This paper offers an analytical description of the ethics of game design and its influence in the ethical challenges computer games present. The paper proposes a set of game design suggestions based on the Information Ethics concept of Levels of Abstraction which can be applied to formalise ethical challenges into gameplay mechanics; thus allowing game designers to incorporate ethics as part of the experience of their games. The goal of this paper is twofold: to address some of the reasons why computer games present ethical challenges, and to exploit the informational nature of games to suggest how to develop games with ethics at the core of their gameplay.