Anarchy In The Nippon (Saturn)
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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.
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.