Ninja: Shadow Of Darkness Codes -

Level select:
Load the game and quickly press L2(2), R2(3) when the message "Checking Memory Card" appears. The phrase "Dels Level Cheat On" will appear to confirm correct code entry. A level selection screen will appear when game play begins. Note: All memory cards may need to be removed from the PlayStation before attempting the code. Alternately, press L2(3), R2(3).

Baby mode:
Press L2(3), Select(3), R2(3) when "Press Start" flashes at the title screen.

Big heads, hands, feet:
Press Select(3), L2(3), Select(3) when "Press Start" flashes at the title screen.

Invincibility and items:
Pause game play and press L2, R2, L2(3), R2(3), Circle, Triangle, Square, Circle, Triangle, Square. The ninja will turn into a skeleton to confirm correct code entry. Repeat the code to turn back into the ninja while keeping the extra items. Note: Pause game play and press L1, L2, L1(3), L2(3), Circle, Triangle, Square, Circle, Triangle, Square in the Japanese version of the game.

Big head, hands, feet, and invincibility:
Pause game play and press L2, R2, L2(3), R2(3), Circle, Triangle, Square, Circle, Triangle, Square. The ninja will turn into a skeleton and become invincible. Then, pause game play and select the "Quit Game" option to return at the title screen. This time, the ninja in the background will be a skeleton. Press Select(3), L2(3), Select(3) when "Press Start" flashes at the title screen. The ninja in the background should now appear as a skeleton, except with larger versions of the regular ninja's head, hands, and feet to confirm correct code entry.

Weaker Boss:
Pause game play during a fight with a Boss. Then, press L2(3), R2(3), Triangle(6).

All weapons:
Pause game play and press R2(3), L2(3), R2(3), L2(6). Repeat this code to select the next available weapon.