In this chapter you can find about an alternate ending of the game and learn how to unlock it. This chapter contains description for possible endings and the spoilers.
The developers didn't prepare anything that can influence the final scenes of the story significantly but there is one small change in the final sequence. After the apocalypse you are moved to St. Sybil as a child. You must go to the rooms behind the canteen where Jessica awaits you.
Depending on how many notes and recordings you got throughout the game the girl can have the marks on her neck left by the rope that she allegedly used to hang herself. If you found all elements then the mark won't appear on her neck meaning that you discovered the truth. Otherwise, her face is deathly white and you can see the mark on her neck.
Besides that the other elements of the game such as the events or dialog lines remain unchanged.