Um. I need to ask something.

What *is* "The Backrooms" ... ? I don't mean what is the fictional world concept about, but what do you call the way that people are ... playing? Making? this ... RPG? Game? Campfire Story?

If you aren't familiar people interact with "The Backrooms" mostly by making up new areas that can be explored. It's like a RPG where everyone is the DM.

Is there a word for this?