Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
After purchasing this item, you will be able to change the BGM for 'Shinobi Transformation' and 'Frantic Mode' with the 'Switch BGM' option in the game's settings.
