Secondary Weapon as Chainsaw:

Up, Up, Down, Down, Left, Right, Left, Right, Circle, Square, Circle, Square

Toy Hammer:

Left, Left, Right, Right, Circle Square, Square, Circle, Up, Down

Telephone of Sorrow:

Left, Right, Left, Right, Circle, Square, Circle, Circle, Square, Square

Swordfish:

Up, Down, Up, Down, Left, Right, Left, Right, Circle, Square, Circle and Square

Unlocks

Deactivate 1 Sand Gate: 4th Sand Tank

Deactivate 2 Sand Gates: 100 Sand Credits

Deactivate 3 Sand Gates: Eye of the Storm Time Power

Deactivate 4 Sand Gates: 5th sand Tank

Deactivate 5 Sand Gates: 150 Sand Credits

Deactivate 6 Sand Gates: Winds of Sand Attack

Deactivate 7 Sand Gates: 6th Sand Tank

Deactivate 8 Sand Gates: 200 Sand Credits

Deactivate all 9 Sand Gates: Sand Storm Attack

Video Gallery: Complete the Game

Sound Credits

After the second time you transform into the Dark Prince, you'll be headed for a chariot race. While in the courtyard just before it you'll notice a hole in the ceiling through which enemies spawned before. Climb the nearby pole and listen closely in the direction of the hole, where a female voice will be reading off the credits for the game's sound crew.

Power up early
If you want to raise your abilities and get sand credits quickly, simply do the following. Kill all the enemies near a sand gate. Kill yourself by falling, or allow a guard to kill you. After you get the game over screen, do the section over, and this time, when you stab the sand gate you'll get the reward that you were supposed to get from the next fountain.