This book considers the four essential cores of game design: Mechanics, the interactive elements that allow players to be part and interact with the game itself; Economy, the resources and numerical concepts that will enable players to evaluate and consider the options in the game, creating strategy, risk, and fun; Narrative, the textual features that enable players to create and generate meaning for the game and its parts; and the Aesthetics, the audiovisual elements that allow players to experience the game through their senses and feelings.