Every Single Undertale AU That Ever Existed!

Welp. Here it is. Took me about 6 months to find all these AU's and I'm pretty sure this is all of them. If there are any I missed just let me know and I'll add them to the following list:

AU Count: 2025

123 Slaughter Me Tale

5Nd3Rtr011

A Child And A God

A Great British Swap

A Great British Tale

A High Tale Of Quality Rips

A Mirrored Reality

A Mixed Timeline

A Parallel Timeline

A Pirate’s Boot

A Reality Of A Tale

A Retarded Universe

A Retarded Universe + Storyspin

A Retarded Universe + Underswap

A Shift In Fate

A Shift In Quality

A Swap In Quality

A Swapped Tale

A Tale Of Candy

A Tale Of Eric Fans

A Tale Of Quality

AI-Tale (Lugmillord)

ALTERATION

Abandoned Au

Abysstale

Acidtale

Acidtale (Acis!Sans)

Adjusted Anomalies

Admintale

Adven!Tale

Adventureswap

Adventuretale

Adventuretwist

Aerotale

Aethertale

Afterdeath

Afterfell

Afterswap

Aftertale

Aftertale (Geno!Sans)

Age-Swap

Age’s End

Aircrafttale

Akintale

Akumatale

Aladdin AU/Crossover

Alimagtale

Alone Together

Alphaswitch

Alphatale

Alterblend

Altered Destiny

Altered Fate

Altered Forums

Altered Toad

Alterfell

Alterground

Alternate Alter

Alternate Reality

Alternate Universe Police

Alterrevert

Altershift

Altersmash

Altersmashswap

Altersponge

Alterswap

Altertale

Altertale (1: Pastelaine)

Altertale (2: Friisans)

Altertoad

Altertwist

Amalgamate!Asriel

Amalgatale

Amalgemate

Amazingswap

Amazingtale

Amnesiatale

Amongtale

An Extended Universe

An Icy Echo

An Omnic’s Crisis

An Underground Subspace

An Urban City Story

Anatomical Anachronisms/Asgore's Wars, Within, Without

Ancienttale

Angel-Tale

Angeltale

Angryfell

Angryswap

Angrytale

Angsttale

Ania(Skeleton) By @Ania-Da-Peasant

Animated Horrors

Animatedtale

Anime And Cartoon Tale

Animetale

Animutale

Anofftale

Anomalytale

Anti-Error

Anti-Physicstale

Antitale

Antivirus!Sans

Anurtale

AnxietyTale

Apathytale

Apathytube

Applefell

Apptale

Arabiantale

Arachnotale

Arcadetale

Arena Tale

Aristtale

Arrowtale

Arsonfell

Arttale

Asdftale

Ashtale

Ask Drunk Chara

AskFriskAndCompany

Asriel Universe

Assets Sans

Astertale

Astraltale

Astraytale

Asylumtale

Atale

Atramentoustale

Attorneytale

Au Tournament

Auratale

Aurumtale

Auswap/Ourswap

Autale (2: Dr. Orb)

Autale/Ourtale

Author Sans

Autumntale

Autumntwist

Avalontale

Aviantale

Awakeningtale

BRILAGES DUSTTALE

Baby Bird

Baby Blasters

Babybones

Babytale (Baby!Sans)

Badoc

Badtimetale

Bakingtale

Bakutale

Balancetale

Barrier Blocks

Bazookaswap

Beartale

Beatlestale

Beetale

Beggartale

Begintale

Belieftale

Bendytale

Beneath The Battlefield

Berktale

Berrytale

Between Two Voids

Beyond The Stars (Más Allá De Las Estrellas)

Beyondtale

Bikertale (Light Nsfw Content)

Bill!Sans

Binatytale

Biotale/ Biotale Infinite

Birdtale

Blackgoo!Sans

Blanktale (Blank!Frisk?)

Blendertale

Blendtale

Blighttale

Blind Frisk

Blind!Frisk

Blindtale

Bloodtale

Blookytale

Bloxtale

Blue Star Tale

Bluerosetale

Bluetale

Bone Bunny (Talli, Swappi, Felli, Swalli, Fellippi, Aphrodii, Cellibbii, Taffetti)

Bonepunk

Bordertale

Bossmonsterbani

Boxtale

Brassberry

Break To Pieces

Breaking Barrier

Broalgamate

Broken Logic

Brokentale

Brokentale (1: Hummingkitten)

Bromalgamate

Brotale

Brothertale

Builders Down Below

Bunkertale

Burstale

Buttontale

C-Ma!Sans

CRINGE!underswap (previously "FR!underswap")

Calcium Man

Calmtale

Canadtale

Cancerswap

Cancertale

Cancertale + Underswap - CancerSwap

Candy'stale

Candyfell

Candyswap

Candytale

Cantale

Canvastale

Captivetale

Cardtale

Cartoontale

Casinotale

Cattale

Cavetale

Cctale

Celestialtale

Chain!Tale

ChanceTale

Changed Distortions

Changed Fate

Changetale

Chaostale

Chapterturn

Chara!Sans

Charatale

Charatale (1: Chica-The-Chicken101)

Charatale (2: Craftingchic)

