3:48 Undertale OST - Gaster's Theme? 4:59 The Man Who Got Hands - DELTARUNE UST (Fan-Made W.D. Gaster Boss Theme) 1:48 What If Gaster's Theme Was a Full Song? 1:38 UTPR OST : Gaster p-1 : Darkest Hour 6:54 Glitchtale - Ascended (#4 Ascension) EXTENDED VERSION | by amella 0:36 Gaster's Theme but with Freedom Leitmotif 4:10 Gaster's Waltz (☼︎☜︎✞︎⚐︎☹︎✞︎☜︎) 4:00 The Worst Twist [V2] - STUDIOTALE OST 4:11 0am - Deltarune Chapter 7 (Fanmade Gaster Theme) 4:00 YOUR FAULT | DELTARUNE Chapter 6 UST (Snowgrave Gaster Final Boss Theme) [666/6] 2:42 [SCRAPPED] EXPERIMENTAL BREAKTHROUGH [DR. NOLI CHASE] (FORSAKEN) 8:26 I redesigned the most POPULAR Undertale AUs 2:15 A Prince's Lament (Vs. Ralsei) - Deltarune Chapter 5 Weird Route UST 0:41 H O W M U C H L O N G E R N O W ? 12:15 I Noticed Something Unsettling About Deltarune 1:37 Gaster's Theme (OST Version) - Undertale 5:05 Glitchtale OST - Vantablack [Gaster's Theme] 3:21 [Undertale] ENTRY NUMBER SEVENTEEN (W. D. Gaster battle theme) 2:12 UTPR OST : Gaster p-2 : Monolith 3:49 Underverse OST - Relight [XGaster's Theme 2] 3:30 Undertale 2 OST Gaster's Theme + Darker, Darker, Yet Darker Extended mp4 4:43 Glitchtale Animosity OST - W. D. Gaster fight Betty