!! DISCLAIMER !! THIS POST IS NOT 100% CORRECT BUT RATHER AS THEORIZATION TO GIVE SOME STORY ELEMENTS SENSE SO TAKE THIS WITH A GRAIN OF SALT

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1983 - The Joy of Creation

Billy and Adrian are 2 young adult best friends who had the idea to make a family restaurant called ''Elias Dinner''

Billy first made a robot called Prototype JoaCo, used to interact with the kids, he wanted it for a future project.

He also made the first versions of Lucas, Leandro and a new character ''Helper''

They were all prototypes, so they were put on hold for later projects.

1984 - The Start

Billy and Adrian create a restaurant for the family called ''Elias Dinner'' Featuring animatronics as Santy, Curi, Titi, Nick, Toby and Elias.

George would always be taken by his father to see him repairing the robots when they malfunction.

At an unknown date an interview regarding the owners happened, all questions were being done to Adrian instead of Billy too, which grew a powerful sense of jealousy towards Adrian.

At an unknown date, Adrian is backstabbed by Billy in a secret room of the restaurant, and stuffed inside Elias. Billy would then cover this up by faking a car accident.

The day after that, Billy starts to regret his sudden action to himself in his house and plans to escape the city. As he grabbed the keys, he stopped to think for a second:

''No.''

''He meddled in my projects.''

''There must be no witnesses.''

At an unknown date, Billy also murders Adrian's oldest son Big Brother off-screen (No actual name confirmed), and stuffed him inside Toby.

Eventually the robots would start malfunctioning in showtime hours so a nightguard/mechanic was hired.

This behavior from part of the robots would later give George nightmares about them.

Billy just changed his name to remain unrecognized xd.

In Night 6 with Elias fully functional goes to try and kill Billy for his crime, but Billy remained triumphant in surviving.

In an act of anger Elias would destroy the robots Santy, Titi, Curi, Nick, and take Toby with him.

Billy would disappear and leave no trace, but the police arrived and saw elias spoil liquid out of his eyes.

With no robots to entertain the audience, Elias Dinner would close its doors.

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2014 - The 2nd Dinner

JoaCo Dinner would open its doors, featuring Characters such as JoaCo, Gaston, Tisi, Lucas, Leandro and Helper. With the elias suit being locked on the private room with the Prison Machine.

However, Billy had other plans for 3 specific characters: Lucas, JoaCo and Helper.

There must be not witnesses.

This is how the Prototypes were turned into killing machines for Billy so there were no evidences. Billy ordered those 3 to kill Adrian's young siblings and his spider mascot. Thing which they succeeded on.

The souls of the children and spider would not possess any animatronic, but rather be ghosts.

After Adrian's Wife took the notice of her children disappearing, she took the tragic and sudden decision to end her life, hanging from the tree on their home. Big Brother (now Shadow JoaCo) would see this act and give her mother new life. A new life to kill the one who took all they had away.

Days later multiple parents reported their children having nightmares with the main animatronics so a man called ''Daniel Brown'' would be hired as a nightguard. You know the drill.

At the end of Night 5, Shadow JoaCo using the Leandro Animatronic as a messanger to Daniel, would tell him to need his help. His father was locked on the private room, so he told Daniel to go to the Private Room on the backstage and turn off the Prison Machine.

That way, they will be freed.

Daniel turns off the Prison Machine, setting Mister free. Shadow JoaCo tells his father about this act. He was free.

Shadow JoaCo would pay Daniel a ''Thank You'' Visit in Night 8.

After the Night, Daniel reported several cases of ghosts haunting the place, but the management wouldn't believe him, so they fired him.

Without a nightguard to watch the place and a stained reputation, JoaCo's Dinner had no other Choice but to close its doors.

But a family fueled by hatred will continue their hunting.

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2024 - The End.

10 years after the infamous JoaCo's Dinner closed its doors for good, 2 friends called Rachel and Michael venture inside the abandoned location for an investigation of what is causing these sounds of lamentation Rachel has been hearing about.

Michael makes researches of each animatronic to attack, and Rachel fends off those animatronics who want to attack him.

Throughout each night, Shadow JoaCo would then reunite his whole family for the revenge.

During Night 3, Ghost Elias disappears from the abandoned JoaCo's Dinner and moves to Michael's house.

Michael mentions his father has the investigation, and when he returns he will go help rachel, in the middle of talking, Michael hears something and runs to the room.

After the night, Mister planned to kill Michael, but now that he has the prototype, he will let him live.

He then warns Michael for the last time for interfering in matters that only concern his father and him.

He mentions Michael the abandoned JoaCo's Dinner will burn down, that way everyone will be freed, so it's better if Michael hurries up to save his friend.

''It will be my last game for you.''

In Night 6, Rachel reunites with Michael. Michael mentions he has all the investigation of elias. In an act of immense rage and desperation, Shadow JoaCo interrupts their talk.

Shadow JoaCo and his family try their best to kill Rachel, while also burning down the establishment in the process.

Rachel passed the night, Michael arrived... but it was too late. He couldn't save his friend in time.

The abandoned JoaCo's Dinner burned down at 6:20AM. No one knows what caused the incident, but the police found the burned animatronics and the body of Rachel. But they didn't find the animatronic Elias.

The ghost family still hasn't found peace, not even after burning down JoaCo's Dinner, but one thing is true, one thing is correct...

They will not stop until the hunting is over.