Asriel Dreemurr is the true final boss of Undertale, coming after you've explored the bonus True Laboratory section. The following boss comes at the end of a complete Pacifist playthrough - in ...

However, choosing to go down the pacifist route in Undertale doesn't just change a brief cutscene at the end; it alters the entire story and introduces you to Asriel. Asriel is the son of Toriel ...