Jason Gregory's book is not by chance a bestseller. Twenty years of work by the author on first-class games in Midway, Electronic Arts and Naughty Dog allow you to share knowledge about the theory and practice of developing software for the game engine. Game programming is a complex and huge topic, covering many issues. The boundary between the game engine and the game is blurred. This book focuses on the engine, basic low-level systems, collision resolution systems, physics simulations, character animations, audio, as well as the basic gameplay layer, including the game object model, world editor, event and scripting systems.