Killzone Cheats and Tips

Unlock All Levels and Characters:
Enter the name Shooterman with a capitalised 'S' at the start of a new game when you are told to enter a name.

Unlock Luger:
Beat the 2nd mission in the story mode.
Unlock Rico:
Beat the 3rd mission in the story mode.

Unlock Hakha:
Beat the 4th mission in the story mode.

On any menu hold L1 and enter the following codes
Big Head Enemies:
Circle, Square, X, Circle, Circle

One Shot Kill Ability:
Circle, Triangle, Circle, Triangle, X
Unlock All Movies:
Circle, Square, Triangle, Circle, Square

There are any cheat code in Killzone ps2?
* Yes. There lot of cheat. But there are 5 cheat!
Cheat here:
In the menu screen, hold L1 and enter these codes:
Enemies have Big Heads: CIRCLE, SQUARE, X, CIRCLE, CIRCLE
Unlock all movies: CIRCLE, SQUARE, TRIANGLE, CIRCLE, SQUARE
More Powerful weapons: CIRCLE, TRIANGLE, CIRCLE, TRIANGLE, X
More Powerful weapons (Alt): SQUARE, TRIANGLE, CIRCLE, TRIANGLE, CROSS
Enemies have big enemy
*They have Big head if you can see him where he hide in place and free shot his head your headshot will count rise!
More Powerful weapons
* Your Armor are Big Number.
More Powerful weapones (Alt)
* This is a called is One hit shot. When you shot enemy they ..

Enter the word 'shooterman' as your campaign name and you will unlock all levels - including HOPE!

One hit kills - At any menu screen, hold L1 and press circle,triangle,circle,triangle,X.
All fmv sequences - at any menu screen, hold L1 and press circle,square,triangle,circle,square.

Start a new game, and as your username, put "SHOOTERMAN". You should then automatically have all Stages and Characters.

Enter "Shooterman" as your profile and have "s" in capitals and presto you have all levels and people

Here is the resson why you should use Rico for he has the best gun out of the four players that you can use for the game.
Plus his gun has 800 bullets and 3 grenades.

The best is easily Assault as the ISA on the Beachead level. Get the sniper rifle and get on top of the wall and it's great fun.

On battlefeilds it is fast to got to the last level and get the sniper and get somewere high and kill people

Go on the beach level and climbed up the tower near the beach make sure you have a sniper rifle when you get to the top the is a wall with a hole missing it probably got blown up or something anyway duck down and you can see every direction the enemy is coming from but make sure you look behind you every five mins or they will shoot you from behind

If your playing on the battle field remember this, always reload after every fire fight, the sniper rifle kills in one shot(you don't need a head shot) and the mini gun comes with a grenade lancher(the grenades are a bit like rockets, always on thier own and are grey)
You might already knows this but some people dont.

Okay, most ppl with gameshark already knows this, but for ppl who just got it, activate infinite ammo and no reload time, and when you start as ISA, if you hit secondary fire butto, BAM, auto fire grenades that never run out, also watch that you don't hit yourself with explosions. Also works with gun that fires missles as secondary
Soul_eater, OUT

Start a new game and enterSHOOTERMAN as your name and they all will be unlocked

At the main menu hold L1 and press, O, square, triangle, O, square

In the battlefield mode,pull out a grenade,cook it while walking up to your enemy(best to do it from behind),get a little tiny bit close and stand there.wait ford it to explode.(really good in a crowded area).

On the 1st level. Helghast Assault after you run away from the tank and you are in that little bunker fighting off the Helghasts if you look behind you. Right at the back of the bunker you will see a Helghast Mask with a tube on it but no Helghast.