Anarchy In The Nippon Fight as Sara, Bun Bun, Jacky, and Jeffry: Complete the game with each character with normal or greater difficulty. Fight as the Boss: Set the difficulty level to hard, number of rounds to two or more, then complete the game in single player mode. Big head fighters: Enable all characters, including the Boss and four bonus fighters. Use each of these characters to complete the game to access a big head mode option.