Sanity Meter

The Sanity Meter is an on-screen bar showing the sanity of the player. Seeing an animatronic through the cameras or in person or experiencing paranormal activity will gradually lower sanity. As sanity is lost, hallucinations will become more and more frequent, and when all sanity is lost, the hallucinations will kill the player.

Loss of sanity
81-90% sanity: The player may occasionally see morbid pictures and text replacing posters and signs.

71-80% sanity: Flashes of an animatronic's face may start to appear. This can make it more difficult to see.

61-70% sanity: Vision may randomly blur, the player may start to see bloodstains through and the cameras.

51-60% sanity: More macabre versions of the animatronics' faces will start appearing in vision, along with gruesome text such as "I see you" and "Behind you".

41-50% sanity: The player will start to see animatronics in the cameras that aren't there. Crying, screaming, laughing, or inaudible speech will start to be heard, making it harder to listen for threats.

31-40% sanity: The animatronics will start to have pitch-black eyes, ooze blood, and have wide grins or screaming mouths. The player will start trembling and make more noise when checking the cameras or radio.

21-30% sanity: Vision may go completely black for short periods of time. Animatronics will be seen in the entrances that aren't really there. Visions of Silver Silly and Meat Silly will start appearing.

11-20% sanity: Screaming and crying will now be much louder, the player will tremble more, the hallucinations will become much more horrific, and the player will start to see corpses.

1-10% sanity: The hallucinations will now completely block the screen for short periods of time, the screaming will almost drown out noises in the radio, the player will constantly see terrifying animatronics that are not there, and a very loud grinding noise will be heard.

0% sanity: A hallucination will jumpscare and kill the player. Whether it be a hallucinatory animatronic, Silver Silly, or Meat Silly, is up to chance.