Boss Fight Against W.D. Gaster! With commentary / reactions. Game made by Fantasy ruin x Play the game yourself! https://fantasy-ruin-x.itch.io/delatrune-gaster-fight More Deltarune Fangames! https://www.youtube.com/playlist?list=PLFlcvQw1GNxWPHr4VcixOPMbl-xkARW32 #Merg #Undertale #Deltarune Join my Discord Server! https://discord.gg/Vaz7r4T All footage and music used belong to their respective owners. Allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research.