UNDERTALE: Underswap (OST):

Old Home

1. Our History (Once Upon a Time)

2. Progress Report (Start Menu)

3. The Mountain's Entrance

4. Dancing with Mushroom (Your Best Friend)

5. Unexpected (Fallen Down)

6. Walking though the Dump (Ruins)

7. Golly, What a Rainy Day! (Uwa!! So Temperate)

8. Teary Forecast (Anticipation)

9. Asgore's Advice (Unnecessary Tension)

10. Ruff 'n Tuff (Enemy Approaching)

11. Anticipated Brawl (Ghost Fight)

12. Hope (Determination)

13. Tea Party Invite

    (Original: Plays when the invitation is given.)

14. Tea Time

    (Original: Plays when the tea party begins.)

15. Tea Party GONE MAD!??!

    (Original: Plays when the Tea Party becomes a Food Fight.)

16. Cozy Old Castle (Home)

17. Cozy Old Castle (Resting) (Home (Music Box))

18. Blazing Heart (Heartache)

19. Progress Report (Variant 1)

    (Original: Plays after Old Home segment.)

Dustbowl/Metropolis

1. Call Me Paps! (Sans.)

2. comedic drums. (Nyeh Heh Heh!)

3. It's Hot in The Dustbowl (Snowy)

4. Golly, What a Sunny Day! (Uwa!! So Holiday)

5. Blade Bros (Dogbass)

6. Wonders (Mysterious Place)

7. Bob Time (Dogsong)

8. Welcome to Metropolis (Snowdin Town)

9. Buy Anything (Shop)

10. Rattling Bones (Bonetrousle)

11. hanging out. (Dating Start!)

12. hanging questions. (Dating Tense!)

13. hanging spar. (Dating Fight!)

14. Tension (Premonition)

15. Progress Report (Variant 2)

    (Original: Plays after Dustbowl Segment.)

Wonderland

1. You are in Wonderland (Danger Mystery)

2. Sheriff in Town (Undyne)

3. Shining Light (Waterfall)

4. The Chase! (Run!)

5. Aster's Warehouse

   (Original: Plays when you enter Aster's shop)

6. Golly, What a Brisk Day!

   (Original: Variant of "Golly, what a ___ Day!")

7. Semi's Fishing Trip

   (Original: Plays when you and Semi goes fishing.)

8. Beautiful Leaves (Quiet Waters)

9. Fallen Angel (Memory)

10. The Pink Faced Onion that is Used as a Bridge over the Lake (Bird That Carries You Over a Disproportionately Small Gap)

11. Stage Fright? No... STAGE FIGHT! (Dummy!)

12. Haunted House (Pathetic House)

13. Napstatrack (Spooktune)

14. Mettatrack (Spookwave)

15. Mehtrack (Ghouliday)

16. Angstertrack

    (Original: Angsterblook's track.)

17. Peaceful Chatting (Chill)

18. Monkeys Swinging (Thundersnail)

19. Doge Town (Temmie Village)

20. The G's Shop (Tem Shop)

21. The Big WOOF

    (Original: Plays when you make a big purchase.)

22. Got you NOW! (Ngahhh!!)

23. Dueling for Hopes & Dreams (Spear of Justice)

24. Progress Report (Variant 2)

    (Original: Plays after the Woodland Burg.)

Undyne's Sanctuary

1. Here we Are (Ooo)

2. Undyne (Alphys)

3. Do you hear the bells? (It's Showtime!)

4. Maze Game (Metal Crusher)

5. Cheater, Cheat, Soul Eater!

   (Original: Plays when you cheat the maze)

6. Frost Belt (Another Medium)

7. Golly, What a Chilly Day! (Uwa!! So Heats!!)

8. Megalo Strikes (Stronger Monsters)

9. Chilling at Glacier City (Hotel)

10. How can this be a Glacier City?! It is not as cold as the rest of the Glaciers!

11. Ladies & Gentlemen!

    (Original: Plays when you meet Announcer.)

