While there are multiple endings you can obtain in Five Nights at Freddy's: Into the Pit, the trickiest one is the three-star ending, also known as the "true ending." If you're wondering what you need to do to unlock it, here's our handy guide on how to get the three-star ending in FNAF Into the Pit.
FNAF Into the Pit – 3 Stars Ending Guide (Arcade Items, Vader Items, Secret Minigames)
If you want to get the three-star ending (or the "true" ending) in Five Nights at Freddy's: Into the Pit, you'll need to keep an eye out for various items and tasks as you play to ensure you unlock that specific ending.
While previous games in the Five Nights at Freddy's franchise required you to complete the hardest difficulty in order to unlock their respective "true" endings, that thankfully isn't the case with FNAF Into the Pit. You don't have to complete the game on Nightmare difficulty to get this ending. You can do it on the lowest difficulty if you want, and grab the "Family Fun Night" achievement while you're at it.
However, if you want the "Good job, sport!" achievement, you'll need to get the ending with three stars on the Nightmare difficulty, so make sure you prepare well for that.