This game is rated ESRB: Teen for Suggestive Themes, Blood, Language and Violence.
"The Sound Four" Extra Playable Characters Pack includes: 4 new playable characters: - Jirobo - Kidomaru - Sakon (Ukon) - Tayuya 3 Combination secret techniques: - The Seven Ninja Swords Men of the Mist - The Sound Ninja Four - Cold Assault of the Demon Blade Costumes from previous games Matching voice Ninja Info Card Picture Ninja Treasure Finish cut-in image
