The Engagement Hierarchy →
The Engagement Hierarchy tries to graphically capture the idea that engagement is far more than a number. You can (and should) measure the retention of your game as best you can. But you also need to qualitatively understand what kind of engagement your game is generating, or trying to generate. Otherwise you might do stupid things, like try and sell poorly thought-out virtual goods to an audience that is so engaged that it finds such things cheapen their experience. Conversely, you might make the mistake of trying to charge subscription for a game that is really not valuable enough to warrant that kind of model.
