These bonus features become unlocked when you complete the corresponding task in the game on the indicated setting.

Unlock Black Jaguar Costume:
Complete Path of Mentor mode.

Unlock Camoflauge Ninja Costume:
Complete the game on Warrior mode.

Unlock Red Ninja Costume:
Complete the game on Acolyte mode.

Unlock Golden Ninja Costume:
Complete the game on Path of The Master Ninja mode.

Unlock Music Test:
On any difficulty setting beat the game.

Unlock Old Film Filter:
On any difficulty setting beat the game.

Unlock Gamerpic;
Collect ALL 30 crystal skulls.

When you complete the game on the indicated setting the corresponding mode will become an available option.

Unlock Survival Challenge Mode:
Complete the game.

Unlock 'Path Of The Mentor' Mode:
Complete the game on the 'Path Of The Warrior' difficulty.

Unlock 'Path Of The Master Ninja' Mode:
Complete the game on the 'Path Of The Warrior' difficulty.

When you have completed the game on any difficulty setting and saved it when you are prompted you will retain ALL weapons, life, ninpo, items and essence you had in that game when you begin a new game on the same difficulty setting using that saved file.