Charise

Chasriel

Cheftale

Chessswap

Chesstale

Chiletale

Chill

Chisk

Choice

Chord Chronicles

Christmas Party

Chromotale

Chronictale

Chronotale

Cinnamontale

Classic!Underfell

Classical Chronicles

Classictale

Classictwist

Clickertale

Clocktale

Clockworktale

Close Relations

Cloudtale

Cloudy Misfortunes

Clustergem!Sans

Clustertale

Coalescetale

Codetale

Coldsea

Coldtale

Collateral Damage

Collegetale

Colortale

Comatale

Combined Hopes And Dreams

Comic Papyrus

Commentarytale

Concepttale

Conqueredtale

Conscience Sanses: Angel And Devil

Constellationtale

Contaminationtale

Controltale

Cookietale

Cool!Papyrus

Copy_Tale_

Core!Frisk

Core!Gaster (Out of Control) +Cg!Sans

Core!Sans

Core!Tale

Coretale/Technotale

Corrupt Beast Sans

Corruptedswap

Corruptedtale

Corruptionfile.Ut

Corruptiontale

Countrytale

Cowboytale

Cputale

Craftfell

Craftlust

Craftshift

Craftswap

Crafttale

Craptale

Crashswap

Crashtale

Creamysweetale

Creative Tale

Creative!Tale

Creepvine

Creepytale

Creepytale (1: Karma2U)

Creepytale (2: Lupus-Tontrue)

Cross!Fell Sans

Cross-Under

Crossed Out

Crossovertale

Crosstale

Crosstale (1: Polishcrossoverfan)

Crowded Garden

Crusadetale

Cryptotale

Crystal Cove

Crystalsoul!Tale

Crystaltale

Crytale

Crytale (Molly Font)

Cstc

Cubetale

Cupswap

Cuptale

Cursedtale

Cutietale

Cybertale

Cybertale (Cyborg!Sans?)

Cyborgtale

Cycletale

Cykashift

Dadster

Daemontale

Daintyshift

Daintyswap

Daintytale

Dancelust

Dancetale

Dark Cream

Darkertale

Darktale

Darktale (1: Pokegirl151)

Darktale (2: Jessa33)

Datale

Datatale

Dave Minecraft: Trapped

Dctale

Deadtale

Deepertale

Deeptale

Default

Deitytale

Deja VU Tale

Delfinotale

Deltarune Titans

Demitale

Demontale

Depressiontale

Depresstale

Despondenttale

Desserttale

Destiny!Sans

Destroyed Indie Titles

Destroyed Realities

Detectivetale

Deteriortale

Determination Gas

Deviantart Sans

Devianttale

Deviltale

Devoidtale

Differentfell

Differentopic

Differentshift

Differentswap

Differenttopic

Differtale

Digitale

Digitale (1: Nabuco88)

Digitale (2: Serac111)

Disbelief Asriel (Storyshift)

Disbelief Carl Johnson (Universes Collide

Disbelief Papyrus

Disbelief Papyrus (Epictale)

Disbelief Papyrus (Errortale)

Disbelief Papyrus (Genocide Run)

Disbelief Papyrus (Hard Mode)

Disbelief Papyrus (Interchangedtale)

Disbelief Papyrus (Inverted Fate)

Disbelief Papyrus (Negativetale)

Disbelief Papyrus (Outertale)

Disbelief Papyrus (Overtale)

Disbelief Papyrus (Underfell)

Disbelief Papyrus (Underfresh)

Disbelief Papyrus (Undernight)

Disbelief Papyrus (Undershuffle)

Disbelief Papyrus (Underworld)

Disbelief Sans (Swapfell)

Disbelief Sans (Underswap)

Disbelief Spongebob (Spongetale)

Disbelief Ultra!Papyrus

Disclosure

Discord Between Worlds

Discordtale

Disharmony

Disillusionmenttale

Disneytale

Disneyxdtale

Displaced Fable

Displacedtale

Dissoctale

Distale

Distempertale

Distortale

Distrust

Diverge

Divergentorigins

Dividetale

Dolltale

Domestictale

Donít Hug Me Iím Determined

Doodletale

Doomedtale

Doomtale

Dotishtale

Dr. Underdote

Dragontale

Draky!Sans

Dramatale

Dreadtale

DreamSwap

Dreamcraft

Dreamlifetale

Dreamtale (1: Ttobii)

Dreamtale (2: Paranoidfluff)

Dreamtale (3: Jokublog)

Dreamtale (Dream and Nightmare)

Dreamworkstale

Dreemur Reborn

Dreemurr Reborn

Driftingtale

Drugtale

Drunk!Sans

Dubsteptale

Dundertale

Dusktale

DustDust

DustShiftFell/DustFellShift

DustSwap: Scarlet Flare

DustSwap: The Butterfly Effect

Dustbelief Papyrus

Dustcraft

Dustfell

Dustjar

Dustmetal

Dustsponge/Spongedust

Dustswap

Dustswap: Frustation and Collapse

Dusttale

Dusttale (Murder!Sans & Phantom!Papyrus)

Dusttale: Last Genocide

Dusttrust

Dümmchentale/Dummietale

Earthbound

Earthtale

Echoeddreams

Echofell

Echotale

Eclipsetale

Ecto!Sans

Eddstale

Egypttale

Electrictale

Electrotale

Element-Tale

Elementale

Elementaletale (2: Hawkmask101)

Elementaltale (1: Reyindee)

Elementtale

Embodiment Of Undertale

Emoswap

Emotale

Emotiontale

Emptytale

Enchantedtale

Endertale

Endtale

Enemyswap

Enemytale

Engietale

Ennucediafell

Ennucediatale

Epictale

Epictale (Epic!Sans)

Epochtale

Equationtale

Equilibriumtale

Errorcraft

Errorcrashedtale

Errortale

Errortale (Error!Sans)

Erzahlentale

Essencetale

Everyrune

Ex Sans

Execation

Executive

Exetale (Made By Me!)

