Abstract
This chapter defines, explores and illustrates the terms "design", "design games", "game design", "codesign", "games", "serious games" and "gamification". It explores links between design and serious play. The chapter also identifies the different approaches people know about in order to design a serious game, illustrates it with examples and checks on a case-by-case basis whether the deep mises en abymes currently associated with the design game can also be found in the cases presented. The DICE model allows us to identify an iterative approach that leads to the creation of serious games, some of which may target the adult education market. In a design game approach, the idea is to gamify the design process. The chapter shows that the gaming experience depends largely on the player. Playing on the context to modify the game experience can be an approach used to influence the user experience around a design game.