:/ Sadly, Fifteen divided by 3 Nights at Freddo's 1 (fdb3naf 1) has been taken down on Scratch, so it is unavailable to play anymore...

Because of this, I think it is time to reveal the LOOOOORRRREEEEEE of the first game in this series!
NOTE: Because fdb3naf 1 was originally a joke project, the gameplay/phone calls are NON-CANON!
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LORE:
You play as Matthew Appleton during this game. You are looking into your brother's disappearance during 1979 at the original FredBoy's Family Funland location, so you decide to get a job at the new Freddo Fazbone's Burgers 'n Fries, as this brand was a spinoff of FredBoy's (now the main restaurant chain).

While working there, the animatronics start to bug out, and you keep seeing this limp black bear suit with gold highlights around the place. It looks suspiciously like FredBoy, and you think you can hear it faintly whispering, "IS MEH."

You knew your brother was never very good at grammar, and you eventually discover on Night 6 that your brother, Christopher Appleton, was the victim of the Bite of '79, and he is possessing the Gilded Freddo (FredBoy) suit and influencing the other animatronics at the location to attack you, as he blames you for his death!

You end the game by fleeing the location and never going back, as being their is a threat to your life.
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To any theorists out there, I hope this lore helps, as it was not elaborated on at all in the game.

And for now,
GOOD DAY, MATES!