Half-Life PS2 cheats

# Invincibility

At the cheat menu, press Left, Square, Up, Triangle, Right, Circle, Down, X.

# Infinite ammunition

At the cheat menu, press Down, X, Left, Circle, Down, X, Left, Circle.

# Invisibility

At the cheat menu, press Left, Square, Right, Circle, Left, Square, Right, Circle.

# Slow-motion mode

At the cheat menu, press Right, Square, Up, Triangle, Right, Square, Up, Triangle.

# Alien mode

At the cheat menu, press Up, Triangle, Up, Triangle, Up, Triangle, Up, Triangle.

# Xen gravity

At the cheat menu, press Up, Triangle, Down, X, Up, Triangle, Down, X.

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Game Shark Codes

Master Code (Must Be On) EC8783A8 1431D934

Unlock Alien Mode Cheat 4CA573BA 1456F025

Unlock Infinite Ammo Cheat 4CA57372 1456F025

Unlock Invincibility Cheat 4CA5735A 1456F025

Unlock Invisibility Cheat 4CA5738A 1456F025

Unlock Slow-Motion Cheat 4CA573A2 1456F025

Unlock Xen Gravity Cheat 4CA57342 1456F025

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To kill the final boss, you need to shoot the big yellow crystals which are located around the top of the big chamber. Then, when they are gone, use the things on the ground which make you bounce into the air and keep using them until you find yourself far above the Boss. Keep firing at his head until it opens. Once it is fully open. Use the bouncer things to get above him again, and shoot his brain. Repeat this and he WILL DIE.

P.S. Make sure you save as he starts to die as it is really funny to watch ROFL.
P.S.S When you are in the train with Gman after you kill the boss, he offers you a job. ACCEPT IT or you bassicly fail the Game.

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To get into the room where you see Gman speaking with a scientist(before the accident), be an alien(Alien Mode) and you can break the glass. You can kill the scientist, but not Gman.

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This is one of the biggest secrets and most awsome weapons in Half Life.
All you have to do, is kill Gman when you see him. I know that you might fire every rocket laser bullet or bomb you have at him, butthe trick to killing him is to be quick enough to catch him. If you catch him, hit his breifcase on the handle (not Gmans hand or it wont work) with your pistol and his cas opens! Inside there is some paper, a gun, an ID, a poket pc and more notes. But, Gman turns around and starts to talk to you. When he is done, he pulls out a gun, and starts to count down from 10 until he kills you. Kill him first, blow up the body and you get the gun!Then gun fires headcrabs at people or animals and makes them fight for you. The gun also fires a laser that can go through any wall, allowing you to PROPERLY explore.

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Triangle circle circle x x traingle triangle

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Up down right circle up down right circle

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At the cheat menu, press: Triangle, Square, Left, Right, Circle, X, Up, Down.

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All the cheats you want cheat gives you all the cheats you want just press up up up up down down o o o o o and thats it

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Traingle traingle xxx circle circle circle

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At cheat menu press up up up down down down o o o o up left right down

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Up down circle ex up down circle ex

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Mess up mode makes you enter a really big room getting all these menus. all the monsters cops scinentist guns and you can pause the charactars/ they give you a littel box that you can type the name of the gun you want.

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Up4x down4x x3x

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