Add Items 
     At  the Codes screen (in the Options menu), press RIGHT (5), LEFT
(3), UP, UP.
 
Difficult Mode 
     At the Codes screen (in the Options menu), press DOWN, UP (8), DOWN.
 
Easy Mode 
     At the Codes screen (in the Options menu), press UP, DOWN (8), UP.
 
Normal Mode 
     At  the  Codes  screen (in the Options menu), UP, DOWN, UP, DOWN,
UP, DOWN, UP, DOWN, UP, DOWN.
 
Old Soul Super Weapons 
     At the Codes screen (in the Options menu), press RIGHT, UP, DOWN,
DOWN, UP, RIGHT, RIGHT, UP, DOWN, DOWN.
 
Progressive Scan Mode 
     To use this, you'll need a TV with progressive scan capabilities.
Go  to  Options,  then  Codes  and enter: RIGHT, UP, RIGHT, RIGHT, UP,
RIGHT,  RIGHT,  RIGHT,  UP, RIGHT. You'll have to reboot your PS2 once
the screen turns blue.
 
Unlock All Levels 
     At  the  Codes  screen  (in  the Options menu), press DOWN, LEFT,
LEFT, DOWN, LEFT, DOWN, RIGHT, DOWN, LEFT, DOWN.
 
Unlock All Special Features 
     At  the Codes screen (in the Options menu), press LEFT, DOWN, UP,
LEFT, RIGHT, UP, DOWN, LEFT, RIGHT, DOWN.