Category – PS3 Cheats
PS3 Cheats Title – Ninja Gaiden Sigma
Bonus missions:
To unlock bonus missions, go to the mission mode screen and press up, down, left, down, right, up, square.
Mission mode:
To unlock Mission mode you must beat Story mode on Normal difficulty.
Unlockable difficulties:
Unlock the following difficulty levels by completing the corresponding tasks:
DIFFICULTY LEVEL