The video above is the Wolfenstein The Old Blood Chapter 3 Collectibles Locations Guide and shows the locations of all Gold Items, Letters and Nightmare Levels in Wolfenstein Keep, the mission featured in Wolfenstein: The Old Blood.
Wolfenstein: The Old Blood features a Prologue and eight Chapters that include a total of 83 Collectibles divided into three categories:
64 Gold Items
10 Letters
9 Nightmare Levels
