Unity's coding model and architecture require knowledge of common software design patterns. To optimally code a game in Unity, in the same way you do in other engines, you'll have to adapt to programming techniques that involve the use of design patterns.In this second edition, you'll get to grips with using design patterns with the help of supplemented code examples based on actual implementations of game mechanics and systems of a playable racing game prototype. You'll be introduced to the core principles of reusable software patterns and how to employ them to build components efficiently. Some notable additions include a game design document (GDD), a Unity programming primer, and the downloadable source code of a complete prototype.You'll start by learning about the overall design of the core game mechanics and systems that you'll be building throughout this Unity book, and discover tried-and-tested software patterns to code essential components of a game in a structured manner. You'll also find out how you can use classic design patterns to utilize Unity's unique API features. Finally, you'll identify the negative impacts of bad architectural decisions and understand how to overcome them with simple but effective practices.By the end of this book, you'll be able to develop Unity games in a structured, scalable, and optimized way.