Some levels have been made much more creative and fun than the main game. But why was there a need to do these sections separately? Yes, the main game ends as if it was left unfinished, and these so-called "extra" chapters are the ones that need to be played. "Signal" is the first part you have to play after the main game, and unlike the main game, there are some creative gameplay mechanics where you shed light on some words and turn them into reality. Even though this is at the end of the main story, it does not appear integrated into the gameplay. In this regard, there were parts that I enjoyed more than the main story, especially in the combat parts. I recommend you play this episode, which has a gameplay time of approximately 1 hour, if you do not want to leave the story unfinished.