Here is the full list of all 14 Retro City Rampage: DX trophies - there are 11 bronze, 2 silver and 1 gold.
Match all cards in a single round of the casino game at the Spades To Steal Casino
Hit 4 people with a single shotgun blast
Reach a 99X chain multiplier
Kill 256 civilians within a single life
Hit 25 pedestrians in a row with your car without stopping
Play Free Roaming Mode as one of the guest stars
Knock someone off their bike to ricochet another off theirs
Collect all of the time machine parts
Dethrone GLC's high score
Drive 65,536 pixels
Get "sick" on "milk"
Blow up 8 vehicles in 8 seconds
Kill four green sewer dwellers
Raise your threat level by committing a crime that attracts police attention