Women didn't do the underground murder. According to the official setting of murder in undertale, the murder is a man, who forms a team with KillerSans, HorrorSans and InsanitySansMurderTimeTrio, members of DustSans. Undertale is a role-playing story game, which is unofficially translated into Undertale in Chinese. It was published by TobyFox on Steam on September 65438, 2005.