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