Undertale: Disbelief is a fangame of the popular indie game Undertale.
The description of Undertale: Disbelief (Demo)
Undertale : Disbelief is a fanmade continuation of the popular indie game Undertale, created by Toby Fox. It is built on a storyline written by flamesatgames in 2017, with many more never seen alternative endings.
It takes place in the judgement hall where you fight the beloved character Papyrus, who seems to be corrupted by a mysterious force.