The four 'Memories' are the primary collectibles and narrative drivers in Among the Sleep. These appear as glowing, ethereal fragments scattered across the different chapters (Forest, Swamp, Attic). Your main objective in these chapters is to locate and collect them. Each memory represents a piece of your mother's fragmented past and her struggles.
Upon collecting a memory, you'll experience a brief, often disturbing, flashback sequence that provides glimpses into the mother's life and the events that have led to her distress. These flashbacks are crucial for understanding the game's overarching narrative and the symbolic meaning behind the distorted environments. Collecting all four memories is mandatory for progressing to the final chapter and reaching the game's conclusion.