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