Finally, there's the designer's loop. This is similar to the player's mental model, but this is the designer's mental model of the game. The main difference from the player's mental model is that the designer's loop is a perfect model of what the game and the player experience in the game should be.
The designer's loop is the game design process in itself. Iterating by designing and testing a game form the designer's loop, where the feedback given by someone playing the game and the difference between that player feedback and the designer's intent generates that iterative process has already been discussed.
