Welcome to Temmie Chang (and Toby Fox) & Co.'s vision of...

The UNDERTALE Alternate Universe that has ACTION, COMEDY, AND.. ROMANCE?! Will you EXECUTE them all? Will you PACIFY those who HATE DISLIKE YOU? Time for you to figure out...
Note: This is a writer's take on the AU of Underswap. It is inspired on many versions of the AU. It'll try to be a unique take on the AU with new characters, unique swaps, and reused characters from UNDERTALE.
Credits & Inspirations
Credits
@AntTenna
: The writer & Concept Artist
@hooded-the-original
: Concept Artist
@Scamshi
: Concept Artist
@souptaels
: Logo Artist
@T-Samuel
: Supportive Friend
Toby Fox: Creator of UNDERTALE
Temmie Chang: Second creator of UNDERTALE, "creator" of UNDERSWAP
Community: Classic Underswap owners
Inspirations
After the War (Work in Progress)
Long time ago, two races roamed the Earth:
HUMANS AND MONSTERS
One day, war broke out between the two races...
But... We've heard that tale many times, haven't we?
[FLASH]
Once upon a time, a human fell below MOUNT EBOTT
They were found by the young prince of monsters, taken to the royal family...
The Dreemurrs, without a second thought, accepted the human as their own...
One day, tragedy struck...
[The line of text stop, showing Chara's soul being absorbed, Asriel's brutal murder, and the rage between the monarchs. You see the bodies of both Chara and Asriel next to each other.]
Due to this tragedy, Asgore vowed the death of all humans...
After three humans dying by his hands, he fled his duties, leaving the throne empty...
Toriel would take the throne, finding other ways besides death to free the people...
Hope would be lost...
Will you be the next child she'll have to bury?
Characters, Areas, and Souls
Characters
#1 Ruins/New Home <> Waterfall
Frisk <> Kris
Flowey <> Ragel
Toriel <> Asgore
Napstablook <> Dummy
Talking Rocks <> Echo Flowers
Froggit <> Shyren
Whimsun <> Woshua
Moldbygg <> Moldsmal
Vegetoid <> Clam Girl
Migosp <> Love Crab (UT/DR Cut Character)
Aaron <> Loox
#2 Snowdin Forest <> Hotland
Sans <> Papyrus
ICE-E <> Catti
Muffet <> Nice Cream Guy
Greater Dog <> Bob
Snowy <> Vulkin
Ice Cap <> Tsunderplane
Chilldrake <> Pyrope
Glyde <> So Sorry
Dogamy & Dogaressa <> Royal Guard 01 & Royal Guard 02
Jerry <> Berdly
Gyftrot <> Cheerleader (UT/DR Cut Character)
Glyde <> Bomb (UT/DR Cut Character)
#3 Snowdin Town <> MTT Resort
Monster Kid <> Susie/Suzy
Snowdrake's Father <> Hot Dog Vulkin
Shopkeeper <> Hand Receptionist
Innkeeper <> Diamond Receptionist
Sleeping Monsters <> Hot Dog Harpy
Rabbit Kid <> Diamond Boy 1
Rabbit Girl & Cinnamon <> Diamond Boy 2
Gift Bear <> Business Dude 1
Politics Bear <> Business Dude 2
Scarf Mouse <> Business Manticore
Nacarat Jester <> Shambling Mass
Slime Family <> Dragon Family
The Person Behind the Door <> The Hotel Resident
Ice Wolf <> Charles
Library Lizard <> Fish Receptionist
Library Loox <> MTT Resort Janitor
Newspaper Editor 1 <> Fuku Fire
Newspaper Editor 2 <> Skateboard Girl
Grillby <> Burgerpants
Big Mouth <> Oni
Drunk Bun <> Fox Head
Ugly Fish <> Fickus Lickur
Red Bird <> Scared Donut Guy
Punk Hamster <> Dress Lion
#4 Waterfall <> Ruins/New Home
Undyne <> Alphys
Goner Kid <> Susie (Darkworld Form)
Mad Dummy <> Mettaton Box
Elder Puzzler <> Gaster Follower 2
Echo Flowers <> Talking Rocks
Echo Flower Explainer <> Gaster Follower 3
#5 Hotland <> Snowdin Forest
Bratty & Catty <> The Warrior & Purple Guy
Present Enemies
Doge
[Read #2]
#6 Snowdin Town <> MTT Resort
[Read #3]
#7 Core <> True Laboratory
Madjick <> Reaper Bird
Knight Knight <> Endogeny
Final Froggit <> Memoryhead
Whimsalot <> Lemon Bread
Astigmatism <> Snowdrake's Mother
#8 Judgement Hall <> Ruins Exit
Sans <> Papyrus
#9 New Home/Ruins <> Waterfall
Photoshop Flowey <> Waterfall Statue
Asriel <> Chara
Areas
Old Home (Ruins)
Home's Castle (Toriel's Home)
