In this chapter, we learned about the State pattern, which is a way to allow a game object to change its behavior and functionality in response to different stimuli within the game. We learned about the State and the Context (Machine) and how they are used together. We then learned how we can use the State pattern to gain some exposure toward AI programming, as well as how our project's Game State Manager works and why it's important. Of course, FSMs are most popular in being used for AI, but can also be used in UI as well as dealing with user input, making them another useful tool to have in your arsenal.