Exitium

Experiment-Undertale.Exe

Extended Reality

F-Zerotale

FNAF: THA

Fable Of The Gamers

Fable of Nostalgic Spirits

Fableflip

Fablefluke

Fabletilt

Fabletilt (Discontinued?)

Fableturn

Fabletwist

Fae U

Failtale

Fairytale

Faithtale

Faketale

Fallen Children

Fallen Souls

Fallendowntale

Fallentale

Fallouttale

Fallunder

Familiar!Sans

Familiartale

Families Trapped In Quahog

Familytale

Fan-Charactale

Fantasytale

Fatal Error

Fatal_Error

Fataltale

Fatetale

Fearstale

Feartale

FellFell

FelledFell

Fellspin

Fellswap

Fellwolves

Feraltale @Feral-Tale-Au

Fightstory

Figmentale

Figmented Reality

File Loaded

File-1

Finntale

Five Nights Of Undertale Aus

Five Nights at Sanís

Flaretale

Flipflopped

Flipformed

Flipside Sans

Flower Sans

Flowerfell

Flowey Is Not A Good Life Coach

Flowey Possession

Floweypot

Floweytale

Flowriel

Flufffell

Flufftale

Fluffy Fire (Fifi!Sans)

Fnaftale

Fonttale

Foodtale

Forestale

Forgivenesstale

Forgotten Au

Formtale

Forsakentale

Fortresstale

Foundabove ?

Foundationtale

Foundlingtale

Foundlingtale (Hybrid!Frisk) (Droptale)

Foxpy and BB (Bunny Blue?)

Fracturetail

Freaktale

Freddyspin

Freddytale

Fredtale

Freshswap

Freshtale (Fresh!Sans)

Frettale

Friendlytale

Friendship And Determination

Friendshiptale

Friendstale

Frisk's Anomalous Adventures

Fruittale

Fucked Up Realites

Fullmetal Undertale

Fushiontale

Fusiontale

Futuretale

Galactic Corruptions

Gallerytale

Gamechanger

Gamertale

Gamertale (Gamer!Sans?)

Gametale

Gangtale

Gargoyletale

Garnettale

Gashtale

Gaster!Sans (Rockabilly) (Echotale?)

Gasterblaster!Sans

Gasterfell

Gastertale

Gastertale: Sixbones

Gemfell

Gemshift

Gemswap

Gemtale

Gemtale + Alterswap

Genderbend: Sixbones

Genderbendtale/Gbtale/Genderbend

Genderswap

Gendertale

Generationtale

Genietale

Genocide!Grillby / Nomercy!Grillby

Genocide!Swap

Gentale

Geometrytale

Ghost/Blook!Frisk (Frisk Is A Ghost)

Glasstale

Glitchtale

Gloomtale

Gloomytale

Glowingtale

Godverse

Goffictale

Gooptale

Goopysoul

Goopytale

Goretale

Goth!Sans

Gothamtale

Grandtale

Grandtendo's Tale

Graphictale

Gravity Falls: Weirdmageddon's Rise

Gravitytale

Greektale

Grouptale

Guardiantale

Guardtale

Guildtale

Gz!Hospital

Gztale

Hacker!Frisk

Half-Hearted Dreamers

Halfswap

Hamiltontale

Handplates

Handplates​

Hangingtale

Happytale

Hardtale

Haremtale

Harmonic Disfunctions

Harsh Realites

Harsh Realities

Harvesttale

Harvesttale: Undersoul Parade

Hauntedtale

Have We Gone Too Far?

Haventale

Heart And Soldier

Heartfell

Hearts of Horses

Heartswap

Hearttale

HeavenTale

Heavenfell

Heavenlytale

Hedgetale

Hellsiblings

Hellspawntraveler

Helltale

Helltale (1: Thegeneralofsouls34)

Help_Stabilized

Help_Tale: Sixbones

Help_tale

Helptale

Hiddentale

Hiddenunder

High Quality Tale

Hikaritale

History Recast

Hiyatale

Hocotale

Hollowtale

Holographic Horrors

Holotale

Homeland (Fableworld?)

Homestuck

Hometale

Homocide

Hopelesstale

Horizontale

Horror!Ink

Horrorshift

Horrorswap

Horrortale

Horrortale (1: Unknown)

Horrortale (2: Sour-Apple-Studios)

Horrortoonswap

Hostiletale

Human!Safety

Human!Underfell

Human!Undertale

HumanTale

Humanitytale

Hungertale

Huniesans

Huntertale

Hybridtale

Hymmnetale

Hypertale

Hyrbitale

INSANITY RENEWED

Ibtale

Icarlytale

Icecreamtale

Icetale

Icytale

Iinverted Uniiverse

Illuminatitale

Imaginationtale

Immortaltale

Impaired

In A Flash

Incredibletale

Indietale

Infecttale

Inferno!Sans

Infinitytale

Injectiontale

Inkswap!Papyrus

Inktale (Ink!Sans)

Inktale/Inksans

Inky's Secret Lab

Innocent!Chara

Innotale

Insanity!Tale

Inseromortus (Plants Vs Zombies)

Insomnia

Inspiretale

Inspiritale

Integritale (The Story of the Integrity Soul)

