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