The Reset function is found in the game's menu. If the player tries to load the SAVE in an inaccessible room (if the 'Dogcheck' was not turned off) or with corrupted data, the game shows the Annoying Dog in the middle of a black screen, rendering the game unplayable until it is fixed with a functional room or a new SAVE. For example, Toriel remarks that speaking with the protagonist is like speaking with an old friend, while Papyrus feels that they look familiar. Meta knowledge plays a heavy role in this since the protagonist and other characters have memories of events that occurred before resetting their SAVE. The game automatically loads the most recent SAVE whenever the protagonist's HP reaches 0.
A SAVE can be loaded via the game's menu.
