The entire fnaf lore (as far as i know and am willing to write)

Summary (made by a friend /may include stuff that I didn't add )

*i may have missed some stuff bc i'm currently editing this at 4:07am, taking a shit with 10% battery left*

To put it (not-so) simply,

 it all starts with William afton, and his buddy named Henry. Afton was a dad, had a daughter named Elizabeth, a son named Micheal, and an unnamed (imma say Evan bc we literally never got confirmation on that) younger child, of whom is known as crying child, due to his constant crying in literally any situation. Now Afton and his buddy were geniuses that somehow created machinery centuries ahead of its time (fnaf starts in the 1980-2000's), and start a new diner of which had two functional kiddie entertaining robots, those being fredbear (a bear), spring Bonnie (a bunny), and the security puppet (a marionette).

Considering the amount of restaurants that existed, they were pretty successful. now another thing to mention, is that Afton (and only afton) is also a psychotic murder, and murdered what is possibly his first kiddie victim, although maybe not, some voice lines in UCN prove that chica (Susie) was the first victim. But this is the first victim shown in game at least, maybe he killed Susie but only did (stuff that is spoiling to the plot later on) after animatronics were able to be used, with that out of the way, this mofo killed his buddy Henry's daughter for some damn reason, his actions may or may not have purpose, but yet again, that's later.

There definitely was security puppet, but the kiddies inside the diner had seemed to use their aesthetic design against them, stacking boxes on the giant present they peek out of to check the area, of which they were able to push off, yet a bit too late considering the kiddies locked out Henry daughter, Charlie/Charlotte , of which gave afton a perfect time to kill. The puppet then went outside in search of her, of which it was raining, and since the puppet was an early design, water screwed her up, of which she broke down while laying near Charlie's corpse, of which seemed to somehow get her to possess the puppet. 

Now I could be screwing this all up, and it may have happened in the revamped location which is until later, but my brain isn't functioning properly considering it's like 3:26am rn and I am doing this from memory while shitting. 

With that out, now we go to crying child's pov. He was severely bullied by his older brother of who would terrorize him with a mask of the future face of foxy, for no (yet) explained reason. 

Another thing to mention is he had an attraction to Fred's, yet was also terrified by it, and would at times try to sneak into Fred's without his father's permission. He had some weird ass plush of fredbear that would talk to him in full length sentences. 

To prevent this, Afton had the genius idea to use genius tech ahead of even modern times, on his child, and make him have horrific hallucinations/nightmares of the future Freddy gang, and of fredbear, to deter him from trying to go back there, and our pal psychic friend fredbear? It seemed to be controlled with a microphone or something that William would talk to him or something like that. 

This didn't seem to work, and for some odd reason, Afton thought it would be a cool idea to also have his birthday party there. Micheal was also there, and with some of his own buddies, and they all had the great idea of grabbing crying child and put him inside of fredbear's jaw so that he could "kiss him", of which caused his head to get crushed, or something like that, and no, this is NOT the bite of 87 (sorry Markiplier, you were wrong), since it happened in the year 83 (television showing the show "fredbear and friends" proves this). 

Now, it is uncertain if crying child died or survived (as i am editing this for my friend, i can assure you he is deader than dead he is playing uno with Cassidy rn), and for a period of time it was considered that he was the protagonist we play as, of which is now false, but it seems to point towards him dying, and semi possessing golden Freddy.