Unlock the following bonuses by performing the corresponding tasks:
BONUS - HOW TO UNLOCK Music test - Complete the game under the Easy difficulty to unlock the "Music Test" option at the "Configuration" menu. Hard difficulty - Complete the game under the Normal difficulty. Toggle subtitles - Complete the game under the Normal difficulty to unlock an option to turn the Japanese subtitles during the cinematics on or off. Frame skip - Complete the game under the Hard difficulty. If the "Frame Skip" option is turned on, it disables the game's slowdown function. Game Speed option - Complete the game under the Hard difficulty. When the "Game Speed" option is set to "Turbo", movement will be twice as fast. Isa and Kachi mode - Complete the game as both Isa and Kachi. Press Minus in this mode to toggle between Isa and Kachi. Isa Variant - Complete the game in Tag-Team mode. Kachi Variant - Complete the game in Tag-Team mode.