The The Rising Tide Add-on for FINAL FANTASY XVI has 13 achievements.
Find again what was lost.
Enter Mysidia.
Awaken the storm.
Restore the flow of time.
Tamed the tides.
Defeat Leviathan in "Final Fantasy" mode.
Land 300 Tidal attacks combined (excluding battles in the Hall of Virtue).
Strike three or more enemies with Tidal attacks while using unlimited ammunition following a Quick Refill.
Channel the heavens.
Acquire and master all Leviathan and Ultima abilities.
Complete 10 Mysidian quests.
Complete the Trial by Water.
Complete Kairos Gate.