The phrase "about game design" refers to the topic or subject of game design. Game design is the process of creating the content, rules and structure of a game. It involves creating the characters, setting and storyline of a game as well as determining the goals, challenges and rewards for players. Game designers use various tools and techniques to create games that are engaging, challenging and fun for players. The phrase "about game design" could refer to a discussion, article or book that is focused on the topic of game design, its principles and techniques.