Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Boom, Headshot! (Bronze)	Get 50 Head Cracker Medals.
Deathless (Bronze)	Complete a Co-op Adventure Map on Hard Difficulty without losing a single life.
Double Trouble (Bronze)	Get 50 Double Down Medals.
Fly on the Wall (Silver)	Get 3 Hang In There Medals while on Crushing Difficulty.
Gladiator (Silver)	Win 50 matches of TDM.
I'm on a Roll (Bronze)	Get the Unyielding Medal while on Hard Difficulty.
Long Gun Lover (Bronze)	Get 50 Commando Medals.
Looking for Loot (Bronze)	Get 50 Three Medals Pickup Medals.
Stealth Master (Bronze)	Get 50 Assassin Medals.
Triumvirate (Bronze)	Kill the three end bosses in Chapter 5 (Harry Flynn, Eddy Raja, Zoran Lazarevic) within 20 seconds of each other on Crushing.