Check out this article from the Indie Illuminati.
Several bestselling stories including Brian D. Anderson’s new release The Vale are GameLit as a whole, but may not necessarily be classified as LitRPG. Brian’s writing is so highly acclaimed, that prior to The Vale’s official release, audiobook giant Audible gave him a six figure offer for exclusive rights to the story. The concern of reader confusion between GameLit and LitRPG however is real. I quote Brian in a recent Facebook comment, “It’s funny. A ton of my ‘also boughts’ are LitRPG’s. I hope they don’t think The Vale is LitRPG or I’m in store for some pissed off reviews.”