Here is the full list of all 12 Interpol: The Trail of Dr. Chaos achievements worth 200 gamerscore.
Earned Elite Agent Rank in any Mission
Completed every Mission without using any Hints
Completed Mission 11 and captured Dr. Chaos
Completed Mission 9 and captured The Artiste
Completed Mission 6 and captured The Hammer
Completed Mission 3 and captured Mister Smith
Completed a City Location in less than 30 seconds
Found all 9 Bonus Items in one Mission
Completed one Mission without using any Hints
Completed one Mission
Found all 8 Items in a City Location in the Single Player or Co-Op Mission
Find 3 items within 5 seconds