Here is the full list of all 39 Little Noah: Scion of Paradise achievements.
Earn 59 badges in the adventurer's log.
Log 142 different accessories.
Obtain 100 blue crystals.
Obtain 100 green crystals.
Red Crystal
Max out your bond with 40 different Lilliputs.
Repair the airship 75 times.
Obtain 10 different Avatars.
Defeat 50 Rascals.
Defeat Greigh Little without taking any damage.
Complete 200 challenges.
Defeat Greigh without taking any damage.
Log 40 different Lilliputs.
Clear the game on HARD difficulty.
Defeat Greigh Little.
Defeat Greigh.
Defeat Fang (Ice).
Defeat a Fang without taking any damage.
Clear 25 monster lairs.
Buy 100 shop items.
Defeat 2,000 enemies.
Open 500 treasure boxes.
Defeat Fang (Wind).
Use 20 Ruin Keys.
Defeat Titan (Hammer).
Use a potion 30 times.
Activate Avatar Burst 30 times.
Max out a Lilliput's level for the first time.
Reach the depths of the ruins.
Achieve a 150 hit combo.
Defeat Titan (Glaive).
Defeat a Titan without taking any damage.
Reach the Winding Caverns.
Defeat Jack.
Switch Noah's Avatar for the first time.
Defeat Queen.
Defeat King.
Place a statue on the airship for the first time.
Begin exploring the ruins.