Brain Out Walkthrough. Some of them can be as simple as Brain Out. This addictive and tricky puzzle game challenges your mind in a very interesting way. It consists of many levels that can get really tricky over time. There are no rules or any type of guidance to help you how to play. You will figure things out on your own and by playing you will realize that this game is really unique. All you have is a question, in order to understand how to finish the level and images/shapes to play with.