Undertale OST

001

1:29

Introduction sequence

002

0:32

When viewing a new SAVE file

003

0:23

Protagonist’s first encounter with Flowey

004

0:57

During Toriel's introduction/After Toriel's test of independence/When Toriel leads the protagonist to her home

005

1:32

While traveling through the Ruins

006

0:56

On the Joystick Config menu during Autumn and Spring

007

0:22

During the encounters with Dummy and the first Froggit/When fighting the Glad Dummy during the Genocide Route

008

0:17

During Toriel's test of independence

009

0:56

While fighting regular monsters

010

0:56

Napstablook's boss fight

011

0:50

GAME OVER screen

012

2:03

In Toriel's home

013

2:02

In the protagonist's room in Toriel's Home when the lamp in their room is turned off

014

1:48

Toriel's boss fight

015

0:50

During Sans's introduction/In the room with Sans's sentry station in Waterfall/In the room with Sans's Hot Dog stand in Hotland/In Grillby's/In Papyrus and Sans's House/In Napstablook's snail farm

016

0:32

During Papyrus's introduction/When Papyrus introduces his puzzles/During the boss fight with Papyrus before he turns the protagonist's SOUL blue/After sparing Papyrus/At the end of the hangout with Papyrus if the protagonist did not flirt with him during his battle

017

1:44

While traveling through Snowdin Forest

018

0:30

On the Joystick Config menu during Winter

019

0:06

Before fighting the Dogi

020

0:44

In the secret cave in Snowdin Forest

021

0:37

When the Annoying Dog steals the legendary artifact in the Artifact Room/Phone call for the Dog Ending and the Dirty Hacker Ending/After defeating Toriel in Hard Mode

022

1:16

In Snowdin

023

0:50

In the Snowdin Shop/In Gerson's Shop

024

0:57

During the boss fight with Papyrus after he turns the protagonist's SOUL blue

025

1:56

When the befriending sequences with Papyrus, Undyne, and Alphys begin/Bratty and Catty's shop

026

0:26

When the befriending sequences with Papyrus and Alphys get tense

027

0:35

During an intense moment during the befriending event with Papyrus

028

1:01

While discussing talking flowers with Sans in Grillby's/In room_water_redacted

029

0:18

When seeing Undyne for the first time

030

0:45

While hiding from Undyne during her first encounter

031

2:06

While traveling through Waterfall

032

0:26

While being pursued by Undyne

033

0:32

In more populated parts of Waterfall/In Muffet's Spider Bake Sale in Hotland

034

1:15

After placing the umbrella in the statue for the Piano Puzzle/After sparing Asgore/After the battle with Asriel/The ending screen after the True Pacifist Ending Credits

035

0:25

While the small bird carries the protagonist over a disproportionately small gap

036

2:25

Mad Dummy's boss fight

037

0:38

In Napstablook's house

038

0:23

CD found in Napstablook's house

039

0:25

CD found in Napstablook's house

040

0:12

CD found in Napstablook's house

041

0:56

While lying on the ground and feeling like garbage in Napstablook's house

042

0:42

During the snail race in Napstablook's snail farm

043

0:57

In Temmie Village

044

0:45

In the Tem Shop

045

1:22

Before fighting Undyne (if Papyrus was spared)/While cooking with Undyne

046

1:55

Undyne's boss fight

047

0:14

In the areas of Hotland preceding the Lab and the area after the Lab

048

1:25

During Alphys's introduction/While traversing the Lab after Mettaton's quiz show (not during the Genocide Route)/At the beginning of the date with Alphys

049

0:46

After Mettaton bursts through the wall of the Lab/Before the jetpack sequence of Mettaton's cooking show/After the Bomb Defusal sequence of Mettaton's news report

050

1:03

During battles with Mettaton

051

2:22

While traveling through Hotland

052

0:34

On the Joystick Config menu during Summer

053

1:03

While fighting monsters in Hard Mode

054

1:27

Mettaton's cooking show/MTT Resort

055

1:01

Jetpack sequence of Mettaton's cooking show

056

0:42

When Alphys confesses her lies and feelings towards Undyne during the date with Alphys

057

0:17

During Mettaton's news segment

058

0:47

During the bomb defusing sequence

059

1:46

Muffet's boss fight

060

0:58

So Sorry's boss fight

061

1:24

During Mettaton's musical performance

062

0:32

During the Multicolor Tile Puzzle in Hotland

063

2:50

While talking to Sans in the MTT Resort's restaurant

064

0:12

In the room between the Hotel and the CORE

065

2:46

While traveling through and fighting enemies in the CORE

066

0:07

After Mettaton betrays Alphys and declares his desire to kill the human

067

0:14

After Mettaton's switch has been flipped, and before his silhouette disappears

068

2:14

Mettaton EX's boss fight

069

1:47

While Mettaton takes phone calls after his fight

070

0:20

During the first elevator ride to New Home

071

6:21

When the protagonist travels through New Home and hears the story of Asriel and the First Human

072

1:02

Never

073

2:12

While Sans judges the protagonist/At the end of the fight with Asgore

074

0:14

When first meeting Asgore

075

0:31

When viewing the barrier before the fight with Asgore

076

0:21

Precedes the fight against Asgore

077

2:36

Asgore's boss fight

078

0:34

Before Photoshop Flowey's fight/Before Asriel Dreemurr's fight/Before the special thanks segment of the True Pacifist Ending Credits

079

4:00

Photoshop Flowey's boss fight

080

1:52

During the fight against Photoshop Flowey after all human SOUL segments

081

3:28

During the phone calls of most Neutral Route endings/During the end of the battle with Undyne if the protagonist kills her

082

0:18

Outside of Undyne's House right before her hangout with the protagonist

083

2:06

While exploring the True Lab

084

1:20

When battling the Amalgamates

085

2:30

When Toriel intervenes in the fight against Asgore in the True Pacifist Route

086

2:02

When monsters encourage the protagonist while Flowey ensnares them with vines

087

3:01

The first segment of Asriel Dreemurr's boss fight

088

0:21

The second segment of Asriel Dreemurr's boss fight after "Hyper Goner" is used

089

1:53

The second phase of Asriel Dreemurr's boss fight after the SAVE button appears

090

2:05

The end of Asriel Dreemurr's boss fight when memories of Chara and Asriel appear

091

0:18

When Asriel uses the absorbed SOULs to destroy the barrier

092

4:44

During the epilogue

093

0:32

On the menu screen after Asriel Dreemurr's boss fight before the True Reset option appears

094

1:54

During the scene on the surface at the end of the True Pacifist Route

095

4:12

During the credits when all of the monsters are being shown

096

2:15

During the credits when all of the Kickstarter backers are being shown

097

0:34

During Undyne's speech before becoming Undyne the Undying

098

2:36

Undyne the Undying's boss fight

099

0:30

Mettaton NEO's "boss fight"

100

2:36

Sans's boss fight

101

0:31

End of a Neutral Route in the demo, never used in the final game