The document discusses alternate reality games (ARGs), which involve role playing or scenario-based instruction that may use mobile technologies. ARGs are interactive narratives where player actions can change the game. They involve movement between locations to collect clues and progress. Key elements include an immersive storyline, challenges for players to solve, and use of transmedia and technology tools. Examples provided include using ARGs to teach restaurant analysis, accounting practices, and microbiology. Augmented reality, QR codes, and location-based games are discussed as techniques within ARG design.