Progressive Scan Mode (HDTV)
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.
Level Select:
Enter Down, Left, Left, Down, Left, Down, Right, Down, Left, Down as a code. Hold R1 at the main menu to select level.
Extra Special Features:
Enter Left, Down, Up, Left, Right, Up, Down, Left, Right, Down as a code.
Extra Items:
Enter Right, Right, Right, Right, Right, Left, Left, Left, Up, Up as a code.
Better Weapons:
Enter Right, Up, Down, Down, Up, Right, Right, Up, Down, Down as a code.
Easy Mode:
Enter Up, Down, Down, Down, Down, Down, Down, Down, Down, Up as a code.
Normal Mode:
Enter Up, Down, Up, Down, Up, Down, Up, Down, Up, Down as a code.
Difficult Mode:
Enter Down, Up, Up, Up, Up, Up, Up, Up, Up, Down as a code.