Killzone 3 Cheats And Trophies

Ready For Battle – Complete weapons training (Bronze): Completed weapons training in Prologue.
In Your Face – First Brutal Melee (Bronze): Performed first Brutal Melee move.
No Witnesses – Destroy all dropships on the Highway (Bronze): Destroy all dropships on the Highway.
Mopping Up – Kill 40 Helghast foot soldiers (Bronze): Killed 40 or more Helghast foot soldiers on the beach.
Sawn Off – Destroy all chasing APC's (Bronze): Destroyed all chasing SawBlade APC's in the Senlin Beach section.
Smoking Wrecks – Destroy all Tanks on Senlin Beach (Bronze): Destroyed all the Helghast Tanks in the Senlin Beach section.
Turn The Tables – Melee Kill a Capture Trooper (Bronze): Killed a Capture Trooper using melee.
Spiky Personality – Kill a Helghast using a Burster (Bronze): Killed a Helghast by shooting a Burster plant.
Minigunned – Destroy all targets (Bronze): Destroyed everything while using the Minigun on the Intruder.
Quick Exit – Escape the Oil Rig quickly (Bronze): Got off the 2nd rig within 2 minutes..
Shattered – Destroy all glass in the Labs (Bronze): Destroy all glass panes in the Stahl Arms South laboratories.
Pinpoint – Kill the Heavy with an StA-14 (Bronze): Killed the HEavy using the StA-14 rifle.
Evening The Odds – Kill 500 Helghast (Bronze): Kill 500 Helghast.
Cagefighter – Kill 10 Helghast using Brutal Melee (Bronze): Killed 10 Helaghast using Brutal Melee.
Frag Out – Kill 3 Helghast with 1 Frag Grenade (Bronze): Killed 3 Helghast using 1 fragmentation grenade.
One Each – Kill 3 Helghast with Shotgun Pistol, no reloads (Bronze): Shot and killed 3 Helghast using the Shotgun Pistol without reloading or switching weapons.
Eagle Eye – Every Sniper Rifle bullet is a kill (Bronze): Shot and killed 6 Helghast using the Sniper Rifle without reloading or switching weapons.
Power Spike – Nail a Helghast to an exploding object (Bronze): Used the Boltgun to nail a Helghast to an exploding object.
Up Close & Personal – Brutal Melee another player (Bronze): Used the Brutal Melee move against another player.
Team Player – Play a match as part of a squad (Bronze): Joined and completed a match as part of a squad.
Medic! – Revive another player (Bronze): Revived a friendly player for the first time.
Handy Man – Repair an object (Bronze): Repaired an object for the first time.
Now You See Me – Kill using Cloak (Bronze): Killed another player while cloaked.
Spy Game – Kill using Disguise (Bronze): Killed another player while disguised.
Turf War – Capture a Tactical Spawn Point (Bronze): Captured a Tactical Spawn Point for the first time.
Now It's Personal – Kill 1000 Helghast (Silver): Killed 1,000 Helghast.
Fight To The Last – Kill 1500 Helghast (Silver): Killed 1,500 Helghast.
Close Quarters Killer – Kill 25 Helghast using Brutal Melee (Silver): Killed 25 Helghast using Brutal Melee.
Hand To Hand Master – Kill 50 Helghast using Brutal Melee (Silver): Killed 50 Helghast using Brutal Melee.
Victory – Complete Campaign on Elite (Gold): Completed every mission on Elite difficulty.
Grand Slam – Win a match in 3 multiplayer modes (Gold): Won a match in Operations, Warzone & Guerrilla Warfare modes.
Platinum (Platinum): Collect all Killzone 3 trophies.

Additionally, there are 20 secret trophies:

Time For A Dip – Reach the river (Bronze): Reached the Corinth River with the convoy.
Save The Intruders – Arc APCs destroyed (Bronze): Successfully assisted with defeating the Arc APCs.
Never There – Sneak past Helghast (Bronze): Sneaked past all Helghast in the Jungle without alerting any of them.
ISA TV – Establish communications (Bronze): Made contact with Earth.
Aerial Superiority – Kill 5 Helghast while in the air (Bronze): Killed 5 Helghast while airborne using the Jetpack.
Into The Lair – Reach the cable car (Bronze): Reached the cable car and gained access to Stahl Arms South.
Jail Break – Liberate Narville (Bronze): Liberated Narville from Stahl Arms South.
Go Down And Stay Down – Destroy the ATAC (Bronze): Defeated the ATAC outside the Stahl Arms facility.
Iced – Destroy all Ice-Saws and Dropships (Bronze): Destroyed all 4 Helghast Ice-Saws and all 6 Dropships.
You Drive – Drive the Mobile Factory (Bronze): Took over the controls of the Mobile Factory.
Bring It Down – Defeat the MAWLR (Bronze): Defeated the MAWLR defending the Space Elevator.
Completist – Destroy everything on the MAWLR (Bronze): Destroyed every destructible weapon on the MAWLR while on foot and on the Intruder.
Frazzle Dazzle – Kill 3 Helghast with one shot from the StA5X Arc Cannon (Bronze): Used the StA5X Arc Cannon to kill 3 Helghast with one shot.
Excessive Force – Kill a lone Helghast with the WASP secondary fire (Bronze): Used the secondary fire function of the WASP launcher to kill a single Helghast.
Spread The Love – Kill 5 Helghast at once using the WASP's secondary fire (Bronze): Killed 5 Helghast at once using the secondary fire mode of the WASP launcher.
Double Trouble – Reach the river in Co-op (Bronze): Made it to the Corinth River in Co-op mode.
Stranded Together – Reach the Extraction Point in Co-op (Bronze): Made it to the Extraction Point in Co-op mode.
Pilot's Wings – Mid-air kill (Bronze): Got a mid-air kill using the Jet Pack in any multiplayer mode.
Iron Man – Get a kill with the Exo (Bronze): Killed a player using the Exo in any multiplayer mode.
Let's Go Home – Destroy Stahl's Cruiser (Gold): Destroyed Stahl's Cruiser and left the planet on any difficulty.

The following trophies require the “Reclaimed Territory” bonus downloadable content:

Automata For The People – Automata destruction (Silver): Destroy an enemy Sentry Turret, Sentry Drone and Medi-Droid in the same round.
Blood Streak – Kill streak (Silver): Get a 5 kill streak in Blood Gracht.
Brutal Footsteps – Silent killing (Bronze): With the Silent Footsteps skill active, Brutal Melee an enemy player.
Death By Proxies – Proximity Mine kills (Silver): Using Proximity Mines, kill two enemies within one minute in Blodd Gracht.
Demolitionist – Destroy objectives (Silver): Demolish both buildings by winning Search & Destroy as ISA and Helghast in Salamun Market.
Little Big Weapons – Kill with secondary weapons (Silver): Get 15 kills using secondary weapons in a single match.
Tactical Mastery – Help capture Tactical Spawn Areas (Silver): Be playing at the moment your faction secures all four Tactical Spawn Areas simultaneously in Salamun Market.