3:48 Undertale OST - Gaster's Theme? 1:48 What If Gaster's Theme Was a Full Song? 0:24 Undertale OST – Gaster's Theme (Samsung Cover) 5:05 Glitchtale OST - Vantablack [Gaster's Theme] 1:25 Animated [Undertale Remix] SharaX - Dark Darker Yet Darker 6:19 【Void Time Trio】- [ Phase 4 ] 『 Geometric Never-Ending Crisis 』[GENESIS] 4:00 We Don't Talk About Gaster - An Undertale \"Encanto\" Cover & Animatic 10:08 Undertale last breath phases 1-3 theme 4:00 YOUR FAULT | DELTARUNE Chapter 6 UST (Snowgrave Gaster Final Boss Theme) [666/6] 2:37 ПЕСНЯ ГАСТЕРА | [ОПЫТ №17] ПЕСНЯ | Undertale гастер | АНДЕРТЕЙЛ / песни андертейл / гастер песня! 3:01 Gaster's theme - Walde remix 3:16 Soundtrack Gaster 3:18 Undertale - \"Gaster's Theme\" [Advanced Piano Cover] || DS Music 0:38 What Happens If You Call Papyrus In Gaster's Room? 2:52 \"His Theme\" from Undertale gets an 8-bit/Vocaloid cover 3:21 [Undertale] ENTRY NUMBER SEVENTEEN (W. D. Gaster battle theme) 0:35 Undertale - Gaster's Theme 4:25 [Undertale Remix] SharaX - Dark Darker Yet Darker 4:43 Glitchtale Animosity OST - W. D. Gaster fight Betty 2:28 Dark, Darker, Yet Darker (Remix of Gaster's Theme) 1:30 Gaster's theme in \"Nyeh heh heh\" ...? 3:43 [Undertale] Gaster's Theme Remix - W. D. Gaster's Megalovania (amella Remix)