Here is the full list of all 29 The Falconeer achievements.
Purchased all 5 falcon types from races
Completed the Epilogue
Completed the Oberon's Reach chapter
Destroyed 15 turrets in one mission
Bought all chants from the seachantresses
Discovered all the shrines and temples
Sunk 3 ships in one mission
Found all the fortified locations
Found all Imperial locations
Converted a fortified position for the Mancer Order
Converted a fortified position for the Pirates
Found all Mancer locations
Completed the Shard chapter
Filled all mutagen slots for your Falcon
Retured to the scene of the Nodbomb blast
Unlocked all permits in every campaign
Found both biochemists and the weapons trader
Completed the Cleftspire chapter
Found all 3 seachantresses
Clocked the fastest time on all 5 racecourses
Took down 10 air targets in one mission
Found all Civilian Free House locations
Completed the Dunkle chapter
Bought a new type of weapon
Converted a fortified position for the Imperium
Clocked fastest time on a racecourse
Took down 5 air targets in one mission
Completed the Prologue
Discovered a shrine or a temple