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.