3:48 Undertale OST - Gaster's Theme? 5:05 Glitchtale OST - Vantablack [Gaster's Theme] 1:48 What If Gaster's Theme Was a Full Song? 4:43 Glitchtale Animosity OST - W. D. Gaster fight Betty 1:38 UTPR OST : Gaster p-1 : Darkest Hour 3:23 UNDERTALE - Gaster's theme [ 8th Anniversary ] 1:37 Gaster's Theme (OST Version) - Undertale 0:26 Undertale Bits And Pieces - Gaster Room 5:45 Gaster's Theme [Undertale/Deltarune UST] 7:07 Deltarune - Boltzmann Brain (W.D. Gaster Theme) 3:49 Underverse OST - Relight [XGaster's Theme 2] 4:00 YOUR FAULT | DELTARUNE Chapter 6 UST (Snowgrave Gaster Final Boss Theme) [666/6] 4:09 GASTER'S SANCTUARY 4:46 Undertale - Gaster's Theme 【Intense Symphonic Metal Cover】 3:05 Gaster's Theme (PAL Version) - Undertale 2:11 WALTZ OF THE HANDSPOKEN - A Gaster Theme Take 3:30 Undertale 2 OST Gaster's Theme + Darker, Darker, Yet Darker Extended mp4 0:19 Gaster's theme with unnerving images 1:00 Why Gaster's Theme Sounds So Creepy #undertale #undertalemusic #deltarune #tobyfox 4:00 Undertale - Gaster's Theme (Extended by AI) Reupload 0:24 Undertale OST – Gaster's Theme (Samsung Cover) 0:35 Undertale - Gaster's Theme 4:30 Entry Number 17 - Dark Darker Yet Darker 4:25 [Undertale Remix] SharaX - Dark Darker Yet Darker