12. Fight Against the Teevee Goons

    (Original: Plays when you fight Announcer's goons.)

13. Chase Sequence

    (Original: Plays when Announcer chases you)

14. Hustle n' Tussle

    (Original: Plays when you fight announcer.)

15. Meant to Be (Confession)

16. Anime Introduction (Live Report)

17. Anime Outroduction (Death Report)

18. The Last Nice Cream (Spider Dance)

19. NICE CREAM RECEIVED!

    (Original: Plays when you get the Nice Cream)

20. Back in my World! (Wrong Enemy!?)

21. Anime Romance Scene? (Oh! One True Love)

22. Anime Death Scene! (Oh! Dungeon)

23. Grillby's

    (Original: Plays when you enter Grillby's.)

24. Smoke Break (With Papyrus) (It's Raining Somewhere Else)

25. Here comes the Snowstorm (Core Approach)

26. Nucleus Snowstorm (Core)

27. WINTER SPECIAL! (Last Episode!)

28. You didn't... (Oh My...)

29. Mad Anime Warrior (Death by Glamour)

30. Doll in Pieces (For the Fans)

31. Progress Report (Variant 3)

    (Original: Plays after the Winter Wonderland.)

Ebott City

1. The Bridge (Long Elevator)

2. His Story (Undertale)

3. A Few Words (The Choice)

4. Have a Song that Will Play Only Once for Papyrus (Song That Might Play When You Fight Sans)

5. Falling (Small Shock)

6. The Exit (Barrier)

7. Cœur Brisé (Bergentrückung)

8. Queen (Asgore)

9. Forgiveness

   (Original: Plays when Toriel asks for forgiveness before her death.)

10. Thanks for the Help, Partner (You Idiot)

11. Dancing with Death (Your Best Nightmare)

12. Faint Hope (Finale)

13. The End...? (An Ending)

14. Progress Report (Variant 4)

    (Original: Plays after getting a neutral ending.)

Blessed Route

1. She's Trying to Play the Saxophone (She's Playing Piano)

2. Dangerous Mystery (Here We Are)

3. Isolated (Amalgam) [Forgotten Sanctuary]

4. Unexpected (Reprise) (Fallen Down (Reprise))

5. Endless Motivation (Don't Give Up)

6. Wishes for Monsterkind (Hopes and Dreams)

7. Destruction of Humankind! (Burn in Despair!)

8. Battle Against the Fallen Angel (Save the World)

9. Chara's Lament (His Theme)

10. Fulfilling Destiny (Final Power)

11. An Angel Gains Their Wings

    (Original: Plays when Chara's soul ascends away.)

12. Our New Home (Reunited)

13. This calls for a Celebration, Folks! (Bring It In, Guys!)

14. Farewell (Last Goodbye)

15. Progress Report (Variant Complete...?)

    (Original: Plays after the Blessed Route.)

Angel of Death Route

1. Different Path

   (Original: AoD Route theme)

2. Bereavement

   (Original: Asgore's AoD Route theme.)

3. Not a Comedian Anymore

   (Original: Sans AoD Route theme.)

4. Screaming for Help

   (Original: Plays when Susie sees through you in the AoD Route.)

5. Shining Hope for an Alpha's Reslove (But the Earth Refused to Die)

6. FINAL STAND (Battle Against a True Hero)

7. Pissed me Off (Power of Neo)

8. The Strongest Monster (Megalovania)

9. Angered Spirit

   (Original: Plays when you meet Asriel)

10. Farewell (Good Night)

11. Progress Report (Variant Complete) (Menu (Full))

Extras

1. comedic drums (trailer version) (Bontrousle (trailer version))

2. sensational song (PAPYRUS' COOL SONG)

3. GB_ww_1 (abc_123_a)

4. Lord of the Hammer (Gaster theme)

5. Dino Egg Oatmeal (Ice Cream)

6. Won't be Merciful (I Miss You)