Educational alternate reality games (ARGs) are transmedia storytelling games that take place both in the real world and online. They involve collaborative gameplay where participants play as themselves to advance an emergent storyline. ARGs were originally developed for entertainment but can also be used educationally. Some benefits of educational ARGs include being low-cost, not requiring programming skills, and allowing for situated and contextual learning. Key differences when designing educational versus entertainment ARGs include focusing on learning objectives, ensuring all classroom students can participate, emphasizing collaboration over competition, and incorporating formative and summative assessments.