Ninja Gaiden Black

Play Ninja Gaiden:
Collect all 50 Scarabs and turn them in to the shop to receive the
Ninja Gaiden cartridge. Take this to Han's Bar and play it on the
arcade cabinet.

Unlock Arcade Ninja Gaiden:
Complete the game on Ninja Dog or Normal difficulty with the
"Ninja Gaiden Arcade" item. Or, complete the game on Hard.

Unlock Coming Attractions:
Play the game for over 1 hour.

Unlock Costumes:
Comic       - Complete the game on Ninja Dog or Normal
Normal      - Available at the Beginning
Red Muffler - Complete the game on Hard
DOA         - Complete "Special Mission."
Ryuken      - Complete the game on Very Hard

Unlock Mission:
Complete the game with the difficulty level over Normal.

Unlock Movie Theater:
Complete the game with any difficulty level.

Unlock New Missions:
The first 10 Missions will be available from the start. Once you complete
the first 5, and then 5 more will be unlocked. The rest follow in this
pattern (five at a time) until all 50 have been unlocked.

 