There are 12 Trophies that can be earned in this title.

Bronze

Finder's Keepers
Find all Items in a city location

Quick on the Draw
Find 3 items within 5 seconds

Not Impossible
Complete one Mission

The First Hint's Free
Complete one Mission without using any Hints

Wham, Bam
Complete a City Location in less than 30 seconds

You Always Remember Your First
Complete Mission 3 and capture Mister Smith

Back for Seconds
Complete Mission 6 and capture The Hammer

Third Time's the Charm
Complete Mission 9 and capture The Artiste

Silver

Bonus Plan
Find all Bonus Items in one Mission

Star Performer
Earn Elite Agent Rank in any Mission

Fourth Down
Complete Mission 11 and capture Dr.Chaos

Gold

Just Say "No"
Complete every non bonus Mission without using any Hints in single mode

http://www.ps3trophies.com/forums/trophy-news/35149-interpol-trail-dr-chaos-trophy-list.html