Duration: ~3:08:23.

View commentary page!

Unreleased Tracks: (~10:13)

• (0:17) berdly_battle_heartbeat_true by Toby Fox
• (2:22) cybercity_alt by Toby Fox
• (0:06) d by Toby Fox
• (0:46) DELTARUNE Nintendo Switch 2 Announce Trailer Music by Toby Fox and Camellia
• (1:17) findher by Toby Fox
• (0:53) Fountain (unused)
• (1:09) Game Main Theme (Piano Sketch) by Toby Fox
• (0:17) Gaster's Theme by Toby Fox
• (0:41) King Boss (Orchestral) by Toby Fox
• (0:58) kris_piano_last_prophecy by Toby Fox
• (0:11) man by Toby Fox
• (0:41) Dog Check
• (0:35) Room of Dog by Toby Fox

Miscellany by Toby Fox: (~15:08)

• (3:33) 74 by Itoki Hana and Toby Fox
• (0:27) friend inside me by Toby Fox
• (4:30) Nightmare Knight by Toby Fox
• (1:46) Noisemaster Theme by Toby Fox
• (0:59) Patient by Toby Fox
• (_:__)no duration provided; treated as zero seconds long Penumbra Phantasm by Toby Fox
• (2:16) Terezi's Theme by Toby Fox
• (1:37) Theme by Toby Fox

Music from video games: (~48:46)

• (1:25) A Bad Dream by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (3:57) Aria di Mezzo Carattere by Final Fantasy, Nobuo Uematsu, and Yoshinori Kitase
• (0:33) Bad Morning to You by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (5:48) Bombs for Throwing at You by Portal and Mike Morasky
• (2:19) Boy Meets Girl by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:02) Cave Theme 1 by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:10) Choose a File by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:37) Dream Maze by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (2:12) Eternal Recurrence by Secret of Mana and Hiroki Kikuta
• (1:36) GADOBADORRER by Brandish and Naoki Kaneda
• (0:55) Giygas's Lair by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:18) Holding Back Tears by Final Fantasy and Ryuji Sasai
• (6:50) Kingdom Valley -Wind-The Castle-Lakeside-Water- by Sonic the Hedgehog and Mariko Nanba
• (2:41) Maya Fey - Turnabout Sisters 2001 by Ace Attorney and Masakazu Sugimori
• (_:__)no duration provided; treated as zero seconds long Moonsong by Cave Story and Daisuke Amaya
• (1:10) Mother 3 Love Theme by Mother and Shogo Sakai
• (_:__)no duration provided; treated as zero seconds long One Fateful Night by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:20) Onett by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:09) Power by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:05) Prologue by Mother and Hirokazu Tanaka
• (2:11) Sanctuary Guardian by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (1:42) Shapes by Night in the Woods and Alec Holowka
• (1:57) SNOW MAN by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (_:__)no duration provided; treated as zero seconds long Stage 7 (Kirby's Block Ball) by Kirby, Sukezo Ouyama, and Ryoue Takagi
• (3:24) Synchrony by Brandish and Mieko Ishikawa
• (0:55) Welcome, Me by Mother, Keiichi Suzuki, and Hirokazu Tanaka
• (0:30) What a Great Picture! by Mother, Keiichi Suzuki, and Hirokazu Tanaka

Traditional music: (~1:01)

• (_:__)no duration provided; treated as zero seconds long Das Lied vom Musikanten by Traditional
• (_:__)no duration provided; treated as zero seconds long Good Morning to All by Mildred Hill and Patty Hill
• (_:__)no duration provided; treated as zero seconds long Happy Birthday to You by Mildred Hill and Patty Hill
• (1:01) Jingle Bells (Country Feel) by WestNet
• (_:__)no duration provided; treated as zero seconds long Lacrimosa by Traditional
• (_:__)no duration provided; treated as zero seconds long Nocturne in E-flat major, Op. 9, No. 2 by Frédéric Chopin
• (_:__)no duration provided; treated as zero seconds long Silent Night by Franz Xaver Gruber and Joseph Mohr
• (_:__)no duration provided; treated as zero seconds long The Entertainer by Scott Joplin
• (_:__)no duration provided; treated as zero seconds long The One Horse Open Sleigh by James Lord Pierpont
• (_:__)no duration provided; treated as zero seconds long Yama No Ongakuka by Katsuhisa Hattori and Takatomo Kurosawa

Other music originating outside Undertale: (~1:53:09)

• (2:36) Amen, Brother by The Winstons
• (2:14) Captain Pronin Theme by Captain Pronin and Sergey Lemokh
• (4:06) Cascade (Beta) by Tensei
• (1:16) Casio VL-1 Demo by Unknown Artist
• (4:25) Descend by Toby Fox
• (1:41) Davesprite by Toby Fox
• (2:37) Doctor by Buzinkai and Clark Powell
• (3:03) Flare by Clark Powell
• (4:21) FRIEND INSIDE ME ♪ Last Rodeo Mix!~ by shadowkristal
• (2:06) Friend Inside Me (COVER) by lexxiemow
• (5:58) Green Ghost by Monobrow
• (_:__)no duration provided; treated as zero seconds long Into the Night by Twin Peaks and Julee Cruise
• (1:39) Lotus by Seth Peelle
• (2:47) MeGaLoVania by Toby Fox
• (2:58) Metroid Style by MasterSwordRemix
• (2:21) Moonsetter by Toby Fox
• (0:09) null by Toby Fox
• (4:11) PLAY DEAD! PLAY DEAD! by Vylet Pony
• (5:24) Separate Ways (Worlds Apart) by Journey
• (20:26) Soul Of Bobby - Part 1 - Instrumental by Bobby and Laxmikant-Pyarelal
• (20:31) Soul Of Bobby - Part 2 - Instrumental by Bobby and Laxmikant-Pyarelal
• (_:__)no duration provided; treated as zero seconds long Super Killer Robot by yuuDii
• (0:32) The National Spamton by Radio TV Solutions
• (4:47) The Shepherd's Boy by Doctor Who and Murray Gold
• (1:06) this is like... what was it... > [S] MSPAR: Remember by James Roach
• (3:33) Umbral Ultimatum by Toby Fox
• (1:58) unreeeal superhero 3 by REZ and Kenët
• (4:20) Upward Movement (Dave Owns) by Kalibration
• (2:04) You've Got a Friend in Me by Toy Story and Randy Newman

Other works originating outside of Undertale: (~0:06)

• (0:05) Flowey's Laugh by Warner Bros.
• (0:01) WOW by Mother