an idea for a timeloop/groundhog day fnaf:sb AU, as presented by (throws confetti) meeeee
in this AU, you continually wake up/come to in front of the timeclock at the pizzaplex after having just clocked in for your first night on the job. You die, leave the building, manage to survive until 6AM? You black out and wake up at 12AM, standing right where you were six hours before. No one else seems to remember or realize what's happening unless you directly attempt to make them recall that you've met before. You can't seem to figure out how to get out of this timeloop, and if you're not careful, you might just lose your mind... again.
Lingering in mirrors around the 'plex are reflections of your past selves, the ones that were killed or survived or any other number of things. They tell you about their attempts to break the loop, about how to survive certain encounters with the dangers of the 'plex, give their best attempts at advice on what you could be missing that frees everyone from the cycle of dying and waking up again.
But one of these past selves is a little... off, even compared to the others. Turns out, in one of the most recent loops, you lost your mind and took the matters of life and death into your own hands. You had been killed numerous times- crushed, cut, bitten, bled out, suffocated, bludgeoned, dropped, strangled, stabbed- and at last had decided it was your turn to do some killing. And you had been good at it. You had killed every last moving thing in the building and spent the final hour watching the sun rise on a world that you hadn't touched in god knows how long. And you had felt free for the first time in... months? Years? How long had you been stuck here? Not even your reflections are sure.
To try and keep the loop from becoming a neverending bloodbath, your past selves kept the memories of every previous end from you. They give you advice, tell you of things that helped them, admit that you had bonded with certain animatronics during repeated run-ins over the course of several loops but that so far it had never amounted to anything and it never helped when said animatronic might catch and kill you before you got the chance to talk to them in the next loop, and tell you of every small bit of information they uncovered that might help you find the way out of this purgatory. You are your own last chance to get out of this now, you tell yourself. There has to be a way out of here. Otherwise, you might as well succumb to madness, though you know you already have.