Interchangedfell

Interchangedtale

Interchangedtale Revision

Into The Stars

Inversetale

Inverted Fate

Inverted Fell

Inverted Shift

Inverted Wonder

Invertoad/Invertoad Fate

Ipseitytale

Itís a Snow Poff - Fluffy Characters Made Even Fluffier, Literally

Jaegertale

Jalizatale

Jaspertale

Jazztale

Jerrytale

Jeweltale

Jollytale

Joseontale

Judgement Hall

Judgement Hall > Face Every Character

Judgement Hall > Face Every Sans

Jumbletale

Jurassictale

Just A Head

Justicetale

Kaijutale

Katanatale

Killer!Sans

Kindertale

Kindred Spirits

King Papyrus

Kingdomtale

Kingdomtale (1: Deaths-Wonderland)

Kingdomtale (2: Ashlex-In-Pearl)

Kirbytale

Kittentale

Kitty!Sans and Pupyrus

Knights of the SOUL

Kurotale

Kyuubi!Sans

Lantern AU (Lantern Day?)

Lanterntale

Lastchange

Lasttale

Lateshift

Lavendertowntale

Lazyalter

Lazybones

Lazyswap

Lazytale

Left_Under_Alone

Leftshift

Legandstale

Legendtale

Lennytale

Lessertale

Letter!Sans

Liamtale

Librarytale

Life On The Surface

Lifelesstale

Light-Tale

Lightless-Tale

Lightningtale

Lilí Skelebros

Limbotale

Linetale

Littletale

Logansense

Loganshift

Loganswap

Logantale

Lolitale

Lollipoptale

Lomandotale

Lonelytale

Looptale

Lost Vessel

Lost_Tale

Loudtale

Lovetale

Lucktale

Luminous Depths

Lunartale

Lunatale

MLP_egtale

Mad-Hattertale

Maddtale

Madmanstale

Madnesstale

Mafiatale

Magic!Girl Frisk

Magiciantale

Magictale

Magmatale

Mahoutale

Maidtale (Moderate Nsfw Content)

Mainswitch

Majesticfell

Majestictale

Majoratale (1: Smieska + Owlyjules)

Manatale

Maniatale

Mapletale

Marbletale\Underhornets

Mario & Luigi: A Koopa Tale

Mario And Luigi: After Laughter

Marioshift

Marioswap

Mariotale

Marketale

Marsformed

Martialtale

Martialtale (1: Jellijelatin)

Marveltale

Masktale

Matryoshkatale

Mazetale

McGeetale

Mechatale

Medievaltale

Megatale

Melodic Dissonance

Melodytale

Memoryfell

Memoryswitch

Memotale

Mercyplates (Handplates Sub-Au)

Mercytale

Messtale

Meta - Rambling About Game Mechanics, Mostly - Zarla-S.tumblr

Metallictale

Mettasansey

Mettatale

Mettaton's Legs AU

Midswap

Miloswap

Mimikkyu Sans

Minecraft + Ink

Mineraltale

MinionTale

Minorinterchangeddiffershift

Minortale

Mirrored Destiny

Mirrors Change

Mirrortale

Misery - Zarla-S.tumblr

Missingtale

Mixed In The Coding

Mixedtale

Mixedtale(Fell,Swap,Corrupted),

Mixmatch

Mobiustale

Mobtale

Mobtale / UT Mob

Modified Motivations

Modtale

Modtwist

Moltendreams!AU

Momma Cq, Kid!Fresh, Kid!Geno and Kid!Error

Momplates (Handplates Sub-Au)

Monofell

Monotale

Monsieur!Sans

Monster Girl Tale

Monster In The Mirror

Monster Mix

Monster!Frisk

Monstertale

Mood-Swings

Morbidtale

Morphtale

Mortytale

Mountaintale

Multiversal Anomalies

Muppet Tail

Murdertale

Musical Tale

Musicaltale

Mutanttale

Mylenahoodtale

Mystictale

Mytale

Mythicaltale

Mythitale

Mythtale

N!Bloxtale

Nagatale

Nationtale

Nativetale

Naturefell

Natureswap

Naturetale

Needlessly Complicated Sans

Negatale

NegativeTale

Nekotale

Neon!Sans

Neptunia X Undertale: The Saving Heart

Nether!Sans

Nevermore

Nevertale

Newtale

Newyorktale

Nextale

Nexttale

Nexustale

Nightale

Nightingtale

Nightmaretale

Nightmareterrortale

Nights Unwinded

Ninjatale

Nintendotale

Nobodytale

Nolifetale

Nononono_Tale

Nootnoottale

Nostalgiatale

Not A Tale

Notalea

Novaistale

Nyandertale

Nzttale

Occulttale

Oceantale

Octale

Octale (1: Askmesnekvince)

Octale (2: Byehelena)

Octale (3: Nicothekiller123)

Odderswap

Oddertale

Oddtale

Of Monsters Of Undertale

Offtale (1: Lesssess + Mbdprojects1234)

Offtale (2)

Omotale

Once Again

Oncetale

One By One

One In A Million

One Small Dream

Operation Tundra Eel

Oppositale

Opposite Pages

Opposite Seas

Oppositetale

Oppositetale (1:Kellenkyo)

Orchidtale

Ore!Tale

Oreotale

Orphantale (1: Princessmistymire + Thelunarprincess15)

Orphantale (2: Mysticteadancer)

Other Kingdoms

Other Story

Othertale

Othertale (Color!Sans)

