Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Bite your finger (Silver)	Found the secret reptile.
Extreme Hoarder (Bronze)	Picked up 50 weapons in Scavenger mode.
Handyman (Bronze)	Unlocked all xbow parts.
Home made javelin (Bronze)	Destroyed an enemy vehicle using the xbow.
Pocket full of death (Silver)	Without dying, got a kill with xbow, primary weapon, and hand grenade.