If you want to master your game, you must first learn to master yourself. The world of esport is developing at a constant velocity, paving the way for technological competitions across the globe. The athletes participating at all levels are facing immense opportunity and serious difficulties. How can we meet these opportunities and problems in a way that lets us grow as individuals, teams, leaders, and organizations? This book examines how psychology can help esports athletes, coaches, managers, and organizations build durable and long-lived careers. By using essential psychological theory and method, it explores how you can make the most of your gaming, and reach the top of your capabilities, both in-game and IRL. The book features two parts: First, a theoretical walkthrough of how psychology can help the esports world, with considerations about the typical esports careers, team development, and personal development. Secondly, a dive into methods and models to use psychological theory from sports psychology and business psychology to develop yourself and your team (all models and methods from the exist in a printable version in the appendix of the book). When you have read this book, you can expect to have a greater understanding of the psychological factors of esport. You will have gained tools to develop yourself and your team in tune with sports - and business psychological research from the last five decades. If you take the time and effort to practice these new insights and tools, you will be on your towards mastering yourself - to master your game!