Old Hall (Ruins Exit)
Dustbowl (Snowdin Forest)
Metropolis (Snowdin Town)
Wonderland (Waterfall)
Undyne's Sanctuary (Alphys' Lab)
Forgotten Sanctuary (True Lab)
Glaciers (Hotland)
Glacier City (MTT Resort)
Nucleus (Core)
Ebott City Entrance (Judgement Hall)
Ebott City (New Home)
Ebott Capitol Building (Asgore's Castle)
Soul Swaps
Determination (Red) <> Hope (White/Pink)
Integrity (Blue) <> Justice (Yellow)
Patience (Cyan) <> Perseverance (Purple)
Kindness (Green) <> Bravery (Orange)
Character Backgrounds
(Soon to include EVERY CHARACTER in next version)
Major Characters
Asgore: Asgore, consumed by regret following the horrific deaths of three children, has sought refuge in Old Home. He spends his days in Old Home's Castle, haunted by memories while drinking tea and attempting to bake. In his solitude, he attempts to repair the wounds left in the underground, yet he is frequently portrayed as a coward who has abandoned his responsibilities.
Sir Mehblook: Sir Mehblook, formerly a spirit hunting for a false body, has now donned the armor of a knight. He commands the "Wonder Crew" in protecting Old Home from any dangers. His unconventional attitude and fun demeanor frequently brighten the mood in stressful situations.
Ragel: The flamboyant dancing mushroom, Ragel, initially appears to be an ally, helping Kris throughout their journey. However, their true intentions surface when the moment arrives to confront Toriel, revealing a darker plan aimed at the destruction of humanity and anyone who supports it.
Papyrus: Papyrus, whilst remaining the loving and eccentric skeleton known for his love of riddles and snacks like dinosaur egg porridge, he displays signs of lethargy. He enjoys working at "The Burger Joint" in Metropolis, owned by Burgerpants, where he occasionally ignores his responsibilities, preferring to eat and daydream rather than work too hard.
Sans: Sans, Metropolis' ever-chill sheriff, is more active and energetic than before, although maintaining his typical laid-back manner. He joyfully accepts his responsibilities, forming friendships in the lively town and demonstrating a commitment to maintaining peace among its unusual population.
Alphys: Alphys, now a more confident figure, proudly wears her sheriff's badge as she grows into her role as the underground community's guardian. Despite her newfound confidence, she still suffers from feelings of inadequacy, frequently worrying that she isn't doing enough for people she defends.
Undyne: Undyne, a creative scholar with a dash of lunacy, runs her own sanctuary called Undyne's Sanctuary, where she conducts experiments and invents new things. Her thirst for knowledge is combined with an unwavering desire to defend her home, making her a formidable force in the underground.
M.E.W.: This fearsome creation, formed from Angsterblook's fury, was inspired by the iconic anime character Mew Mew Kissy Cutie. M.E.W., now residing in the Glaciers, was created exclusively to destroy any humans who try to enter the Underground, creating dread in those who would oppose its wrath and fixation with perfection.
Toriel: Toriel, the underground's monarch, worked valiantly to free her people without resorting to violence. After the fifth fallen human infant, her attempts appear hopeless, leaving her sad as she confronts the brutal reality of her failings in the hallways of the Ebott Capitol Building.
Chara: Chara, the first human to fall into the Underground, was discovered and adopted by the royal family, where they met their new sibling, the compassionate prince Asriel. After witnessing their best friend's terrible murder, Asriel absorbed their soul in a desperate act of love and desperation. While their acts resulted in a common end. When Asriel died, their soul was moved into a new vessel, waiting for someone to bring it to life.
