Book subject: Junk collection
One thing developers often use to inflate play time is to have players do a variety of things not actually related to the story. This offers a little something for those players who consider themselves more "hardcore" and want to get 100% completed (or whatever strange number is the maximum, like 200.6%). Though sidequests do fall into this category, and are sometimes even hidden just as remotely, this chapter is going to address the idea of just finding junk laying around the game. Junk collection like this can be as meaningless as just collecting them for the sake of collection. They can also offer minor assistance to your character, which can pay off big once you have them all.