Area 51 Cheats

Also see Codebreaker Codes for Area 51

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2th boss

on the 2th boss stay in moister mode to kill hem
Verified by: this cheat is unverified Submitted by: jay on October 13, 2008

Blast The Turrets

Once Cole beats all the guys in the big room with the turrets, all you have to do is run straight at the turrets until you hit the gate. Then just aim up and shoot the turrets until the blow up. The turrets can't shoot back because they can't rotate far enough to aim at you.
Verified by: this cheat is unverified Submitted by: anonymous on January 24, 2006

Defeating the theta

Using Menson weapons and mutant powers will do more damage than ordinary weapons.
Verified by: this cheat is unverified Submitted by: iReaperX on October 13, 2008

Die White!

At the check point Enter the Leaper(where all the leapers are sent to kill you in"Internal Changes")you can kill White at the top of the lift.1:Take lift up.2on`t move3:Take out pistol.4:Aim.5:Bang!ByeBye White!
Verified by: dubbya sucks Submitted by: Halojunkie on August 20, 2005

Grey shields

To reduce grey shields faster, use parasites and melee enemies to get back mutagen.
Verified by: this cheat is unverified Submitted by: iReaperX on October 13, 2008

Headshots

Well you may or may not know but you can kill mutants with just one shot!Your Pistol,Sniper Rifle,and Shotgun come`n`handy for this.So remember kids,the head is special!
Verified by: killer33634 Submitted by: Halojunkie on August 18, 2005

How to unlock hard mode

Complete the campaign on normal and you should get hard mode
Verified by: this cheat is unverified Submitted by: Mr T The Big on October 13, 2008

Monster Vision in game Scenes

Before an in game scene once you have mutated, go into mutant form and activate the Scene to see it in Mutant vision.
Verified by: this cheat is unverified Submitted by: YuGiOhFm2002 on May 07, 2005

Practice Makes Perfect!

If you wanna be good at something,headshots for example just practice.Once I discovered headshots are a 1-hit kills(not on bosses).I had a hard time,but now I can practically do it with my eyes closed.So Practice Makes Perfect!
Verified by: this cheat is unverified Submitted by: Halojunkie on August 23, 2005

Save Ammo!

Save your Ammo!It`s valuble,don`t waste it!If an enemy come`s close hit`em(I mean wack)conserve ammo!
There are a few bad reasons:1:If you want to survive you have to be a mutant.2:After you run outta mutegen you just have a gun or 2 to wack with.3:It makes the game harder.So heed my words!Save Ammo!
Verified by: this cheat is unverified Submitted by: Halojunkie on August 19, 2005

Secret Tapes

Scan all the data bank items in one level to unlock a tape on that level.
Verified by: this cheat is unverified Submitted by: iReaperX on October 13, 2008

Shotgun

When you get the shotgun, press R2 to fire twice as many shots at the one time.
Verified by: this cheat is unverified Submitted by: iReaperX on October 13, 2008

Smashing!+He Teleports!

When you friend(I think his name is Jack)gets his head torn off,after you kill the mutant look at his head.You can hit it when you do it will disappear,so it will look like you smashed it.+Before you kill the MP(right before you get your first SMP)just follow close behing,so close your like breathing down his neck.You`ll see him teleport instead of crouching and jumping.
Verified by: dubbya sucks Submitted by: Halojunkie on August 17, 2005

The Crane Controls.

I`m new to this game but anyway,at the part where you activate the crane controls(Not long after your
1st Spider encounterafter you defend "Crispy"when the timer appears...you get the point)Someone will say quick activate the crane controls or...something else like that do it quick.Before more Alien/Mutant/Monster things come.
Verified by: this cheat is unverified Submitted by: Halojunkie on August 16, 2005

Unlock "Gray" (Alien) Multiplayer Avatars

Complete the Campaign on Hard Difficulty.
Verified by: this cheat is unverified Submitted by: YuGiOhFm2002 on May 07, 2005

Unlock Hard Difficulty

Complete the Campaign on Normal Difficulty.
Verified by: dubbya sucks Submitted by: YuGiOhFm2002 on May 07, 2005

Upgrading The Alien Grenade

In the stage Life or Death, there is a small key on a dead soldier in one of the lifts where Cole starts the stage. Grab it to open the small lockers in the stage. One of the small lockers in the first power conduit pit has a databank item that upgrades the alien grenade (it now homes in on enemies).
Verified by: this cheat is unverified Submitted by: anonymous on January 24, 2006

Your Allies Don`t Matter,But You Do!

I read this off a FAQ/guide/walkthrough (you get the point) your allies are invincible... Crispy, Anthony, and Jack anyway along with HAZMAT team Delta so if you want a garanteed survival hide behind your friends and act like a coward! NOTE: Side effects can be Drowsiness, Diarea, MISSING ALOT OF ACTION and if online teammembers may hate you for it! Believe me it helped me get passed a hard level. Happy Hiding!
Verified by: dubbya sucks Submitted by: Halojunkie on August 18, 2005

Easter eggs

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Interesting Scans

When you get your scanner, scan your self and your allies to get some funny responses.
Verified by: this cheat is unverified Submitted by: iReaperX on September 17, 2008
(0.0968/d/web8)