Fanmade Undertale Sequel about W.D. Gaster! With commentary / reactions.
Play the game yourself!
http://gamejolt.com/games/undertale-don-t-forget/150752
Don't Forget is an Undertale fangame made by RickyG. It takes place after a True Pacifist playthrough and focuses in particular on the former royal scientist, Doctor W.D. Gaster.
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.