Otherworld

Out Of Tune

Outerfell

Outerhorror

Outershift

Outersponge

Outerspongeswap

Outerswap

Outerswapfell

Outertale

Outertuber

Overbound

Overdosed

Overgarde

Overtale

Overtime

Overture

Overwar

Overworld

PTA

Paint-Thinner!Sans

Painted Plummet

Pallette!Sans

Paperjam

Papertale

Papertale (1: Mr-Pengu1N)

Papya!Sans

Papyrus's Belief

Paraversetale (Asterisk/ Gaster)

Partypoopertale

Partytale

Pastaswap

Pastatale

Pastrytale

Pasttale

Patrontale

Pelotale

Personalitytale

Personatale

Persontale

Petale

Petaltale

Petrifying Educations

Phoenixtale

Phototale

Picarto Sans

Pickle Realites

Pinoytale

Piratetale

Pitchtale

Pixeltale

Pjís Daycare

Plaguetale

Planetale

Plantale

Play-Timetale

Playbacktale

Playertale

Plundertale

Plushtale

Pmdtale

Pockettale

Poketale

Pokèsponge

Pokètale (1)

Pokètale (2)

Pokésponge

Pokétale

Policetale

Polterswap

Poltertale

PolyStation Chronicles

Ponyshift

Ponyspin

Ponytale

Ponytale (1)

Popstartale

Poptale

Portale

Portertale

Portutale

Positale

Possessedtale

Possibilitytale

PotatoTale

Powdertale

Power of Eight

Powertale

Predator

Predatortale

Pretendtale

Pretertale

Primeval

Primus!Underfell

Prismtale

Pro!Sans

Protecttale

Prphecytale

Psychotale

Pta Undertale

Pumpkintale

Pun-Tale

Puppettale

Purereverse

Pureswap

Puretale

Purgatale

Puritale

Qarms/Qarmic Sans

Quantamtale

Quantumtale (Tk!Sans?)

Quintilliontale

Ragnartale

Rainbowtale

Rainbowtale (1: Kirbypuff326)

Rainbowtale (2: Misakimagic)

Random Sans

Random Shift

Randomized Realities

Randomized Selections

Randomshift

Randomspin

Randomswap

Randomtale

Re-Mixtale

Reality Check

Reapertale (Reaper!Sans)

Reapertale And Reverse Reapertale

Rebirthtale

Reborntale

Reefertale

Reflectiontale

Refusetale

Regency

Regulartale

Reincarnatale

Rememberance

Remembrancetale

Remnantale

Reptale

Researchtale

Reset!Frisk

Resettale

Restorefell

Reveltale

Reversaltale

Reversed Rotation

RevertFell

Reverted Timeline

Revertshift

Revertswap

Reverttale

Reverttoad

Revisedswap

Revoltale

Rewind

Rewindtale

Rhythmtale

Rippertale

Riptale

Risetale

Risingtale

Rivertale

Roamfell

Roamswap

Roamtale

Robosponge

Rocktale

Rodeotale

Roleshift

Roleswap

Rosstale

Rotationtale

Royal Babybones

Royal Souls

Royaltyswap

Royaltytale

Ruins!Au

Russiantale

Rwbytale

RyanFell

RyanSwap

RyanTale

SG!Dustbelief

SMPtale

Sa: Grounded

Sadtale

Sailor!Sans

Saintale

Sakuratale

Sametale

San's Ssd

Sanfristale

Sanrisk

Sans Hazard (Hazard!Gaster)

Sans the Game

Sanstale

Santa!Asgore

Savagetale

Save Point Sans

Save!Sans

Savedtale

Savefell

Savetale

Sbtale

Scartale

Scholatale

Science Sans

Scientist!Sans

Scooby Too: Mysteries Underground

Scorched Tale

Scorchedswap

Scorchtale

Scramble Saga

Scramblespin

Scrambletale

Searchtale

Seasontale

Seatale

Secondtale

Securitale

Seektale

Self Incoporatetale

Sempiternitytale

Sensespin

Sensespin: Sixbones

Sensetale

Sentinaltale

Seperatedtale

Seraphim!Sans

Seventhtale

Sewtale

Sexy!Sans

Shadow!Sans

Shadowfallen

Shadowtale

Shadowtale (1)

Shadowtale (2)

Shadtale

Shaken Fiction

Shapetale

Shattered!Dream

ShatteredDreamsAU (Galacii)

Shatteredtale

Shattertale

Sheltertale

Sherlocktale

Shiannesetale

Shifted Alter

Shiftfell/ Fell Shift

Shifts of the Nintendo Characters

Shiftshuffle

Shiftswap

Shifttoad

Shiningtale

Shiptale

Showtale

Shredtale

Shufflefable

Shuffleshift

Shuffletale

Shytale

Siblingtale

Siivafell

Siivamemberstale

Siivatale

Silvatale

Simstale

Simulatale

Simulated Confessions

Singtale

Sintale

Sistertale

Sithtale

Sixbones

Sixwires

Skele-Frisk

Skeletale (1: Sbreece)

Sketchtale

Skulltale

Skypetale

Skytale

Sleeplessfell

Sleepy!Sans

Slendertale

Smashshift

Smashswap

Smashtale

Sminglestory

Snailtale

Socktale

Solacetale

Solar Sans And Lunar Sans

Soltale

Solvefable

Something New

Something's Missing

Sondertale

Sonic Adventure: Grounded

Sonic Timeswap

Sonic: Tale Of The Emeralds

Sonictale

Sorcerytale

Sorrowtale (Sorrow!Sans)

Sorrytale (1: Ressurectednightmare)

Sorrytale (2: Dragonartstudios)

Souldust Crusaders

Soulfell

Soulless

Soullesstale

Soulswap

Soulswaptale

Soultale

Soultale (1: Burning-Sol)

Soultale (2: Multimugen)

Soultale (3: Thepeng101)

Soundfighttale

Soundtale

Soviettale

Spacegem!Tale (Is This a Diff One From Just Below?)

