Get shot a lot? Helghast just can't be killed and you don't know why? Then stick with IGN's unofficial Killzone strategy guide. From stealth action to heated firefights, read up the guide on who to expect and what to bring along to survive the killing fields of Vekta.

• Full list of all available weapons, plus their uses in primary and secondary modes.
• A cast dossier so you can familiarise yourself with your squadmates; learn who is the easiest to use in what stage.
• Deadly ambushes revealed before you get there, so can stop having to restart over and over again.
• Prim-O sniping spots in the single player campaign so you can get "one shot, one kill".

Start a new game and were it tells you to put a name enter Shooterman. The S must be capitalized.

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

Submitted by Robert
Alternate by akirasan69

Some weapons with a long reload animation can be reloaded faster if the cycle weapon button is pressed right after the reload button. This cuts the animation to the next weapon in the queue, reloading the previous weapon and bringing up the next (hopefully loaded) weapon. By running your weapons in an assembly-line manner, you can reload one weapon while bringing another to bear on the enemy.

When you die, right before you die, throw a grenade, your timing has to be right. You drop the grenade as you die and it will sit there on your body. Five seconds later, when your killer gets ammo from you, he blows up. A nifty trick to get back at the guy who shot you when they search you for ammo.

Grab a shot gun and press the first and secondary fire on it to shoot it 3 times at once, this is perfect for a close-quarter combat online but of course its not effective from far-medium range.

The moment you switch weapons, tap the sprint button (click R3 while pressing forward) and you'll bypass the weapon-ready animation.