3:48 Undertale OST - Gaster's Theme? 1:48 What If Gaster's Theme Was a Full Song? 3:23 UNDERTALE - Gaster's theme [ 8th Anniversary ] 1:37 Gaster's Theme (OST Version) - Undertale 4:10 Gaster's Waltz (☼︎☜︎✞︎⚐︎☹︎✞︎☜︎) 3:30 Undertale 2 OST Gaster's Theme + Darker, Darker, Yet Darker Extended mp4 4:16 An Enigmatic Encounter || Deltarune 8:08 If Deltarune Characters Had Minecraft 4:59 The Man Who Got Hands - DELTARUNE UST (Fan-Made W.D. Gaster Boss Theme) 2:38 KAIZO - Deltarune Secret Boss Theme 2:11 WALTZ OF THE HANDSPOKEN - A Gaster Theme Take 2:50 ROOTED HATRED | VS DEVICE_ROOTS - DELTARUNE Chapter 6 UST 3:21 [Undertale] ENTRY NUMBER SEVENTEEN (W. D. Gaster battle theme) 4:02 YOUR FAULT (MUSIC ONLY) | DELTARUNE Chapter 6 UST (Snowgrave Gaster Final Boss Theme) 4:00 YOUR FAULT | DELTARUNE Chapter 6 UST (Snowgrave Gaster Final Boss Theme) [666/6] 3:43 [Undertale] Gaster's Theme Remix - W. D. Gaster's Megalovania (amella Remix) 7:07 Deltarune - Boltzmann Brain (W.D. Gaster Theme) 4:25 [Undertale Remix] SharaX - Dark Darker Yet Darker 0:16 Gaster's Theme HIDDEN Secret 0:19 Gaster's theme with unnerving images