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Cheats for Half-Life for PlayStation2
By Sierra

Here are all the known cheat codes for Half-Life for PlayStation2

Cheats, codes, hints, tricks, guides, and tips. Know any more?
	Down, X, Left, Circle, Down, X, Left, Circle, Start.	Unlimited Ammo
	Up, Triangle, Up, Triangle, Up, Triangle, Up, Triangle, Start.	Alien Mode
	Left, Square, Up, Triangle, Right, Circle, Down, X, Start.	Invincibility
	Left, Square, Right, Circle, Left, Square, Right, Circle, Start	Invisibility
	Right, Square, Up, Triangle, Right, Square, Up, Triangle, Start.	Slow Motion Mode
	UP, TRIANGLE, DOWN, X, UP, TRIANGLE, DOWN, X.	Unlock Xen Gravity
	Enter all these in at the Cheat Code screen in the Options menu. After each code Press START to confirm the code. If done correctly, the code will appear in the box to the right.