Unlock the following bonuses by performing the corresponding tasks:
BONUS - HOW TO UNLOCK Easy difficulty - Die ten times to unlock easy difficulty. QTE Easy difficulty - Miss the same QTE action ten times. Ninjitsu "Protective Barrier" - Complete all the missions under the Hard difficulty setting. Moonlight sword - Collect the nine Moji, then in Chapter 5, enter the new cave to obtain the large sword and upgrade it. Ninja Blade weapon Successfully complete Chapter 8. Tsuinetanarunaifu (Twin Eternal Knives) weapon - Get an "A" rank in all chapters, then upgrade the dual swords to the maximum. Twin Falcon knives - You can unlock the level 5 version of the Twin Falcon knives by earning an "A" or better rank on your overall score. Hence, you can have a rank of "B+" on some missions, as long as you have a majority of A ranks on other stages to unlock this weapon. Ninja Magic Ninjitsu - Complete the game under the Hard difficulty setting. Note - The QTE difficulty can be set to Normal.