Goodbye, Stacey's Room

Unlock Condition: Complete all memories in Rockford's room.

Chapter: 10

This is story-related and cannot be missed. The trophy unlocks after completing the first major section of the game, once you leave Rockford's room at the end of Chapter 10. To ensure it pops, make sure you've interacted with every object and exhausted all dialogue with Cassandra and Slater during the bedroom sequences in Chapters 2 and 7.