How to soberly evaluate your project? What prevents you from competently planning your work? What psychological characteristics of players should be taken into account? Creating video games is a special art. The developer's tool is not a computer, not game engines, but the brain. The book “Mistakes of Video Game Developers. From idea to failure" will explain how to avoid the most common mistakes, teach you to competently analyze the chosen direction, clearly assess your strengths and not give up on the path to your goal. Slava Gris is a solo developer, creator of Fearmonium, Catmaze and Reflection of Mine. He went from being a freelancer to running his own video game publishing house. His first book, “Make a Video Game Alone and Don't Go Crazy,” became very popular among readers. Being a master of psychology and a supervisor of many teams making video games, the author will consider the problems of developers taking into account the peculiarities of human thinking and talk about non-obvious ways of influencing the player. This book will be useful for novice developers who do not want to miss anything. The publisher's design is preserved in PDF A4 format.