3:48 Undertale OST - Gaster's Theme? 3:23 UNDERTALE - Gaster's theme [ 8th Anniversary ] 0:24 Undertale OST – Gaster's Theme (Samsung Cover) 4:30 Entry Number 17 - Dark Darker Yet Darker 2:36 Forsaken UST ~ Sans Chase Theme 9:13 【undertaleAU】Last breath sans phase3 animation ～Last breath～ 7:53 [Outdated UNDERTALE: Papyrus' BELIEF] First Half of Phase 1 12:39 Glitchtale Origins: GASTER | FULL ANIMATION (Season 3) 7:07 Deltarune - Boltzmann Brain (W.D. Gaster Theme) 1:08 Animating gaster with Plankton's voice 6:32 The Man Who Speaks In Hands - RednasVGM 1:48 What If Gaster's Theme Was a Full Song? 6:54 Glitchtale - Ascended (#4 Ascension) EXTENDED VERSION | by amella 3:43 [Undertale] Gaster's Theme Remix - W. D. Gaster's Megalovania (amella Remix) 4:43 Glitchtale Animosity OST - W. D. Gaster fight Betty 3:14 \"Cracks\" - Gaster's Theme (A Glitchtale Fan Soundtrack by Nevan Dove) 2:45 Gaster's Theme – UNDERTALE | Arrangement