Asriel: Asriel, the compassionate and kind prince of the Underground, was the first to greet Chara, the fallen human, as if they were siblings and true friends. He hoped for a society in which humans and monsters could coexist together. However, his life was brutally cut short by a violent murder that broke his family and fueled the fury of the Underground's king.
Minor Character
Napstablook: Napstablook, Asgore's assistant in Old Home, is a helpful ghost who enjoys teaching players about fight mechanics. His compassionate mentoring allows novice adventurers to learn and adapt as they confront the hardships of the subterranean. When he isn't assisting Asgore, he performs his music for all to hear.
Mettablook: Mettablook, a spiteful and solitary spirit, has settled within the dusty crevices of Glaciers. They spend their days creating complicated, junk-filled traps, plagued by an ingrained inferiority complex. Fueled by a burning jealousy of their cousins successes, they devise a plan to establish their own value at all costs.
Burgerpants: Burgerpants, the owner of "The Burger Joint" in Metropolis, manages a lively burger restaurant where Papyrus works and eats wonderful food. The restaurant is a favorite hangout for residents looking for a tasty meal and some humorous conversation.
Royal Guard 01 & Royal Guard 02: These two are an inseparable pair of dedicated yet inept guards assigned to a position in the busy Glaciers area. They are nearly obsessively faithful to their commander, Alphys, and follow her every command to the letter. Despite their militaristic approach, they are frequently distracted by their own affection for one another, resulting in a chaotic, charming mess for all to behold.
Grillby: Grillby, the owner of a quiet, pleasant tavern in Glacier City, is a cool-headed bartender who rarely speaks. With a calm knowledge, he knows exactly what his patrons require, providing a feeling of steadiness amidst the resort's colorful pandemonium. He is a stoic person who offers a surprise source of comfort and information to weary travelers.
Dogamy & Dogaressa: Dogamy and Dogaressa, two overzealous guards patrolling the Glaciers, are on a mission to please Alphys, their captain. They are completely committed to each other and their mission, but their love for one another frequently gets in the way, resulting in a comic duet of puppy love for the player to manage.
Nice Cream Guy: The Nice Cream Guy, the owner of a modest, struggling business in Old Home, is a kindhearted soul in need of customers. He is constantly attempting to sell his delectable sweets, but his friendliness and lack of assertiveness make it impossible. More of a sorrowful figure than a villain, his interactions with the player center on the basic optimism of second chances and the power of kindness.
Muffet: Muffet, the owner of a once huge bakery, is frequently driven to desperation by her goals for her sweets. To prepare a "special pastry," she resorts to darker methods, devising schemes to eliminate any humans that cross her threshold in order to obtain the ingredient she requires.
Aster: Serif Aster, Metropolis' previous sheriff and a smart scholar, was instrumental in assisting Alphys and Undyne in spreading energy across the Underground. He abruptly vanished one day, abandoning his life as a scholar and hero. He now owns his own warehouse filled of trinkets and junk food, a mute reminder of a mind that once sculpted the kingdom's very landscape.
Old Man: The Old Man, a renowned warrior who sold his hammer for a pen, evolved into a wise writer who established the Underground's first sanctuary. He was a revered elder known for his knowledge and stories from the past. However, he inexplicably departed without a trace, leaving a trail of legends and a world wondering what happened to its greatest hero.
Official Character Sprites

(Will get constant updates)
Gerson sprite by Toby Fox
Papyrus sprite by Hoodedsckater - Edited by AntTenna
Toriel Weapon Concept

Based on the Classic Underswap art by PopcornPr1nce
Soundtrack
Old Home
1. After the War (Once Upon a Time)
2. Progress Report (Start Menu)
3. The Mountain's Hums
(Original: Plays as you walk out the dump that was the bottom of the hole you fell in.)
4. Slight Shock (Fallen Down)
5. Walking though the Dump (Ruins theme)
6. Golly, What a Rainy Day! (Uwa!! So Temperate)
7. Teary Forecast (Anticipation)
8. Asgore's Advice (Unnecessary Tension)
9. Dancing with Mushroom (Your Best Friend)
10. New Team...?
(Original: Plays when Ragel joins your "team")
11. Ruff 'n Tuff (Enemy Approaching)
12. Anticipated Brawl (Ghost Fight)
13. Hope (Determination replacement)
14. Tea Party Invite
(Original: Plays when Sir Mehblook gives the tea party invitation.)
