Here is the full list of all 30 Assassin's Creed Liberation HD achievements worth 400 gamerscore.
Collect all the pocket watches.
Achieve 100% Synchronization in all Sequences.
Block 10 shots or firing lines with a human shield.
Pickpocket 5000 écu.
Perform 10 predator moves using the Whip.
Kill all Citizen E and experience the true ending.
Complete the game (fake ending)
Complete every Business Rivals mission.
Buy the maximum number of ships (8).
Complete Sequence 8.
Complete all persona-specific side missions.
Complete every Ship Crew mission.
Complete Sequence 6.
Collect all diary pages, alligator eggs, Mayan statuettes, and mushrooms.
Kill an enemy from a tree, with the blowpipe, while using eagle vision.
Kill 25 enemies with the Parasol Gun.
Kill 5 guards in 15 seconds using only the Sugarcane Machete (without using the Chain Kill).
Use berserk poison to force an enemy to kill 5 enemies.
Collect every persona-specific collectible.
Complete every Bayou Fever mission.
Complete every Free Slaves mission.
Survive 10 animal encounters.
Synchronize all viewpoints.
Complete Sequence 4.
Buy every Dressing Chamber.
Complete Sequence 2.
Kill an enemy with a poison dart.
Tree Run for 10 branches without touching the ground.
Complete Sequence 1.
Buy your 1st Dressing Chamber.