Spacegemtale

Spacetale

Spadetale

Spanishtale

Spectretale

Speedtale

Spelltale

Spidertale

Spilled Coffee Tale

Spin Of Music Makers

Spinspin

Spinswap

Spiraltale

Spiriatale

Spiritale

Splattale

Splintertale

Splitpersonalitale

Splitsides

Spongechange

Spongefell

Spongeflip

Spongeshuffle

Spongespin

Spongespinshift

Spongeswapfell

Spongeswapshift

Spongetale

Spongetale: Deformity

Spongetwist

Spongetwistswap

Sponge’s End

Spookytale

Sportstale

Spritersflip

Spritersswap

Spriterstale

Spritertale

Spun Educations

Spunswap

Srpelotale

Star Swapped

Starfall

Stargoat

Starstale

Startale

Statictale

Steamtale

Steven's Tale

Stigmatale

StoneSleep!AU

Story Switcher

Storybook

Storydoubleshift

Storyshift

Storyshift: Sixbones

Storyspin

Storyswap

Storytwist

Stoyshifted/Shifted Realities

Strange Placements

Strange/\Tale

Stranger Tales

Stratostale

Striketale

Stringtale

Stroyswap

Studiotale

Stylishtale

Subject 52

Sudden Changes

Sugartale

Suicidal Blueberry

Sundzyshift

Sundzytale

Sunshinetale

Super Monster Ball

Super Sebastian

Super Underkart

Superherotale

Superswaptale

Superswitch

Surfaced Bones

Surfacefell

Surfacetale

Surftale

Survivealtale

Survivortale

Swantale

Swap Of An Adapted Story

Swap!Starfall

SwapOut

Swapchanger

Swapdertale

Swapfable

Swapfell

Swapfell Of Music Makers

Swaplight

Swapped Animated Films

Swapped Collisions

Swapped Depths

Swapped Educations

Swapped End

Swapped Lies

Swapped Paint

Swapped Realities

Swaps Of The C.L.O.U.D.

Swapshift

Swapspin

Swapswap

Swaptale

Swap’nshift

Swervedtale

Switch-A-Roo Story

Switched Down

Switched Spotlight

Switched Up

Switchedtale

Switchtale

Swordtale

Symphonytale

Tale From Below

Tale Mix

Tale Of An Adapted Story

Tale Of Gensokyo

Tale Of Music Makers

Tale Of The Broadcasting Station

Tale Of The Elements

Tale Of The Instigation Time

Tale Of The Objects

Tale Of Two Races

Tale's End

TaleTurn

Taleflip

Talemix

Tales From The C.I.T.A.D.E.L.

Tales From The Literature Club

Tales Of Being Redundant

Tales Of Emptiness

Tales Of The C.L.O.U.D.

Tales Of The C.OR.D.S

Tales Of The Cereal

Tales Of The Flash Smashers

Tales Of The Nintendo Characters

Tales Of The Plants And Zombies

Tales Of The Random Characters

Tales of Yet Another Self Insert

Taleshift

Taletwist

Tale’s End

Tanaloktale

Tanktale

Tantamount

Tatatale

Teatale

Techcybertale

Technotale

Temmietale

Temtale

Terrafell

Terraformed

Terrortale

Thaumatale

The Amazing Tale Of Elmore

The Betrayal Run

The Blooming Of Monster Kind

The Caretaker of the Ruins

The Core Helper

The Crystal Caverns

The Demon And The Angel

The Fable Of Nostalgic Spirits

The Fall Of The Souls

The Fallen Knight

The Frenchiest Fry

The Green Soul In The Underground

The Heros Of Underground

The Lost Sibling

The Mythical Crew

The Purpose

The Skellaton Au

The Story of Erratum

The Subterranean Emissary

The Swap of Two Brothers

The Swapped Show Below

The Tale Of Animated Films

The Tale Of Sodor

The Tale of a Twisted Curse

The Thought

The Thought (Omega!Sans)

The Towering Forces

The True Godverse

The True Hero

Thompson's Tales Of The Underground

Three Brothers

Threetale

Thrifttale

Thundertale

Ticktock!Sans

Tidaltale

Tidetale

Tim3Less

Time!Sans

Timeline Sans

Timelinetale

Timeswapped

Timetale

Toadshift

Toadspin

Toadswap

Toadtail

Toddlerfell

Toontale

Toontwist

Toptale

Toriel!Chara

Toucan!Sans

Touhoutale

Toxictale

Trainertale

Traitortale

Transitiontale

Trashtale

Traveltale

Treetale

Tribaltale

Trickstertale

Trickstervirus

Triotale

Tropictale

True Chaostale

Truetale

Truth Sans And Ideal Papyrus

Trypotale

Tubershift

Tubershiftswap

Tuberspin

Tuberswap/Swaptube

Tubertale

Tubertale Type 2

Tubetale

Tumblr!Sans/Techno!Sansmo

Tumblrtwist

Tundletar

Turned Tables

Turned Tales

Turnedswivel

Twilighttale

Twin Runes

Twintale

Twirling Incidentally

Twisted Strings

Twisted Tales Of The C.L.O.U.D

Twistedsmash

Twistedtale

Twistedtale (1: Blazepandora)