15. Old Home City
(Original: Plays when you enter the Old Home village)
16. Tea Time
(Original: Plays when the tea party begins.)
17. Tea Party GONE MAD!??!
(Original: Plays when the Tea Party becomes a Food Fight.)
18. Cozy Old Castle (Home)
19. Cozy Old Castle (Resting) (Home (Music Box))
20. Blazing Heart (Asgore Heartache)
21. Progress Report (Variant 1)
(Original: Plays after Old Home segment.)
Dustbowl/Metropolis
22. Call me Paps! (Papyrus' sans.)
23. comedic drums. (Sans' Nyeh Heh Heh!)
24. It's Hot in The Dustbowl (Snowy replacement)
25. Golly, What a Sunny Day! (Uwa!! So Holiday)
26. Blade Bros (Dogbass)
27. Wonders (Mysterious Place)
28. Bob Time (Dogsong)
29. Welcome to Metropolis (Snowdin Town)
30. Buy Anything (Shop)
31. Rattling Bones (Sans' Bonetrousle)
32. hanging out. (Sans' Dating Start!)
33. hanging questions. (Sans' Dating Tense!)
34. hanging spar. (Sans' Dating Fight!)
35. Tension (Sans' Premonition)
36. Progress Report (Variant 2)
(Original: Plays after Dustbowl Segment.)
Wonderland
37. You are in Wonderland (Danger Mystery)
38. Sheriff in Town (Alphys' Undyne)
39. Shining Light (Waterfall replacement)
40. The Chase! (Run!)
41. Aster's Warehouse
(Original: Plays when you enter Aster's shop)
42. Golly, What a Brisk Day!
(Original: Variant of "Golly, what a ___ Day!")
43. Semi Fishing Trip
(Original: Plays when you and Grandpa Semi goes fishing.)
44. Beautiful Leaves (Quiet Waters)
45. Fallen Angel (Memory replacement for Asriel <> Chara swap.)
46. The Pink Faced Onion that is Used as a Bridge over the Lake (Bird That Carries You Over a Disproportionately Small Gap replacement)
47. Stage Fright? No... STAGE FIGHT! (Mettablook's Dummy!)
48. Haunted House (Pathetic House)
49. Napstatrack (Napstablook's Spooktune)
50. Mettatrack (Mettablook's Spookwave)
51. Mehtrack (Mehblook's Ghouliday)
52. Angstertrack
(Original: Angsterblook's track before becoming M.E.W.)
53. Peaceful Chatting (Chill)
54. Monkeys Swinging (Thundersnail)
55. Doge Town (Temmie Village)
56. The G's Shop (Tem Shop replacement for Toby Fox <> Temmie Chang swap)
57. The Big WOOF
(Original: Plays when you make a big purchase from Toby Fox.)
58. Got you NOW! (Ngahhh!!)
59. Dueling for Hopes & Dreams (Alphys' Spear of Justice)
60. Progress Report (Variant 2)
(Original: Plays after the Wonderland.)
Undyne's Sanctuary/Glaciers/Glacier City
61. Here we Are (Ooo)
62. Undyne (Undyne's Alphys)
63. Do you hear the bells? (M.E.W.'s It's Showtime!)
64. Maze Game (M.E.W.'s Metal Crusher)
65. Cheater, Cheat, Soul Eater!
(Original: Plays when you cheat the maze in front of M.E.W.)
66. Frost Belt (Another Medium replacment)
67. Golly, What a Chilly Day! (Uwa!! So Heats!!)
68. Megalo Strikes (Stronger Monsters <> Megalovania swap)
69. Chilling at Glacier City (Hotel)
70. We aren't sure if this place is big enough to be considered a city... (Can You Really Call This a Hotel, I Didn't Receive a Mint on My Pillow or Anything replacement)
71. Ladies & Gentlemen!
(Original: Plays when you meet "Announcer" (UT/DR OC).)
72. Fight Against the Teevee Goons
(Original: Plays when you fight Announcer's goons (UT/DR OCs).)
Chase Sequence
(Original: Plays when Announcer chases you)
73. Hustle n' Tussle
(Original: Plays when you fight Announcer.)
