UP, UP, UP, UP, DOWN, DOWN, DOWN, DOWN. - Submitted By: Cheats Admin

Five Seconds for Half Life
Pause the game and enter this code to exchange five seconds of time for half of your life. - Submitted By: Cheats Admin

Half Life for Five Seconds
Pause the game and enter this code to exchange half of your life for 5 additional seconds. Enter:

UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, A, B. - Submitted By: Cheats Admin

Hidden Mode
Enter Arcade Mode and enter:

RIGHT,DOWN,RIGHT,X,UP,X,X,Y,DOWN,RIGHT,X,Y - Submitted By: Cheats Admin

Mirror Mode
Enter Arcade Mode and press:

LEFT,LEFT,RIGHT,X,DOWN,DOWN,UP,Y,UP,RIGHT,DOWN,UP,LEFT, DOWN,Y - Submitted By: Cheats Admin

Night Mode
On the Mode Select Screen enter:

UP, RIHT, DOWN, LEFT, UP, X, Y.

If you entered the code correctly you will hear "Silent Scope!" - Submitted By: Cheats Admin

Night Vision Mode
On the Mode Select Screen enter:

Hold the R-Trigger and enter:

START, START, START, START, START. - Submitted By: Cheats Admin

No Crosshair
On the Mode Select Screen enter:

RIGHT, RIGHT, RIGHT, X.

If you entered the code correctly you will hear an explosion. - Submitted By: Cheats Admin

No Enemy Targeting
On the Mode Select Screen enter:

RIGHT, RIGHT, RIGHT, RIGHT, LEFT DOWN, UP, RIGHT. - Submitted By: Cheats Admin

No Scope
On the Mode Select Screen enter:

RIGHT, DOWN, RIGHT, X, RIGHT, DOWN, RIGHT, X. - Submitted By: Cheats Admin

Professional Mode
On the Mode Select Screen enter:

Hold the R-trigger and press:

START, START, START, START - Submitted By: Cheats Admin

Professional Night Vision Mode
On the Mode Select Screen enter:

hold the R-Trigger:

START, START, START, START, START, START. - Submitted By: Cheats Admin

Romantic Mode
On the Mode Select Screen enter:

LEFT, RIGHT, RIGHT, X, Y.

If you entered the code correctly you will hear a voice say "Wow!" - Submitted By: Cheats Admin

Super-Fast Mode
On the Mode Select Screen enter:

DOWN, Y, UP, X, Y, DOWN, RIGHT, DOWN, RIGHT, X, Y.

Silent Scope Cheats from 123 Cheats
Silent Scope cheats for Dreamcast Cheats
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- Submitted By: Cheats Admin