Harvey's hidden audio log
The single most important piece of hidden content. In the game files, Harvey gives what amounts to his testimony:
"Eun-Mi stole everything from me: my son, my life, my happiness."
It reframes the series. The horror is not the torture mechanic — it is a father's love converted into a product by the person who was supposed to protect him.
Eun-Mi's research notes
Hidden in the files. They give you her side of the Human Expenditure Program without softening what she is doing.
Toby's dialogue
The Day 2 scene — "When is daddy coming back?" — is the one everyone remembers, but there is more Toby content to find. He is five, he has a hamster named Soups, and he has no idea his father is in the same house.
Finding all of it unlocks the Father's Love achievement.
Alternative dialogue branches
Conversation choices open branches most players never see. Responding to Eun-Mi differently, or challenging Harvey instead of comforting him, changes what you are shown.
Command prompt access
The command prompt is part of the True Ending. On Day 7, Harvey breaks through the screen and uses it to delete himself from existence — revealing Eun-Mi's identity to the world as his final act.
You only see it by reaching the True Ending.
Audio logs are missable — be thorough. Click everything, pay attention to background details, and document your choices across multiple playthroughs if you want every branch.