The Journal is a core element in the Amnesia games and serves as an item where all found documents are stored.
All notes and diary entries found in Amnesia: The Dark Descent are stored in Daniel's journal where they can be view again and reflected upon if needed. Daniel's mementos, which act as hints and objective reminders, are also in his journal. Since Amnesia: Justine is an expansion for Amnesia: The Dark Descent, the journal serves the same purpose as it does in the base game, it also uses the same model. No diaries or mementos are present in Amnesia: Justine, so only notes can be collected in the journal.In Amnesia: A Machine for Pigs, Mandus' journal looks quite different, and now has two categories: Found Documents, which contains every document that is picked up, and My Journal, which serves the same purpose as the mementos in Amnesia: The Dark Descent.