Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Back At Ya (Bronze)	Get 50 Retaliation Medals.
Fallen Angel (Bronze)	Get 50 Afterlife Medals.
I'll Cover You (Bronze)	Get 50 Defender Medals.
Jack of All Trades (Bronze)	Get 15 Triple Threat Medals.
Kneel Before Z... (Bronze)	Get 5 Put-em Down Medals.
Not So Fast (Bronze)	Get 20 Shut'em Down Medals.
Rock a Rhyme (Silver)	Get 100 Tricky Medals.
Speedy (Bronze)	Get 10 First! Medals.
Under Siege (Bronze)	Finish Wave 10 in 1 Siege game.
You Can't Break Me (Bronze)	Complete all 3 co-op objective maps on Crushing.
You Run, I'll Shoot (Bronze)	Get 10 Protectorate Medals.