
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Bookmark Notes:
The most amazing fic ever writting my god
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A Small Act Of Kindness(not really, it was actually quite important) by 3chovine
Fandoms: Undertale (Video Game)
27 Sep 2025
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Summary
Error breaks the Barrier.
Y'know, cause he's a good person now. And might as well use his human soul collection for something.Series
- Part 1 of DoodleVoid
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Bookmark Notes:
A Small Act Of Kindness(not really, it was actually quite important)
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Summary
They didn’t really understand it, at first; what happened, what the barrier meant. They were just a kid, after all, but they knew that everyone needed as much help as they could get. They spent their time, the first few days, doing odd jobs for monsters who were too injured or old to do themselves.
It wasn’t until almost a week later that it all finally sunk in.
Series
- Part 1 of Far Away, Standing Near
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Bookmark Notes:
fuck I love this
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The Long Series: Version 2 - The Origin Anthology by Aria Breuer (Aria_Breuer), Aria_Breuer, Frodo the Poet (Aria_Breuer), The Long Series (Aria_Breuer)
Fandom: 10th Kingdom (TV), A Christmas Carol - Charles Dickens, A Series of Unfortunate Events (2004), A Series of Unfortunate Events - Lemony Snicket, A Very Potter Musical Series - Team StarKid, Age of Wonders (Video Games), Ala ad-Din | Aladdin (Fairy Tale), Aladdin (2019), Aladdin (Cartoon 1994), Aladdin (Disney Animated Movies), Ancient Greek Religion & Lore, Aquaman (Movies - Wan), Avengers Cast Reads New Thanos Children's Book - Jimmy Kimmel Sketch, Boy Meets World (TV 1993), Brave (2012), Bridge to Terabithia (2007), Bridge to Terabithia - Katherine Paterson, Casper (1995), Cats - Andrew Lloyd Webber, Christopher Robin (2018), Chronicles of Narnia (Movies), Chronicles of Narnia - All Media Types, Chronicles of Narnia - C. S. Lewis, Cinderella - Rodgers/Hammerstein/Beane, Clue (1985), DCU, Dinotopia (TV), Dinotopia - James Gurney, Dirk Gently's Holistic Detective Agency (TV 2016), Disney Fairies | Tinker Bell (Movies), Disney Princesses, Doctor Who, Ella Enchanted (2004), Ella Enchanted - Gail Carson Levine, Eragon (2006), Even Stevens (TV), Fairy Tales & Related Fandoms, Fantastic Four (Movies 2005-2007), Frozen (Disney Movies), Galavant (TV), George and the Dragon (2004), Ghost Ship (2002), Gone With the Wind (1939), Gone With the Wind - All Media Types, Gone With the Wind - Margaret Mitchell, Harry Potter - J. K. Rowling, Haunted Mansion (Disney Parks Attraction), Hercules (1997), Hocus Pocus (Movies), Hunger Games Series - All Media Types, Hunger Games Trilogy - Suzanne Collins, Khal Drogo's Ghost Dojo - SNL Sketch, Kubo and the Two Strings (2016), Lilo & Stitch (Disney Animated Movies), Little Red Riding Hood (Fairy Tale), Little Red Riding Hood - All Media Types, Make Mine Music (1946), Maleficent (Disney Movies), Marvel Cinematic Universe, Merlin (1998), Moana (Disney Animated Movies), Monty Python and the Holy Grail (1975), Norse Religion & Lore, Nußknacker und Mausekönig | Nutcracker and the Mouse King - E. T. A. Hoffmann, Once Upon a Time (TV), Outlander (TV), Outlander Series - Diana Gabaldon, Oz - L. Frank Baum, Peter Pan & Related Fandoms, Peter Pan (2003), Peter Pan (Disney Animated Movies), Peter Pan - J. M. Barrie, Phantom of the Opera (2004), Pirates of the Caribbean (Movies), Princess Bride (1987), Ratatouille (2007), Red Riding Hood (2011), Shannara Series - Terry Brooks, Sleeping Beauty (1959), Snedronningen | The Snow Queen - Hans Christian Andersen, Snow Queen (2002), Star Trek: Alternate Original Series (Movies), Star Wars - All Media Types, Star Wars Legends: Knights of the Old Republic (Video Games), Star Wars Legends: The Old Republic (Video Game), Star Wars Legends: The Old Republic Series - Drew Karpyshyn & Paul S. Kemp & Sean Williams, Star Wars Prequel Trilogy, Star Wars Sequel Trilogy, Star Wars: The Clone Wars (2008) - All Media Types, The Golden Compass (2007), The Haunted Mansion (2003), The Haunting (1999), The Haunting of Hill House - Shirley Jackson, The Hobbit (Jackson Movies), The Hobbit - All Media Types, The Hobbit - J. R. R. Tolkien, The Hunger Games (Movies), The Inheritance Cycle - Christopher Paolini, The Lion King (Movies 1994 1998 2004), The Lord of the Rings (Jackson Movies), The Lord of the Rings (Movies), The Lord of the Rings - All Media Types, The Lord of the Rings - J. R. R. Tolkien, The Nutcracker and the Four Realms (2018), The Secret of Moonacre (2008), The Shannara Chronicles (TV), The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien, The Unicorn Chronicles - Bruce Coville, The Wizard of Oz & Related Fandoms, The Wizard Of Oz (1939), Thor (Movies), Toy Story (Movies), Transformers - All Media Types, Treasure Island - Robert Louis Stevenson, Treasure Planet (2002), Twilight (Movies), Twilight Series - Stephenie Meyer, Wicked - All Media Types, Winnie-the-Pooh (Disney Movies), Winnie-the-Pooh - A. A. Milne, X-Overs - Fandom
23 Sep 2025
Summary
The fourth main anthology for the Long Series: Version 2 fanfiction series.
