Hello again my dude. Here is "to do" list for the completionist part of your perverted soul:
1. Finish 5 basic nights - to get both scenes of 4 major girls. One extra "game over" also lay on your desk in a form of a donut ( click the shit out of that glazed slut ).
2. Night 6 is next, obviously, good luck with that - it will grant you the custom night menu. Main source for most of the game secrets and pain in your ass later.
3. Play some custom modes: default 8/0/0/8 , good old 1/9/8/7 and 6/9/6/9 - they will unlock some plushies at the office, so you not gonna feel lonely while being raped by the Foxy in the final challenge.
4. 20/20/20/20 - may the Gods of Lust have mercy for your, cause those bithces definetly won't.