Battle Royale was a novel similar to Squid Games. The novel was written by the Japanese author Hiroharu Takami. It was about a group of students who were forced to participate in a survival game. Every year, a group of students would be sent to a deserted island, where they would have to kill each other until only one of them survived. This novel was also adapted into a movie and manga.
The Demon Slayer game story often follows the main plot of the anime. It involves a world where demons exist and prey on humans. The main character, Tanjiro, embarks on a journey to become a demon slayer after his family is killed by demons and his sister, Nezuko, is turned into a demon. He has to face various types of demons, learn new techniques, and battle his way through different levels or areas in the game, all while trying to find a way to turn his sister back to human.
Tanjiro is one of the main characters. He is the protagonist who is determined to become a great demon slayer to save his sister. Nezuko is also important as she is Tanjiro's sister who has been turned into a demon. Zenitsu and Inosuke are other main characters. Zenitsu is a cowardly but powerful demon slayer with lightning - based abilities, and Inosuke is a wild - natured fighter with his own unique combat style.
It's hard to give you a precise number. Different versions or releases of the manga might have slight variations in chapter counts. Your best bet is to look it up on dedicated manga platforms or fan forums.
Squid Game is purely fictional. It presents a fictional world and scenarios that don't exist in reality. The plot and characters are all part of a fictional construct.