3:48 Undertale OST - Gaster's Theme? 0:35 Undertale - Gaster's Theme 1:48 What If Gaster's Theme Was a Full Song? 3:23 UNDERTALE - Gaster's theme [ 8th Anniversary ] 0:27 Gaster's Theme on an out of tune 1920s upright 0:59 Undertale - Fun 65 at Snowdin (Sound Test) Gaster's Theme 1:47 W.D. GASTER'S SHANTY 0:54 W.D. Gaster from DELTARUNE built it all from an empty room (reupload) 0:27 Pirate gaster 2:52 KillyKid - Gaster Theme Remix (Official audio) 0:24 dialtone reversed = gaster theme and more gaster connections with freedom leitmotif 0:36 Undertale OST: Gaster's Theme 0:40 Gaster's Theme (HD Samples) - Undertale 0:36 Gaster's Theme but with Freedom Leitmotif 4:25 [Undertale Remix] SharaX - Dark Darker Yet Darker 4:59 The Man Who Got Hands - DELTARUNE UST (Fan-Made W.D. Gaster Boss Theme)