Scott Cawthon, the game's creator, stated that during development, he had nightmares about the character of Bonnie.

Scott Cawthon thought the extreme 20/20/20/20 AI customization would be impossible to beat, however a YouTuber named BigBugz managed to do it. Also, a YouTuber named Markiplier has a video explaining how to beat 20/20/20/20 mode.

The garbled phone message you get in Night Five is reversed speech quoting from the book "Autobiography of a Yogi," specifically a section that talks about how plants, animals and metals share a similar life force.

The "phone guy" is voiced by the creator of the game, Scott Cawthon.

Bonnie was the first animatronic in the game

On April 2015, it's been confirmed that Warner Brothers Studios is developing a Five Nights at Freddy's movie

There is a way to "kill" Foxy. On any night, you can close the door on him and theoretically kill him, but there is a very low chance of this actually happening.

"Golden Freddy" is listed as "yellow bear" in the game files.

The "Help Wanted" ad displayed at the start of the game has text surrounding it. The text is a combination of gibberish with real phrases thrown in, including "this ad has nothing to do with anything relevant to the game. Blah blah blah..."

One of the animatronics in the game, Freddy, is theorized to wait a night or two before attacking because he is studying your play style. However, this is likely not true, and is probably kept until night 3 due to his difficulty.

Scott Cawthon did modeling work on Foxy while on a bumpy car trip. Cawthon stated later he feels this is why Foxy ends up very broken in appearance.

Much of the game's backstory is hidden in the game on posters.

According to many posters in the game there was a kidnapping which resulted in five children going missing. Its believed that one of the mascots lured the children away. The unknown suspect was arrested for the crime, but the bodies of the five children were never found.

In the security area where the player is, there's a poster with the phrase "Celebrate" representing Freddy in the middle of Bonnie and Chica. If you click Freddy's nose, it will make a clown-like sound. This was added in order to reduce the players' stress while playing

Scott Cawthon had nightmares about the game. You also see hallucinations in the game within a millisecond, such as Bonnie and Freddy's face, and "ITS ME" words. These are confirmed to be visions in his nightmares. Bonnie also appears in the hallucinations the most, which is because Scott was scared of Bonnie the most.

In the custom night, if you change the settings to 1/9/8/7, a reference to the Bite of 87', right as you click "Ready", Golden Freddy will jumpscare you and crash the game.

Some fans believe Foxy is a good guy. If you don't check his room he will think something happened to you and run to check if you are ok. If you check his room too often, he will run to the office to calm you down. Also, that's why he doesn't attack you close up. Some believe he accidentally gives you a heart-attack. And some believe in the second game he jumps out at you because he just wants to give you a hug.

The jump scare screeching sound when the animtronic characters pop up is a heavily modified child's scream.

Foxy is hands down the most beloved character of the game. If you look up five nights at Freddy's fan art and fan fictions, notice the massive amount of artist and stories about Foxy.

This is one of the games who has the most theories by fans making their own opinions. And the creator haven't made his own story to the public yet.

Most teasers for the 3rd and 4th game when brightened up, have a secret message or image such as our second look at the springtrap character, or the word " nightmare ".

Before Five Nights at Freddy's, Scott Cawthon made a game called "Chipper and Son's Lumber Co." However, the reviewers thought that the characters looked like animatronics. Cawthon was even thinking about quiting the game development business forever! But, he used the bad reviews to his advantage and thus Five Nights at Freddy's was born.

In the trailer Bonnie is seen running down the hall but this doesn't happen in the final game. This was instead given to Foxy. Another thing scrapped was Bonnie removing his mask to reveal his endoskeleton but it was also scrapped.

Golden Freddy can get in the office even if both doors are closed. There is a way to "kill" (get rid of) Golden Freddy. The player can do this by flipping the cameras up and down repeatedly until he vanishes.

Freddy is the only animatronic that has two jumpscares and in his second one you will see that his eyes are black while in the other they are white some People beleive that in his second jumpscare the puppet is possessing him

Foxy is the only one to have a set path while the others have a complex AI.

According to the creator, Scott Cawthon, Bonnie is by far the scariest animatronic of the first game. When emailing someone, he said that he had multiple nightmares of Bonnie while developing the game (these nightmares could have been the reason for the existence of the Bonnie death screen) and even added that the other animatronics, never really scared him that much

A rumor surfaced about a special level if a player enters 1/9/8/7 in the custom AI mode. To dispel rumors, later updates of the game now give a player the "Golden Freddy" death-screen instantly if this combo is entered. There was also a rumor about entering 0/6/6/6 to enable the disabled camera in the kitchen but no such mod exists.

Foxy actually has no actual voice box. This is why he has a large hole in his chest, but oddly enough, he can still sing and make strange noises.

Chica is the only girl in the game, Bonnie, Freddy and Foxy are all boys.

Chica is not a duck like most people believe.

Initially Freddy wasn't going to move about at all but rather stay on the stage and only appear when the player runs out of power.

Scott Cawthon tried to launch a Crowd Funding Campaign to help fund the game but was unable to raise any money.

Within one year the game has had three sequels.

The concept of the game came when creator Scott Cawthon made another game called Chipper & Sons Lumber Co.. The game was a kid friendly game where you play as a beaver and plant trees. A famous game-journalist called "Jim Sterling" criticized that the characters looked like "scary animatronic animals." Cawthon was devastated and was considering giving up gamemaking. But one day he thought of making a game that was literally about scary animatronic animals.

The character names, Bonnie, Chica, Foxy, Freddy were character nicknames and not initially planned for the final names.

If you see a Golden Freddy poster anywhere,and go back to the office,you see Golden Freddy.Then, he jump-scares you and crashes the game.

When you are jumpscared by foxy if you slow it down you can hear "freedom!" but unplanned jumpscareing you. He is a friendly fox but stuffed you down his suit (like the bite of 87)

During his jumpscare, Foxy's ears clip through the door. He is also the only Animatronic in the game who doesn't jump up and screech in the player's face, instead appearing from the left door making his jumpscare the least scariest.

YouTuber Kevin Kevin is the 20th person known the beat the extreme 4/20 mode.

Golden Freddy or Fredbear has a deeper and longer jumpscare aswell as a lighter giggle every now and then. Golden Freddy is actually a hallucination and/or is child from FNAF 4 in the minigames at the end of the night.