Here is the full list of all 39 Hitman: Absolution HD trophies - there are 28 bronze, 5 silver, 5 gold and 1 platinum.
Complete Hitman: Absolution HD on any professional difficulty
Assassinate Travis
Collect all evidence
Assassinate Blake Dexter
Complete 100 challenges
Assassinate Layla
Acquire suit & gloves
Approach the church
Gain access to the jail
47 precision headshots using a sniper rifle
Eliminate the Saints
Defeat Sanchez with your bare hands
Assassinate facility leaders
Exit the mines
Leave Lenny in the desert
Pacify Lenny the Limp
Acquire the Silverballers
Complete 50 challenges
Approach the bartender
Assassinate Wade
Assassinate Wade's men
Enter the train in the train station
Achieve the rating: Silent Assassin
Execute a point shooting with 3 kills
Achieve a lethal throw kill
Contain a situation gone bad
Locate room 899
Achieve your first accident kill
Remain undetected in a whole checkpoint
Subdue a person
Unlock a technique
Assassinate the King of Chinatown
Escape attention from enemies
Hide a body
Blend in successfully
Complete 10 challenges
Assassinate Diana Burnwood
Collect all trophies
Collect all play styles