Seven Mysteries takes you to a small town in which only one school has been built. There are a lot of legends around it and most of them are far from cheerful. If you believe the rumors, then previously there were mass murders of students in the institution, which were carried out by otherworldly forces. The main character named Nathan moves with his parents to a new city and is forced to get a job at the only school, where after his transition the first murders immediately begin to occur. Together with other students, the protagonist is obliged to investigate crimes and find out the truth about the horror that lives within these walls.

For half of Seven Mysteries' gameplay, the player is forced to interact with non-player characters. In dialogues, you can respond by choosing from a variety of options. The further tone of the narrative and the development of the plot depend on such decisions. Through dialogues, the gamer learns most of the secrets of the institution. The user is obliged to think through his answer strategy as carefully as possible, because the ending depends on them. There are 2 main endings and 4 small branches.

Nathan devotes the rest of his time to exploring the large virtual world. It consists of a huge number of rooms – classrooms, restrooms, offices, abandoned basements and so on. While exploring the environment, you will also have to solve simple puzzles that involve finding and using objects. From time to time, in locations, the GG will encounter hostile monsters and will be able to observe frightening screamers. All this action is accompanied by a gloomy atmosphere and an intense soundtrack.