74. Meant to Be (M.E.W.'sConfession)
75. Anime Introduction (M.E.W.'s Live Report)
76. Anime Outroduction (M.E.W.'s Death Report)
77. "Nice" Cream Resort (Nice Cream Guy's "Spider Dance")
78. NICE CREAM RECEIVED!
(Original: Plays when you pay a lot of money for the last Nice Cream)
79. Glyding in! (Wrong Enemy!?)
80. Anime Romance Scene? (M.E.W.'s Oh! One True Love)
81. Anime Death Scene! (M.E.W.'s Oh! Dungeon)
82. Grillby's
(Original: Plays when you enter Grillby's.)
83. Smoke Break (With Papyrus) (Papyrus' It's Raining Somewhere Else)
84. Here comes the Snowstorm (Core Approach replacement)
85. Nucleus Snowstorm (Core replacement)
86. WINTER SPECIAL! (M.E.W.'s Last Episode!)
87. You didn't... (M.E.W.'s Oh My...)
88. Mad Anime Warrior (M.E.W.'s Death by Glamour)
89. Doll in Pieces (M.E.W.'s For the Fans)
90. Progress Report (Variant 3)
(Original: Plays after the Winter Wonderland.)
Ebott City
91. The Bridge (Long Elevator)
92. Our History (Undertale (OST 71) replacement)
93. A Few Words (Papyrus' The Choice)
94. Have a Cool Song that Will Only Play Once for Papyrus (Papyrus' Song That Might Play When You Fight Sans)
95. Falling (Toriel's Small Shock)
96. The Exit (Barrier)
97. Cœur Brisé (Toriel's Bergentrückung)
98. Queen (Toriel's Asgore)
99. Forgiveness
(Original: Plays when Toriel asks for forgiveness before her death.)
100. Thanks for the Help, Partner (You Idiot)
101. Dancing with Death (Ragel's Your Best Nightmare)
102. Faint Hope (Finale)
103. The End...? (An Ending)
104. Progress Report (Variant 4)
(Original: Plays after getting a neutral ending.)
Destined Route
105. She's Trying to Play the Saxophone (Alphys's She's Playing Piano)
106. Dangerous Mystery (Here We Are)
107. Isolated (Amalgam) [Forgotten Sanctuary ost]
108. Slight Shock (Reprise) (Fallen Down (Reprise))
109. Endless Motivation (Don't Give Up)
110. Wishes for Monsterkind (Chara's Hopes and Dreams)
111. Destruction of Humankind! (Chara's Burn in Despair!)
112. Battle Against the Fallen Angel (Chara's Save the World)
113. Chara's Lament (Chara's His Theme)
114. Fulfilling Destiny (Chara's Final Power)
115. An Angel Gains Their Wings
(Original: Plays when Chara's soul ascends away.)
116. Our New Home (Reunited)
117. This calls for a Celebration, Folks! (Bring It In, Guys!)
118. Farewell (Last Goodbye)
119. Progress Report (Variant Complete...?)
(Original: Plays after the Blessed Route.)
Executioner Route
120. Different Path
(Original: Executioner Route theme)
121. Bereavement
(Original: Asgore's Executioner Route theme.)
122. Not a Comedian Anymore
(Original: Sans Executioner Route theme.)
123. Screaming for Help
(Original: Plays when Susie sees through you in the Executioner Route.)
124. Shining Hope for an Alpha's Reslove (Alphys' But the Earth Refused to Die)
125. Final Duel to Save Monsterkind (Alphys' Battle Against a True Hero)
126. Pissed me Off (Power of Neo)
127. Strongest Monster (Megalovania <> Stronger Monster swap)
128. HEARTBURN
(Original: Toriel Executioner Route theme)
129. Angered Spirit
(Original: Plays when you meet Asriel)
130. Farewell (Good Night)
131. Progress Report (Variant Complete) (Menu (Full))
Extras
132. comedic drums (trailer version) (Sans' Bontrousle (trailer version))
133. sensational song (Sans' PAPYRUS' COOL SONG)
134. stry_pro_new (Gerson's abc_123_a)
135. Lord of the Hammer (Gerson's Gaster theme)
136. Cooking Spaghetti (Papyrus' Ice Cream)
137. Your Best Friend (Asriel's I Miss You)
Hashtags
#undertale | #underswap | #concept | #other
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