Battle Royale was a manga created by Japanese manga artist Yoshihiro Tomiken, which was later adapted into movies, TV series, and many other forms. The comic told the story of a group of students who formed a team to participate in the "Battle Royale" competition in order to escape the school's rules. This movie was very well-known and had a high box office in China and overseas. Although the theme of the movie is usually described as positive, some people might think that the plot and scenes are a little tense and scary. Therefore, the horror level of the movie varied from person to person.