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