Trophies:
Bronze trophies
Seasoned Squaddie – Complete any multiplayer level.
Bigger is Better – Purchase any weapon upgrade.
Version 2.0 – Purchase an item upgrade.
At Your Mercy – Kill a stunned alien with a Frag Grenade.
The Initiated – Complete the prologue on any difficulty level.
Bigger Isn’t Always Better? – Kill a sentry gun with the Blaster.
Networking – Complete any co-op assault map over PlayStation Network.
Exploding Fist – Kill 3 burster aliens with one melee attack.
Into the Kill Zone – Kill 20 aliens with one sentry gun.
Recon Unit – Complete any single player level with the waypoints turned off.
K.I.A. – Locate the bodies of Vance and Barnes.
Hard Up? – Sell any item.
Sunny Side Up? – Kill an alien egg using the melee attack.
Shattered – Smash 10 windows.
Grave Robber – Collect 50 items or weapons from human corpses.
Lost? – Access the map screen.
Silver trophies
Battle-hardened – Complete all single player levels 1-5.
Immobilised – Use a stun grenade to stun 10 aliens at the same time.
Frag-master – Use a Frag Grenade to kill 10 aliens at the same time.
The Informed – Collect all logs through out the game.
Survivor – Stay alive for 8 minutes or better on any of the Survivor mode single player levels.
Meat Grinder – Kill 250 aliens on any of the Survivor mode multi player levels.
Hidden Treasure – Find all ‘secret’ collectibles.
Tank – Take 200 damage without dying on ‘Determination’ single player mission.
Survivors – Achieve a time of 8 minutes or better on any multiplayer survivor map.
Light ’em up! – Kill 5 aliens with one shot of Project X.
Exterminator – Kill 1000 aliens in single player.
Idle Sentries – Finish any level with five Sentry guns in your inventory.
Systems Crash – Kill Mia.
Regicide – Destroy the alien queen.
Gold trophies
Elite Unit – Complete all single player levels 1-5 on elite difficulty.
More Speed, Less Haste – Complete ‘Vengeance’ single player level on Veteran mode in 17 minutes or less.
Can’t Get Enough – Complete the prologue, all single player, co-op assault and survivor maps.
Hardcore – Complete any single player level using only the Blaster and Grenades.
Platinum trophy
The Completionist – Earn all Bronze, Silver, and Gold trophies.