Things start to come together with M. Night Shyamalan, hit-yourself-in-the-forehead obviousness. The “you” in “you are mountain” doesn’t refer to the terraformed 3D game object, at all. Instead, it describes the game itself. You are not mountain; rather, you are Mountain. You play as the abyss between the human and the alpine.
Two things are particularly great about this: (1) Bogost writes about the actual experience of playing the game in stead of the idea of the game (2) he pulls in the larger media ecosystem to further illuminate the significance of the work.