I think use of second person in a role-playing-game (say Dungeons and Dragons) and its use in prose are really completely different things.
I never thought about the connection between text-adventure type situations (or D&D type gaming) and second person narratives, but
@HareBrain has (almost) converted me.
This is an interactive story (you influence the paths and outcomes). The text comes from a gamemaster who is not an NPC, because they don't take part as a character in the game. They play the role of narrator. The interactive story is narrated in second person.
The thing that muddies the water for me is that the narrator can sometimes respond to your questions with an "I don't understand ..." which breaks some wall somewhere, bringing the narrator into the story.
Add. For someone not familiar with ye olde text adventures, here is a snippet from a run of
Zork
>walk east
Behind House
You are behind the white house. In one corner of the house there is a small window which is slightly ajar.
>open window
With great effort, you open the window far enough to allow entry.
>enter house
Kitchen
You are in the kitchen of the white house. A table seems to have been used recently for the preparation of food. A passage leads to the west and a dark staircase can be seen leading upward. To the east is a small window which is open.
On the table is an elongated brown sack, smelling of hot peppers.
A bottle is sitting on the table.
The glass bottle contains:
A quantity of water