To do this trick you have to reach level 16 and lose to the boss. Then 'Continue' and get the Dark Dragon Blade pressing 'Start' when you view the cutscene where you get it. The cutscene with the final boss will now play.

Original Blue Ninja Costume:
At the 'Main' menu highlight 'New Game' and hold the Left Trigger + Right Trigger and press A


Wear the two new costumes for the Hurricane pack in Xbox Live

Dead or Alive Costume:
While selecting the 2nd trial mission hold the White button

Evil Costume:
While selecting the 2nd trial mission hold the Black button

Evil Ryu:
Beat the game on 'Very Hard' difficulty

Dark Dragon Blade:
Beat the game on any difficulty then play again and visit Muramasa's shop in chapter 13

Kitetsu Sword:
Defeat Doku at the end of Chapter 11. This sword will take health away slowly

Unlabored Flawlessness:
Buy the Wooden Sword and upgrade it to it's maximum Level

Windmill Throwing Star:
In a narrow alleyway down the street from Han's Bar. Use the narrow blue-striped area to venture into the back corner to find the item. Life of the Gods:
Give one scarab to Masamura

Sprit of the Devils:
Give 10 scarabs to Masamura

Armlet of Benediction:
Give 15 scarabs to Masamura

Dabilahro:
Give 20 scarabs to Masamura

Armlet of Fortune:
Give 30 scarabs to Masamura

Armlet of Tranquility:
Give 40 scarabs to Masamura

Ninja Gaiden 1:
Give 50 scarabs to Masamura

Ninja Gaiden 2:
Get Ninja Gaiden 1 and shoot the clock face in Tairon near Muramasa's shop

Ninja Gaiden 3:
Go to the peristyle passage in the Aquaducts, triangle jump back up to where you got the golden scarab on the top of the broken pillar

Play Ninja Gaiden 1 from the 'Main' menu:
Beat the game with Ninja Gaiden 1 in your inventory

Play Ninja Gaiden 2 from the 'Main' menu:
Beat the game with Ninja Gaiden 2 in your inventory

Play Ninja Gaiden 3 from the 'Main' menu:
Beat the game with Ninja Gaiden 3 in your inventory

Ninja of the Future Outfit:
Complete the game on 'Normal' or 'Hard' difficulty, then hold L and begin a new game

Plasma Saber:
Complete the game on 'Normal' difficulty

'Very Hard' difficulty:
Complete the game on 'Normal' or 'Hard' difficulty

Movie Gallery:
Complete the game on 'Normal' or 'Hard' difficulty

Unlock all Music in Sound Test:
Finish the game once on 'Normal'or 'Hard' difficulty

Level Select:
At the 'Continue' screen enter these codes in the 'Classical Ninja Gaiden' menu.

Skip to Act 1 in 'Classical Ninja Gaiden' 1:
L, X, A, Y, A, X

Skip to Act 1 in 'Classical Ninja Gaiden' 2:
A, A, B, X, Y, R

Skip to Act 1 in 'Classical Ninja Gaiden' 3:
B, Y, R, L, X, A

Skip to Act 2 in 'Classical Ninja Gaiden' 1:
A, X, X, R, Y, A

Skip to Act 2 in 'Classical Ninja Gaiden' 2:
X, L, R, B, B, A

Skip to Act 2 in 'Classical Ninja Gaiden' 3:
A, R, R, Y, A, L

Skip to Act 3 in 'Classical Ninja Gaiden' 1:
X, Y, B, R, L, X

Skip to Act 3 in 'Classical Ninja Gaiden' 2:
L, Y, B, A, R, R

Skip to Act 3 in 'Classical Ninja Gaiden' 3:
L, B, R, Y, L, Y

Skip to Act 4 in 'Classical Ninja Gaiden' 1:
B, R, A, B, Y, Y

Skip to Act 4 in 'Classical Ninja Gaiden' 2:
A, L, X, Y, Y, B

Skip to Act 4 in 'Classical Ninja Gaiden' 3:
R, R, B, A, Y, X

Skip to Act 5 in 'Classical Ninja Gaiden' 1:
X, A, Y, X, L, L

Skip to Act 5 in 'Classical Ninja Gaiden' 2:
R, A, A, B, X, L

Skip to Act 5 in 'Classical Ninja Gaiden' 3:
Y, A, B, X, R, X

Skip to Act 6 in 'Classical Ninja Gaiden' 1:
R, Y, R, L, A, X

Skip to Act 6 in 'Classical Ninja Gaiden' 2:
Y, L, R, A, Y, R

Skip to Act 6 in 'Classical Ninja Gaiden' 3:
B, X, X, A, X, Y

Skip to Act 7 in 'Classical Ninja Gaiden' 2:
B, B, X, Y, A, L

Skip to Act 7 in 'Classical Ninja Gaiden' 3:
X, R, X, Y, Y, L



Exchange Hurricane Pack Scarab Rewards:

Wooden Sword:
5 scarabs

Armlet of Fortune:
10 scarabs

Vigoorian Flail:
15 sacarbs

Armlet of the Moon:
20 scarabs

Dabilahro Sword:
25 scarabs

Armlet of the Sun:
30 scarabs

Armlet of Benediction:
35 scarabs

Jewel of Demon Seal:
40 scarabs

Armlet of Tranquility:
45 scarabs

Dark Dragon Blade:
50 scarabs

Alternate costume:
Successfully complete the game under the normal difficult setting. Then, hold L
while selecting the "New Game" option at the opening menu.

Plasma Saber:
Successfully complete the game under the normal difficult setting. A new sword
called the Plasma Saber will now be unlocked.

Extra hard difficulty:
Successfully complete the game under the normal or hard difficulty settings to
unlock the very hard difficulty setting.

Unlock all FMV sequences:
Successfully complete the game under the normal or hard difficulty settings to
unlock all FMV sequences.

Skip some FMV sequences:
Press Start, A, Start to advance past an FMV sequence.