Press Select and enter R2, Left, Right, Left, Left, Right, Left, R2.
Get large weapons
Press Select and enter Left, Square, Square, Square, Triangle, Triangle, Triangle.
Holy water bombs
Press Select and enter Right, Left, Square, Triangle, Square, Triangle, Left, Right.
Invincibility
Press select, go to the Journal Screen, and enter LEFT, RIGHT, RIGHT, LEFT, LEFT, RIGHT, RIGHT, LEFT, SQUARE, SQUARE.
Large fireballs to shoot
Press Select and enter Triangle, Triangle, Triangle, Left, Right, Right, Left, Left, Right.
Quick firing shotgun
Press Select and enter L2, Left, R2, Left, Triangle, Square, Triangle, Square.
Skip Level
Press select, go to the Journal Screen, and enter RIGHT, LEFT, RIGHT, LEFT, RIGHT, LEFT, SQUARE, CIRCLE, CIRCLE, SQUARE, SQUARE, SQUARE, SQUARE, CIRCLE, CIRCLE.
Unlimited Ammunition
Press Select during game play to enter the journal screen, then press Left, Right, Left, Square, Triangle, Square(2), Triangle(2), Square, Triangle, Square(2), Triangle(2). A flash will confirm correct code entry.
Unlimited soul energy
Press Select and enter Left, Right, Right, Left, Left, Right, Right, Left, Triangle, Triangle.
Big heads for demons...