If the player deletes Monika's character file before playing a fresh game,Spoiler: Sayori will become aware that she's in a game and begin to panic before deleting all the remaining character files, resulting in an "END" screen with a chromatic image of Sayori's suicide.
During Act 3, if the player is recording through OBS or similar software, Monika will address the audience and then perform a jumpscare.
During Act 3,Spoiler: Monika will make a short reference to the Super Smash Bros. series of games. She says the following sentence. "Hey, have you heard of a game called Super Sma--". She then interrupts herself and continues the conversation.
The credits scene begins with static, which slowly resolves into a scrolling sequences of distorted images. These images appear to be distorted and discolored versions of Monika.
During the first act, Spoiler:Yuri mentions how she has a large collection of intricate knives, however she stabs herself with a large, plain kitchen knife. Dan Salvato, the main developer of the game, later confirmed in a Reddit AMA that this was an artistic error.