The walkthrough contains detailed information about how to complete each chapter. Thanks to that, you won't get lost when searching for solutions to the riddles, and you will learn about the key choices in the story. The walkthrough focuses mostly on the "good" ending of the game, which means: every character survives. Because of that, the choices presented in this guide aren't the only good ones. They are the ones that are clearly leading to the good ending. However, because of the trophies that sometimes are given for "bad" decisions, information about the possibility to obtain a trophy can be found in the walkthrough. If you want, you can unlock them at any time after completing the game, by loading a selected episode. You will also find information about the collectibles that can be found. Before each new chapter a small meeting with the analyst (psychologist) will occur. Answers and decisions made there won't be very important, but they can impact the game world. More specifically, they can impact the player, changing some elements to match the answers (or contrary) - you can learn more about it from The Analyst chapter in General advices.