In this article, I investigate whether states should regulate energy-drink marketing practices targeting gamers. Energy drinks are high-sugar, high-caffeine, non-alcoholic beverages that allegedly improve energy, stamina, cognitive performance, and concentration. First, I define what “gamer” means and identify the market agents that play a crucial role in the gaming community, including the energy-drink industry. In doing so, I analyze energy-drink marketing practices and explore calls for regulating them. Second, I draw parallels between regulation of energy-drink marketing and marketing of products (...) such as video games and comics with explicit violent and sexual content, tobacco, alcohol, and food high in fat, sugar, and salt. Third, I examine arguments to justify regulation of energy-drink marketing practices that target gamers. Lastly, I formulate an autonomy-based argument for regulating such marketing practices. (shrink)