This document discusses games and game design. It defines what a game is, including that a game requires players, has rules, a goal, and interaction. Game design is described as every decision that affects the player experience. Games are broken down into their key elements - mechanics, aesthetics, technology, and story. Important designer skills are listed like communication, problem solving, and programming. The most important skill is said to be communication. Players are motivated by exploration, socialization, and achievement. Different player types are discussed based on age, gender, culture, and a player taxonomy. Key references on game design are also cited.