Silent Scope [PSX]

Voyeur Mode:
X, Circle, X, Circle, Triangle, Triangle, Triangle, Triangle, L1, L2, L1, L2.

Get rid of the aiming rings and enemy markers:
Hold trigger, press start, continue holding the trigger, now highlight mode, press start x4.

Hidden mode
At the mode selection screen, press Right, Down, Right, Square, Up, Square, Square, Triangle, Down, Right, Down, Right, Square, Triangle.

First person view
At the mode selection screen, press Up(4), Down(4).

Pink mode
At the mode selection screen, press Left, Right(2), Square, Triangle.

1 int. mode
At the mode selection screen, press Down, Triangle, Up, Square, Triangle, Down, Right, Down, Right, Square, Triangle.

No crosshair
At the mode selection screen, press Right(3), 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(4), Left, Down, Up, Right.

Exchange a half of life for 5 seconds
Pause the game in story mode and press Up(2), Down(2), Left, Right, Left, Right, X, Circle.

Exchange 5 seconds for half of life
Pause the game in story mode and press Circle, X, Right, Left, Right, Left, Down(2), Up(2).

100 challenge mode
Successfully complete all nine outdoor shooting range challenges to unlock 100 challenge mode.

Unlimited time:
Pause the game in arcade mode and press Square, Square, Square, Circle, X, R1, R2, L2, L1, Triangle, Select.

Extra options
Successfully complete the game on any difficulty setting to unlock a real time window and up to 8 health in the options menu. Successfully complete the game more that twice on any difficulty setting to unlock infinite credits in the credits 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.