Half-Life PS2 cheats

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Cheat codes

Enter the following cheats at the cheat code screen, found on the options menu. After each one press start to confirm. If done correctly, the name of the cheat should appear in a box to the right.

Invincibility - left, square, up, triangle, right, circle, down, X
Unlimited Ammo - down, X, left, circle, down, X, left, circle.
Unlock Alien Mode - up, triangle, up, triangle, up, triangle, up, triangle
Unlock Invisibility - left, square, right, circle, left, square, right, circle
Unlock Slow Motion Mode - right, square, up, triangle, right, square, up, triangle
Unlock Xen Gravity - up, triangle, down, X, up, triangle, down, X.


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