We list collectible items here chapter by chapter, in the order they’re picked up in our walkthrough. Note that in rare cases, the item listed in a chapter may actually be available earlier than we indicate in this location guide. Our goal was to minimize backtracking and create an efficient path through the game.
Also note that these are the true “collectibles” in the game. Other items like Locker Key statues or Ammo Pouches are good to collect, but they can be used actively during gameplay. The Files, Slides and Residual Memories listed here make the story deeper and richer, but you don’t actually “use” them during the game. (One exception: a collectible computer file found late in the game also gives you a four-digit code that you need to operate a key device.)