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