An experience that will remain with a player, long after the credits roll is, in my opinion, the effectiveness of the story. Truly great games stick with you because of memorable story elements that made you laugh, smile or cry.
I've always felt that in order to understand people from another culture or a profession, you need to walk in their shoes. Or, in the case of the famous tanneries of Morocco, stomp barefoot in the byproducts of pigeons.
What the alchemy of Fes represents is something that is at the very heart of what so many of us who speak of social justice are striving for: a willingness to listen and to hear, to understand and to learn across cultures.