Sound Credits:
This occurs during your second Dark Prince transormation while in the courtyard immediately before a chariot race. In the corner of the courtyard, there will be a hole in the ceiling that respawns enemies until you leave the area. (Near the panel you need to stab and hang from to open the gate) Climb the closest pole to the hole in the ceiling and a female voice will start announcing sound credits for the game.

Ex: Sound Engineer -name-, Second Sound Engineer -name-, etc.

Sword Codes:
On the Pause Screen enter the following code:
Unlocks Swordfish Weapon Up, Down, Up, Down, Left, Right, Left, Right, Circle, Square, Circle and Square
Unlock Baby Toy Hammer Left, Left, Right, Right, Circle Square, Square, Circle, Up, Down
Unlock Telephone of Sorrow At the pause menu press Left, Right, Left, Right, Circle, Square, Circle, Circle, Square, Square
Secret King Sword Weapon Up, Down, Up, Down, Left, Right, Left, Right, Circle, Square, Circle, Square.
Secret Chainsaw Weapon Up, Down, Up, Down, Left, Right, Left, Right, Circle, Square, Circle, Square.