Original URL: http://www.psxextreme.com/ps3-cheat-print/599.html
All Zombies Must Die!

This isn't the easiest Platinum to nab but if you love killing zombies, it's doable. Credit to GameFAQs user Guard Master.

Trophies

There are 7 Bronze Trophies, 4 Silver Trophies, and 1 Gold Trophy.

Trophy Description
A Legion of Zombies (Silver) Kill 500 zombies in one level
Back with the X (Bronze) Witness Rachel joining the group
Big Brain Brian (Bronze) Witness Brain joining the group
Can't touch this (Silver) Complete a Base quest without taking any damage
Fists of Fury (Bronze) Kill a mutant with your fists
Getting to know each other (Silver) Complete all character quests
Kill a zombie (Bronze) Kill a zombie
Master Craftsman (Bronze) Fully upgrade a weapon with any status effect
The Collector (Silver) Complete 'Dev Card Hunt!'
Thought this was a Zombie Game? (Bronze) Witness Luxo joining the group
Touch Base (Gold) Complete 'Return to the Military Base'
Watch this! (Bronze) Use your first Smart Bomb