Silent
Scope
Hidden mode:
At the mode selection screen, press Right, Down, Right, Square, Up,
Square, Square, Triangle, Down, Right, Down, Right, Square, Triangle.
Mirror mode:
At the mode selection screen, press Left, Left, Right, Square, Down,
Down, Up, Triangle, Up, Right, Down, Up, Left, Down, Square.
First person view:
At the mode selection screen, press Up, Up, Up, Up, Down, Down, Down,
Down.
Fast mode:
At the mode selection screen, press Down, Triangle, Up, Square, Triangle,
Down, Right, Down, Right, Square, Triangle.
Romantic mode:
At the mode selection screen, press Left, Right, Right, Square, Triangle.
Night mode:
At the mode selection screen, press Up, Right, Down, Left, Up, Square,
Triangle.
No crosshair:
At the mode selection screen, press Right, Right, Right, Square.
No scope:
At the mode selection screen, press Right, Down, Right, Square, Right,
Down, Right, Square.
No enemy cursor:
At the mode selection screen, press Right, Right, Right, Right, Left,
Down, Up, Right.
Exchange ½ of life for 5 seconds:
Pause the game in arcade mode and press Up, Up, Down, Down, Left,
Right, Left, Right, X, Circle.
Exchange 5 seconds for ½ of life:
Pause the game in arcade mode and press Circle, X, Right, Left, Right,
Left, Down, Down, Up, Up.
Extra options:
Beat the game under any difficulty setting to unlock a real time window
and up to 8 health in the options menu. Beat the game more than twice
under any difficulty level to unlock infinite credits in the credit
section of the options menu and +30 in the time limit section.
Mouse Aiming:
You can use an USB mouse for aiming and left and right click for shooting.