Twistedtale (2: Sansylovely)

Twixttale (Calibri and Verdana)

Two Fallen Siblings

UDR!Underswap

UNDERTALE: BREAK YOUR SOUL

Ultimatale

Ultraswap

Ultratale

Umbratale

Und_Rt_Le

Under Story

Under The Depths Of The Internet

Under(The)Throne

Under-Band

UnderHat

UnderLove

Under_Myshelter

Under_Pray

Underarctic

Underbed

Underbend

Underblade

Underblood

Underborn

Underbot

Underbound

Undercafe

Undercamp

Underchange

Underchanged

Undercharged

Underchaser

Underchild

Underchild (Chimetale)

Underchill

Underchosis

Undercloud

Undercode

Undercollection

Undercolor

Undercontamination

Undercontrol

Undercorpse

Undercourt

Undercove

Undercraft

Undercrap

Undercritical

Undercross

Undercurrent

Undercurse

Undercute

Underdanger

Underdark

Underdark (1: Deathwithundertale)

Underdarkness

Underdeath

Underdecay

Underdeepsea

Underding

Underdog

Underdread

Underdream

Underdreerium

Underdust

Undereldritch

Underelectricity

Underemix (1)

Underemix (2)

Underette

Underfaerie

Underfail

Underfairy

Underfallen

Underfallen (1)

Underfallen (2)

Underfalls

Underfalls/Gravitytale/Gravitale

Underfalse

Underfame

Underfamily

Underfates

Underfates (1: Sonicgirl313)

Underfates (2: Sparkybytes)

Underfeels

Underfell

Underfell: Sixbones

Underferal

Underfight Club

Underfilm

Underflesh

Underflip

Underflood

Underfloop

Underflurry

Underforce

Underfresh

Undergale

Undergallery

Undergames

Underghost

Underglitch (1: Mikeydoesart)

Underglitch (2: Dimonds456)

Undergraffiti

Underground Dysfuntions

Underground Saga

Underguild

Underhades

Underhaunted

Underhaven

Underhaze (Everybodyís on Drugs)

Underheart

Underheight

Underheist

Underhell

Underhell (1: Z0Mb3Xor)

Underhero

Underhill

Underhollow

Underhope

Underhuntre

Underhybrid

Underill

Underinferno

Underink

Underinsanity

Underinsert

Underisle

Underjuku

Underkart

Underkeep

Underkin

Underkineses

Underlaberinth

Underlan (Nanalan)

Underland

Underlevel

Underlight

Underline

Underline (Goatline)

Underlink

Underlock

Underloid

Underloop

Underloss

Underlovania

Underlust

Underlust (Heavy Nsfw Content)

Undermachine

Undermachinge

Undermafia

Undermash

Undermelt

Undermemory

Undermess

Undermixture

Undermon (1: Unknown)

Undermon (2: Thegreatrogue)

Undermoon

Undermountain

Undermystic

Undermyth

Undernaf

Undernatural

Undernc

Undernight

Undernovela

Underonline

Underpants

Underpapertale

Underpatch

Underpire

Underplayer

Underplead

Underportal

Underpray

Underptale

Underpuff

Underpunk!

Underrail

Underrama

Underrealms

Underrose

Undersail

Undersane

Undersanity

Underscale

Underscape

Underscar

Underscare

Underscope

Underscramble

Undersea

Underseasons

Undershift

Undershift (1: Magainita)

Undershift (2: Sans-Skelebro)

Undershift (Chara And Frisk Switch Places)

Undershock

Undershot

Undershuffle

Undersick

Undersilence

Undersins

Undersiren

Undersky

Underslayer

Underslept

Undersly

Undersouled

Undersouls

Undersource

Underspell

Underspiral

Understale

Understanding

Understat!C

Understay

Understeam

Understone

Understream

Understrife

Understrum

Understuck

Understuck (1: Flintistrash)

Understuck (2: Pumpkinlol)

Undersurface

Undersurvival

Underswap

Underswap: Sixbones

Undersweets

Underswitched

Underswitched (1: Shadowrosa6)

Underswitched (2: C4Mil0)

Undersymph

Undertail (Sexual Version)

Undertail (Tail Version)

Undertail (Very Heavy Nsfw Content!)

Undertaint

Undertale :: Enlightenment

Undertale Fortress 2

Undertale Genocide Hard Mode

Undertale Last Breath

Undertale Mystery Dungeon

Undertale Oms

Undertale Prime

Undertale Purgatory

Undertale Yellow

Undertale: Chaos Edition

Undertale: Exchanged

Undertale: Four Souls

Undertale: Insanity

Undertale: Last Breath

Undertale: Multiplay

Undertale: Save

Undertale: The Faithful

Undertale: True Genocide

Undertale:Volting Remains

Undertalia

Undertall

Underteller

Undertellers

Undertemper

Underterror

Underthread

Undertide

Undertime

Undertoad

Undertoggle

Undertold (Made By Me!)

