GASTER'S ROOM | Undertale 10th Anniversary Fan Animation (serious version)

I got my hands on the build used during the 10th anniversary stream and saw what was inside the waterfall door! It's Wing Ding Gaster himself, in the flesh!!(bone) sorry for poor quality CREDITS TO DR. MELON FOR CREATING THE MANTLE GAME SEEN AT THE END: https://drmelon.itch.io/mantle Thank you @opie- for helping me code this and thank you @cm5g forfHAUHUAHUHHGHAHGHohfkKJFHHS ♥ --------------------------------------------------------------------------------- MY TWITTER - https://x.com/Botgotshot (stuff so youtube sees this) #undertale #undertale10thanniversary #gaster #frisk #eastereggs #secret #deltarune #deltarunechapter3 #deltarunechapter4 #deltarunechapter3secretboss #deltaruneost #deltarunechapter3ost #deltarunechapter4weirdroute #deltarunechapter4secretboss #deltaruneblackknife #deltarunechapter3weirdroute #deltarunechapter3secrets #deltaruneweirdroute #deltarunechapter4ost #deltarunechapter3egg #deltarunechapter3and4 #ralsei #deltaruneandundertaleost #deltaruneandundertale #deltaruneandroid #deltaruneandroidport #deltaruneandgandalfthegrey #deltaruneandundertalemusic #deltaruneandthefourthwall #deltaruneandundertaleartistsplaygarticphone #deltaruneandrewcunningham #deltaruneandundertalememes #deltaruneandundertalebossthemes #deltaruneandsilksong #deltaruneandundertalegarticphone #deltarunechapter5 #chapter5