- Words:
- 550,838
- Works:
- 56
- Bookmarks:
- 1
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Summary
I was recently going through my AO3 folder to see what I needed to clear up to get all my fanfic projects done, and I realized I had a whole bunch of short, complete Undertale projects that didn't get posted before my hyperfixation died.
Seemed like a waste not to post them, so, here you go! These aren't discarded failures either... these are stories I finished, was proud of, and planned on posting once, and then life got in the way.
Enjoy!
- Words:
- 69,942
- Works:
- 6
- Bookmarks:
- 4
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Bookmark Notes:
muah
a beautiful collection of sweet lil one shots that you should read now btw
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Summary
The first time Doctor W.D. Gaster takes S-01 to see the BARRIER.
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Summary
What if the humans were stuck Underground?
- Words:
- 6,362
- Works:
- 2
- Bookmarks:
- 7
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Bookmark Notes:
Woah, neat. Cool concept.
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Undead Tale by Artsy_Puppy
Fandom: Sonic the Hedgehog - All Media Types, Undertale (Video Game)
01 Apr 2022
Summary
After dozens of resets of abuse, genocide runs, tampering with the world itself, the timeline came to collapse, finally shattering as Chara, the fallen child, against all odds, absorbed the six human souls, and planned to use them to completely destroy the timeline once and for all.
But they were stopped.
A mysterious strange man prevented the end by Chara's hand, and trapped them in the Void in his place, forcefully erasing the timeline himself. A reset wouldn't be enough. A clean slate was needed.
But this would change everything. Frisk's entire being was shifted, everyone, minus Chara, had the previous timeline erased from their memories, and the timeframe, researcher in charge, and results of the DT Experiments were entirely changed to something worse, something much darker than the Amalgamates that came before.
It is here where Undead Tale picks up, and follows the stories of the many characters as they try to survive in this new apocalyptic scenario they find themselves in.
- Words:
- 133,942
- Works:
- 4
- Bookmarks:
- 3
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Summary
While working on the machine, Sans receives a text message from an unsaved number.
It first starts out on one slow night that quickly evolves into eagerly waiting for a message from this unknown person.
Sans is cautious but he can’t help but feel drawn to this person - Despite that he never had met them before.
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Bookmark Notes:
,
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Echtratale by aenor_llelo, Alderous, ConcoctionsFromHell, CryptkeeperKain, izziel_galaxy, Jaybird314, translunaryAnimus
Fandom: Undertale (Video Game)
16 Nov 2024
Summary
An Echtra or Echtrae (pl. Echtrai), is a type of pre-Christian Old Irish literature about a hero's adventures in the Otherworld or with otherworldly beings.
In which everything is exactly the same as regular Undertale if not for the fact this takes place in northern Ireland. It's exactly the same as Undertale! Except in a few key ways!
- Words:
- 45,210
- Works:
- 1
- Bookmarks:
- 6
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Summary
"Fuck, Sans... If you had killed this human the day you found her, we wouldn't be here..." Undyne whispered to him, filled with remorse and guilt.
She passed his hands behind his back, anti-magic handcuffs surrounding them. Checking their placing, she locked them.
Sans could not tell if she was hating him. Perhaps she was blaming herself, too. Perhaps everyone was feeling a little responsible. At least, he hoped so."Why did you do that?" she sighed, rhetorically.
"I did it out of love." Sans simply replied.
"That’s the stupidest excuse you could have chosen..."
•| ⊱❦⊰ |•
Corrupted by the Lust, monsters live a hell everyday, sex and immorality being a daily routine.
Sans is one of the most luxurious of them and then, the one who had always been the most disgusted by all of that. He lost hope. He lost will.One day, while going to this giant purple door, he found a package. A human baby. And strangely, Sans felt... at peace.
Now, Sans has something to protect from this world. And he is not going to give up, even when everyone seems to be against him. But it might be easier than he thought: it seems that this little girl can change hearts...
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Summary
While taking a walk with your cat, trickles of rain turn into a heavy downpour, forcing you to take shelter in a cave. You lose your cat in the darkness, and in a desperate attempt to find her, you slip and fall into the depths of the Underground. Can you and your cat survive the harsh elements, as well as the monsters of a lost race? Perhaps... things aren't so bad down here.
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hi
umhad an idea to make a fun little series where frisk is a cat
was going to be just frisk at first but on a whim I just added reader as well as made the plotline a bit darker
this is my first official work on ao3, but I have ideas for other works if this idea falls through or I just get bored of it
anyways feel free to leave tips or anything in the comments if u somehow find this series
enjoy <3
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Summary
Quartermaster Grillby has his hands full as the monsters lose the War. Babysitting an arrogant skeleton is the last thing he wants to do.