Unlockable - Scarab Rewards In Ninja Dog (Easy) and Normal Mode | |
| Life Of The Gods | 1 Scarab |
| Armlet Of Potency | 5 Scarabs |
| Life Of A Thousand Gods | 10 Scarabs |
| Spirit Of The Devils | 15 Scarabs |
| Dabilahro | 20 Scarabs |
| Armlet Of Celerity | 25 Scarabs |
| Armlet Of Benediction | 30 Scarabs |
| Great Sprit Elixer | 35 Scarabs |
| Armlet Of Fortune | 40 Scarabs |
| Jewel of The Demon Seal | 45 Scarabs |
| Arcade Ninja Gaiden | 50 Scarabs |
Unlockable - Difficulty Levels | |
| Ninja Dog | Die three times consecutively in Chapter 1., then accept the choices given to you. |
| Hard | Complete the game on Ninja Dog or Normal difficulty, or have a save file on your hard drive where you completed the original Ninja Gaiden on Xbox. |
| Very Hard | Complete the game on Hard difficulty, or have a save file with the clear data of the Hurricane Pack 1 |
| Master Ninja | Complete the game on Very Hard. |
Unlockable - Unlockables | |
| Movie Theater | Complete the game with any difficulty level. |
| Arcade Ninja Gaiden | Complete the game on Ninja Dog or Normal difficulty with the "Ninja Gaiden Arcade" item, or complete the game on Hard. |
| Coming Attractions | Play the game for over 1 hour. |
| Ayane-themed Start Screen | Load a Ninja Dog save file, and reset the game(start+back) |
| Unlock all music in "Sound Test" | Complete the game on any difficulty, and you will be able to listen to the game's music from the options menu. |
Unlockable - Scarab Rewards In Hard Mode | |
| Technique Scroll - Counter Attacks | 1 Scarab |
| Technique Scroll - Izuna Drop | 5 Scarabs |
| Plasma Saber Mk. II | 49 Scarabs |
| Dark Dragon Blade | 50 Scarabs |
| Technique Scroll - Guillotine Throw | 10 Scarabs |
| Windmill Shuriken | 15 Scarabs |
| Wooden Sword | 20 Scarabs |
| Dabilahro | 25 Scarabs |
| Armlet of Celerity | 30 Scarabs |
| Spear Gun | 35 Scarabs |
| Armlet of Benediction | 40 Scarabs |
| Armlet of Fortune | 45 Scarabs |
Unlockable - Unlockables - Costumes | |
| The Ashtar Ryu outfit (from the hurricane pack) | Defeat Ninja dog/ Normal |
| The Hotsuma Costume | Defeat Hard |
| The Ryuken (classic) Costume | Defeat Very Hard |
| DOA Throwback costume | Defeat Eternal Legends Mission |
Unlockable - Mission Mode Unlockables | |
| Mission Mode | Beat the game on any difficulty |
| More Missions in Mission Mode | Beat five missions to unlock five more |
| Play Missions on Multiple Difficulties | Beat a mission, and you unlock Hard for that mission. Beat Hard to unlock Very Hard, and Very Hard to unlock Master Ninja. Ninja Dog is not available. |
Unlockable - Golden Scarab Rewards In Very Hard Mode | |
| The Art of the Inferno | 1 Scarab |
| Spirit of the Devils | 5 Scarabs |
| The Art of the Ice Storm | 10 Scarabs |
| Jewel of the Demon Seal | 15 Scarabs |
| Spirit of the Devils | 20 Scarabs |
| Jewel of the Demon Seal | 25 Scarabs |
| Armlet of Fortune | 30 Scarabs |
| Jewel of the Demon Seal | 35 Scarabs |
| The Art of the Inazuma | 40 Scarabs |
| Spirit of the Devils | 45 Scarabs |
| Plasma Saber Mk.II | 49 Scarabs |
| Dark Dragon Blade | 50 Scarabs |
Unlockable - Golden Scarab Rewards on Master Ninja Mode | |
| Ayane's Rations | 30 scarabs |
| Ayane's Ration Bundle | 40 scarabs |
| Dark Dragon Blade | 50 scarabs |
| Fragrance of Dayflower | 35 scarabs |
| Fragrance of Hydrangea | 45 scarabs |
| Elixer of the Devil Way | 15 scarabs |
| Elixer of Spiritual Life | 5 scarabs |
| Great Devil Elixer | 20 scarabs |
| Great Spirit Elixer | 10 scarabs |
| Plasma Saber Mk. II | 49 scarabs |
| Smoke Bomb | 1 scarab, 25 scarabs |
Unlockable - Unlockable Armlets on Hard mode | |
| Armlet of the Sun | Buy it for 5,000 essence |
| Armlet of the Moon | Buy it for 5,000 essence |
| Armlet of Potency | Beat clone Ryu in the archives room |
| Armlet of Celerity | Give Muramasa 25 scarabs |
| Armlet of Fortune | Give Muramasa 40 scarabs |
| Armlet of Benediction | Give Muramasa 30 scarabs |
Secret - Play Japanese version of Arcade Ninja Gaiden | |
| After unlocking the arcade Ninja Gaiden at the main menu, change both text and speech to Japanese, and you will be able to play the arcade Ninja Gaiden in Japanese. | |
Secret - Hidden Windmill Shuriken | |
| This secret can be found just outside of Han's bar. If you are lucky enough, a hint in the form of a pink Kunai scroll will tell you to look for a special weapon left behind in an alley that "only a Ninja can get to". You can find this "alley" right outside of Han's bar to the left. After defeating the ninjas outside, turn to the alleyway and look up. You will see a series of blue strips throughout the alleyway in which you can use to run back and forth about the alley. Do this, starting with the first strip just outside of the alley, and then jump to the second and finally the third strip, all the while running along the wall. Once you hit the last strip, jump to the ledge right across from it. Here you will find the Windmill Shuriken embedded in the wall, and an "X-box" symbol that revives your KI energy and your life. Once you've taken the shuriken you can continue on with the mission with a new deadly weapon at your side. Good luck. Doesn't work in hard mode. | |
