Half Life Cheats PS2
Alien Mode Half Life Cheat
Up, Triangle, Up, Triangle, Up, Triangle, Up and Triangle
Bonus Levels Half Life Cheat
Triangle, Square, Left, Right, Circle, X, Up, Down
Infinite Ammo Half Life Cheat
Down, X, Left, O, Down, X, Left, O
Invincibility Half Life Cheat
Left, Square, Up, Triangle, Right, Circle, Down, X
Invisibility Half Life Cheat
Left, Square, Right, Circle, Left, Square, Right, Circle
Slow Motion Half Life Cheat
Right, Square, Up, Triangle, Right, Square, Up, Triangle
Xen Gravity Half Life Cheat
Up, Triangle, Down, X, Up, Triangle, Down, X
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