This book explores how to use the Unity engine in a hands-on, practical way by looking at concrete examples that result in real-world playable games. Specifically, it focuses on the implementation of four distinct projects divided across eight chapters, two chapters per project. Let's take a look at what these projects are:

Chapter 1, The Coin Collection Game – Part 1, begins our journey into Unity by creating a first-person collection game. This is a great starting point if you're totally new to Unity and are ready to create your first game.

Chapter 2, Project A – the Collection Game Continued, continues from the previous chapter and completes the first project. It assumes that you have completed the first chapter and brings a closure to our project, leading neatly to the next chapter.

Chapter 3, Project B – the Space Shooter, marks the beginning of our second project, focusing on the creation of a space shooter game. Here, we'll create a project in which the player must shoot the oncoming enemies.

Chapter 4, Continuing the Space Shooter, completes the space shooter project, taking the project from its state in the previous chapter and adding final touches to it.

Chapter 5, Project C – a 2D Adventure, enters the world of 2D and UI functionality. Here, we'll explore Unity's wide range of 2D features in making a side-view platformer game that relies on 2D physics.

Chapter 6, Continuing the 2D Adventure, completes the 2D adventure game project that was started in the previous chapter, adding the final touches and linking it together with the overarching game logic. This is a great place to see how multiple parts and facets of a game come together to form a whole.

Chapter 7, Project D – Intelligent Enemies, focuses on artificial intelligence and creating enemies that can patrol, chase, and attack the player's character at relevant times, while cleverly navigating their way around the level.

Chapter 8, Continuing with Intelligent Enemies, brings closure to the AI project started in the previous chapter, as well as to the book content as a whole. Here, we'll see how to use finite-state machines to achieve powerful intelligence functionality that'll help us in a variety of scenarios.