To unlock the Collector trophy in Assassin's Creed Liberation Remastered, you will need to collect every diary page, alligator egg, Mayan statuette and mushroom.
You can find their locations on the maps below (credit to
Raccoon28200 for the solution on the PS3 version of the game):
Alligator Eggs (12):Mushrooms (10): (you must start the side mission "Bayou Fever")
Diary Pages (30):Mayan Statuettes (10 ): (2 statuettes are found in main mission)