This chapter considered the process of debugging, which is centrally about finding and removing errors from your game. There are many methods to achieve this end, especially in Unity. Specifically, the methods considered here included the Debug.Log statement, perhaps the simplest of all debugging methods. Using this technique, Debug.Log statements are inserted into your code in critical lines, and these print diagnostic messages to Unity's Console. Next, we looked at is custom defines: using them, you can section off and isolate blocks of your code between the release and debug versions; this allows you to run debug-specific code when specific flags are enabled. Then, we looked at error logging. This chapter demonstrated how to create an error logger class that integrates with native Unity's application class, using delegates. We also saw the profiler; the Unity profiler is a pro-only feature that gives us a high-level statistical insight into how processing is distributed over time...