if you're wondering if the game can be beaten without cams, it can! you can win all the nights by audio cues, the steps are chicka or bonnie arriving at the door, at that point you have to guess which one it is based off how far you are in the night as bonnie usually is the first and you have to guess when they leave as bonnie usually takes longer, if you want to be extra safe turn on the light then open the door, close it instantly if theres still somebody at the door, for foxy you have to be fixated on the left door's red button, when you hear foxy humming "dun dun dun" CLOSE IT, and open the door when you hear a thud. but sometimes foxy dosent even hum before attacking so if you hear fast footsteps CLOSE THE DOOR as fast as you can.
Freddy can laugh 5 times (on the 6th night) and attacks on the 6th laugh, so close your right door at the 5th. and wait until you hear the 6th laugh pass then open the door.
Golden freddy is the only time when you open the cams, check on the posters, if they are regular freddy golden freddy is gone, if they are not she's still there.
I used this strat to beat 4/20 mode in which i think this game's 4/20 is harder because when there is an animatronic at the closed door and you turn on a light, they dont cast a shadow making you have to either guess when they are gone or check cams if they are in any room.
Good Luck to anybody using this strat because trust me you'll need it.