The Japanese version of The Squid Game is called Battle Royale because the story of the movie and the core setting of the game are both based on a "battle royale" of survival. The plot of the movie is based on a series of life-and-death scenarios where players have to win prizes, and the losers will be eliminated from the game. This setting is so similar to the concept of Battle Royale that the movie was named Battle Royale.