The Genocide route is the most challenging route in the game, requiring players to kill every monster in the underground world. Here's what you need to know:

: The barrier can only be broken by the power of . The Tragedy of Asriel & Chara :

The name "QuackPrep" is also used by developers as an example project name for exam preparation tools, as noted in developer forums. In short, QuackPrep is a game—it is a study tool.