This will allow you to enter the Sister Location’s secret room. Input the code 1983 in the keypad next to the Celebrate poster. This is where things get tricky. Ennard is your final challenge ...

To truly complete Five Nights at Freddy’s: Sister Location, you’ll have to get ... Star #2: Gives you the “Private Room” keycard. Star #3: Unlocks “Butter” in the “Extras” menu.