There are 10 Trophies in this DLC.

Bronze

You hear that? We're official…
Complete Assault on the 87th Precinct.

Above and beyond
Achieve Gold Rating in Assault on the 87th Precinct.

GAC in time for dinner
Achieve maximum CLEAR TIME BONUS in Assault on the 87th Precinct.

Contender
Get 350,000 points in a single play session of Riot Control.

Marking your territory
Upload a Riot Control score to the Scoreboard.

Jack Slate of all trades
Get 15 unique awards in one round in Riot Control.

Silver

Dedication to the cause
Get 5,000,000 points total over multiple play sessions of Riot Control.

Hot head
Score 500,000 points in Retribution Mode over multiple play sessions of Riot Control.

Retribution Master
Score 250,000 points from Retribution Bonus over multiple play sessions of Riot Control.

1 Secret

http://www.ps3trophies.org/news-532-DLC-Added--Dead-to-Rights--Retribution.html

aerobes said:

Will anybody actuallly be playing the DLC for this? Thankyou for the update Skibadee and I have have recently played and enjoyed this but DLC? No thanks …

might get it depends on price for me really.