Each hour, excluding the first hour, is 89 seconds. Try to have at least 5% power when there’s at least 44 seconds left in 5 am.
Sometimes another animatronic, Golden Freddy, will appear. You can get rid of him by pulling up the monitor for a few seconds, then putting it back down. You can also summon him by flipping camera 2B up and down repeatedly.
If Freddy is getting closer (i. e. East Hall or East Hall Corner), you may want to shut your Right Door whenever you check the cameras. Freddy is most likely to move when the monitor is raised. You can mostly only recognize him on the cameras by his glowing white eyes, so be aware of that.
Chica and Bonnie have the ability to make the doors and door lights fail completely, indicating they have infiltrated The Office and will attack when the monitor is next lowered or up for too long. Foxy is also very active, sometimes peeking out before 1 AM.
Just repeat this and you will (hopefully) survive the night, get a paycheck, and unlock the secret sixth night.
1 AM needs at least 80%, 2 AM needs at least 60%, 3 AM needs at least 40%, 4 AM needs at least 25%, and 5 AM needs at least 9%. Completing Night 6 will unlock Night 7 (the Custom Night).
Beating 20/20/20/20 mode will unlock a 3rd star. In order to beat 20/20/20/20, you need to be extremely fast and efficient. Perform and then repeat this process: Go to the east hall corner. Pull down the camera. Look at the right door light (close if needed). Look back at the camera. Pull down the camera. Look at the left hall light (close if needed). At the end of 20/20/20/20, you will get fired, and get the 3rd star. Foxy and Freddy won’t kill you unless you stop looking at the east hall corner, because Freddy will sneak into the room. Foxy will not kill you because having the camera up stops him, and if you do it fast enough, he won’t get a chance to move at all. You shouldn’t run out of power with the strategy explained above and if you do, you wouldn’t die because you’re so close to 6 AM.