WELCOME TO...

...A story where you're forced to kill everyone for your freedom.

About

Underswap (stylized as underswap and formerly Under Swap) is a writer’s take on Underswap that reinterpret character swaps using characters characters from both Undertale and Deltarune. It has a parallel story that is spiritually connected to Underswap named Warpedsun. The story overall doesn't change, but it tries to be creative just by not only swapping characters, but also replacing locations.

MAIN STORY

Long ago, two races lived on the Earth: Humans and Monsters. They lived in unspoken harmony with each other until, one day, war broke out between the two races. The humans were victorious in the first battle, causing the King and Queen to leave the throne.

After this, a family risen up to replace the throne, granting themselves the titles "Guardians of Monsterkind." With them, the war ended before more monsters could perish, but they would be banished and sealed underground with a combined WILLPOWER.

Many years after the war, in 202X, a human child climbs Mount Emmitte to gain a better view of their city, but would fall down the hole. It is said that those who climb the mountain never return. After that, the story begins.

NOTABLE CHANGES

MAIN CAST SWAPS

• Frisk ⇆ Kris

• Flowey ⇆ Ragel

• Toriel Dreemurr ⇆ Rudy Holiday

• Napstablook ⇆ Sir. Gloopi (Ruins Dummy)

• Sans ⇆ Papyrus

• Undyne ⇆ Alphys

• Mettaton (New Name: Mettacrit) ⇆ Mad Mew Mew

• Asgore Dreemurr ⇆ Carol Holiday

• Asriel Dreemurr ⇆ Noelle Holiday

• Chara Dreemurr ⇆ Dess Holiday

MINIBOSS CAST SWAPS

• Dog ⇆ Unused Larpy Enemy

• Dogamy & Dogaressa ⇆ Bratty & Catty

• Lesser Dog ⇆ Unused Cheerleader Enemy

• Greater Dog ⇆ Bob

• Glyde ⇆ RG01&02

• So Sorry → RG03&04

• Muffet ⇆ Nice Cream Guy

MINOR CAST SWAPS

• Rocks ⇆ Echo Flowers

• Froggit ⇆ Shyren

• Whimsun ⇆ Woshua

• Moldsmall ⇆ Moldbygg

• Look ⇆ Aaron

• Migosip ⇆ Waterfall Shark

• Vegetoid ⇆ Love Crab

• Berdly ⇆ Monster Kid

• Snowdrake ⇆ Jockington

• Ice Cap ⇆ Vulkin

• Snowman ⇆ Tsunderplane

• Faun ⇆ Clam Guy

• Gyftrot ⇆ Elephant Monster (Art Book)

• QC ⇆ Diamond Receptionist

• Inn Receptionist ⇆ Hand Receptionist

• Sleeping Monsters ⇆ Hot Dog Harpy

• Rabbit Kid ⇆ Diamond Boy

• Rabbit Lady & Cinnamon ⇆ Tall Diamond Boy

• Gift Bear ⇆ Fire Coffee

• Political Bear ⇆ Business Dude

• Grillby ⇆ Burgerpants

• Crazy Bun ⇆ Oni

• Big Mouth ⇆ Disembodied Fox Head

• Punk Hamster ⇆ Dress Lion

• Ugly Fish ⇆ Scared Donut Guy

• Scarf Mouse ⇆ Ficus Licker

• Red Bird ⇆ Business Manticore

• Red Demon ⇆ Shambling Mass

• Slime Family ⇆ Dragon Family

• Knock Lover ⇆ MTT Resort Resident

• Ice Wolf ⇆ Charles

• Library Lizard ⇆ Fish Receptionist

• Library Loox ⇆ Slime Janitor

• Scarf Lady ⇆ Fuku Fire

• Lady Garf ⇆ Skateboard Girl

• Onionsan ⇆ Snowdrake's Mother

• River Person ⇆ Father Alvin

• Gap Bird ⇆ Snowdrake's Father

• Final Froggit ⇆ Unused Present Enemies

• Whimsalot ⇆ Unused Coraler NPC

• Astigmatism ⇆ Memoryhead

• Madjick ⇆ Shyra

• Knight Knight ⇆ Endogeny

• Reaper Bird ⇆ Watching Man

• Heats Flamesman ⇆ Rainy

MISCELLANOUS SWAPS

• Toby Fox ⇆ Temmie Chang

• Loren ⇆ Gaster Follower 1

• Elder Puzzler ⇆ Gaster Follower 2

• Echo Flower Explainer ⇆ Gaster Follower 3

• Goner Kid → Chilldrake

• Clam Girl ⇆ Briefcase Dude

• Dummy ⇆ Lamp

• Save Bell (Silver Waterfall Bell) ⇆ Restart Star (Save Point)

NEW LOCATIONS (TO BE EXPANDED UPON)

RUINS REPLACEMENTS (Human Sanctuary)

• Trash Dump → Ruins Intro

• Spider Bake Sale → Free Nice Cream Samples

• Flooded City → Ruins

• Human-Monster War Memorial (Own location)

• Sanctuary Castle → Toriel's Home

• Sanctuary Village → Home

SNOWDIN REPLACEMENTS (Vulkino)

• Vulkino Desert → Snowdin

• Citytropolis (Own location)

• Burger Joint → Grillby's

• Sans & Papyrus' Home (Own location)

• Tem Zone (Own location)

• Vulkino Mall → Snowdin Town

WATERFALL REPLACEMNTS (Wonderland)

• Waterfall Entrance → Deep Hole

• Garbage Dumb → Scrap Yard

• Undyne's House → Alphys's Lab

• Haunted Mansion → Napstablook & Mettaton's Houses

• Snail Farm → Wise Monkeys Place

• Temmie Village → Toby's Secret Area

• Artifact Room → Temmie Flake Store

• Blook Acres → Spooky Corn Field

HOTLAND REPLACEMENT (Blizzardcean)

• Core → Mana Nexus

• Lab → Tower

• MTT Resort → Winter Village

• True Lab → Old Study Room

• Art Club Room → Another Sentry Station

• Spider Bake Sale → Nice Cream Shop

NEW HOME REPLACEMENT (Monster Sanctuary)

• Monster District Capital (Own location)

• Guardian Palace → Asgore's Castle

• Last Corridor → Ball Room

• Barrier (Own location)