Undertale is about a game where a genderless child falls down a mountain into the monster world and you try to find the exit. there are a lot of endings along with the pacific's, genocide, and neutral routes.
the creator is toby fox.
there are four characters who can break the 4th wall, frisk (you), sans, flowey, and Chara (also you(in away)).
There are nine bosses including: Toriel, Papyrus, Undyn, Mtt (mtt ex and mtt neo), Muffet, sans, Asgore, omege flowey, asreal,
this page will be edited soon to give more stuff