Ninja Gaiden Dragon Sword
Successfully complete all chapters to unlock the following bonuses.
- The "Prizes" option. This option allows you to view intermission sequences, letters, and character files that were found during your game session. Most are unlocked during game play by shooting the birds that appear when you use the microphone when a bird sound is heard.
- The Hard difficulty setting.
Muramasa's prize shop
Successfully complete the game under the Normal difficulty setting.
The Way Of Kunoichi difficulty
Select the Normal or Hard difficulty setting. Survive the fight with Ryu and defeat the dragon Boss to unlock The Way Of Kunoichi difficulty setting when a new game session is started. In this mode you will play as Momiji through the entire game.
Master Ninja difficulty
Successfully complete the game under the Hard (Head Ninja) difficulty setting.
Set the system date to your birthday. When the game is started you will hear a special "Happy Birthday" greeting when you tap the option to start the game.
Easy Yellow Essence
In Chapter 5, "Legendary Fiends", you will go to the Underground Mausoleum. There is an area in the Underground Mausoleum that consists of a bridge with two Zombie Archers shooting at you. If you fall from the bridge you will have to fight waves of Beetles before going back up. Fall off the bridge intentionally. As soon as you land, go to the back of the room at the right of the stairs. Charge your Ultimate Attack to red (if you continuously slide the stylus back and forth, it will charge faster than just holding it) and attack the Beetles. Collect the essence and charge the attack again. Continue doing this until all the Beetles are dead and you can leave, then jump off the bridge again. This can be done for as long as you are in the Mausoleum. Note: If a Beetle attacks you before you can charge, shake it off and roll to the other end of the area and charge it up. The Beetles will be unable to get there in time and you can charge the attack without interruption.
Strategy guides from GameFAQs