In a post on the Official PlayStation Blog, Simon Phillips Criterion Games designer made a confirmation that It’s open world set in the fictional Burnout Paradise City will soon support PS3’s upcoming trophy system after the future update Cagney which will hit on July 10.

As for the post made he did mention that the trophy support will be retroactive meaning that that the saves are locked into a single PSN ID with the progress that you have made in the game will be unlocked as the update is release.

Trophies, Timed Challenges for Burnout Paradise [PS Blog]