Undertomb

Undertone

Undertop

Undertournament

Undertown

Undertoy

Undertrade

Undertrainer

Undertravel

Undertronic

Undertruth

Underttorney

Undertum

Undertune

Undertwist

Undervain

Underveil

Underverse

Undervideo

Undervirus

Underwake

Underwar

Underwar (1: Hamatopurity)

Underwar (2: Bluewolfartista)

Underwarriors

Underwatch

Underwater

Underwear

Underwest

Underwhale

Underwing

Underwings

Underwish

Underwolves

Underworld

Underworld (1: Coulsart)

Underworld (2: Two--Faced--Angel)

Underworld: Sixbones

Underwrestle

Undescord

Undrrdell

Undyingtale

Undynetale

Unending Fatalities

Unex

Unexpectedtale

Unexpecterchanged

Unexpectertwist

Unifell

Unifytale

Unintentional Discoveries

Uniontale

Universaltale

Universe Change

Universes Collide

Unknowntale

Unknowntale (1: Neko_Fell-Chan)

Unlikely Alliances

Unoriginaltale

Unstable Souls

Untoldtale

Uppertale

Urbantale

Us

Ut Gangster

Uta-Mon

Utmob

V!Sans

VHS

Valuefell

Valuetale

Velociswap

Venom!Sans

Venomtale

Versetale

Versiontale

Versotale

Vikingtale

Villagertale

Villaintale

Vintagetale

Virtualtale

Virustale

Vixentale

Vocaloid!Sans

Vocatale

Voidreversal

Voidtale

Voodootale

Vtale

Waffletale

Wanderertale

Warrior's Tale

Warriorcatstale

Warriortale

Wartale

Wartime!Grillby

Washed And Swapped Fate

Watchtale

Weabootale

Webtale

Westerntale

Westertale

What Are Friends For

Whimsical!dreamswap

Whirlswitch

Who Tale

WikiTale

Wildtale

Willswap

Willtale

Willyswap

Willytale

Windowstale

Wiptale

Wishes!Sans

Wishtale

Witchtale

Wolftale

Wondertale

Wondertale (1: Unknown)

Wondertale (2: Mintlovingkitten)

Worktale

Worldtale

Worshiptale

Worthtale

Woventale

Wowtale

Wundertale

Wuttale

X-Out Tale

X-Tale

X-Tale (Cross!Sans & Cross!Chara)

Xanotale

Xenotale

Xerotale

Yandereswap

Yanderetale (1: Yandere Dev)

Yanderetale (2: Tanyt262)

Yellowtale

Yoshitale

Youkaltale

Youngtale

Your Best Friend

Youtube Sans

Youtubetale

Yu-Gi-Tale

Zelos

Zephyrtale

Zodiactale

Zombietale

Zonetale

July 2021 Update (yes I'm crazy), added: Willytale, Willyswap, TaleTurn

Octorber 2021 Update (yes I'm alive), added: Undercraft

December 2021 Update: Chronictale

August 2022 Update, added: Alphatale, Deltarune Titans, Inky's Secret Lab, Polterswap, Poltertale, Tatatale, Undertale Last Breath

Second August 2022 update, added: RyanTale

Third August 2022 update, added: Surfaced Bones

October 2022 update, added: Craftfell, Craftlust, Craftshift, Craftswap, Dreamcraft, Dustcraft, Dusttale: Last Genocide, Errorcraft, Undersouls

November 2022 update, added: Everyrune, Ragnartale, Virustale, Underforce, Dave Minecraft: Trapped

April 2023 update, added: NegativeTale, Homocide, Anti-Error, VHS, WikiTale, DustDust, Undertale: Last Breath, Beyondtale, Fable of Nostalgic Spirits, FR! Underswap, Undersource, The Thought, HeavenTale, Minecraft + Ink, Underink, Piratetale, SMPtale, Nightmareterrortale, Aircrafttale, Undershift, AnxietyTale, Hellspawntraveler, UDR!Underswap, Breaking Barrier, RyanSwap, RyanFell

May 2023 update, added: Operation Tundra Eel, Something New, SwapOut, Underplayer, DreamSwap,whimsical!dreamswap, Shattered!Dream, ShatteredDreamsAU (Galacii), Dark Cream, One Small Dream, StoneSleep!AU, Moltendreams!AU, UnderLove, Puretale, Purereverse, Splitsides, Teatale, Undertale:Volting Remains, Pureswap, Valuetale, Valuefell, Vtale. REMOVED ALL DUPLICATES

May 2023 update 2, added 423 AU's I found here

October 2023 update, added: AI-Tale (Lugmillord), Amongtale, Ask Drunk Chara, AskFriskAndCompany, BRILAGES DUSTTALE, Bloxtale, ChanceTale, Clickertale, Crytale (Molly Font), Distrust, DustSwap: Scarlet Flare, DustSwap: The Butterfly Effect, Dustswap: Frustation and Collapse, Dusttrust, FNAF: THA, FellFell, FelledFell, Fellspin, Freaktale, Gentale, Godverse, Halfswap, Human!Safety, HumanTale, INSANITY RENEWED, Insanity!Tale, Kindred Spirits, Mettaton's Legs AU, Midswap, MinionTale, N!Bloxtale, Nights Unwinded, One By One, Otherworld, Papyrus's Belief, PotatoTale, RevertFell, SG!Dustbelief, Sans the Game, Swapped Lies, Techcybertale, The Frenchiest Fry, The Tale of a Twisted Curse, The True Godverse, Twin Runes, UNDERTALE: BREAK YOUR SOUL, UnderHat, Undertale Prime, Undertale Purgatory, Undertale: Insanity, Yandereswap, Youtubetale. Also changed FR!underswap to CRINGE!underswap

Thank you all SO MUCH for your help in finding more Undertale AU's!