Here is the full list of all 16 Vernal Edge achievements.
Beat the game
Beat the game on Vicious difficulty
Enter Unreality of your own accord
Find the hidden palette
Purchase every item from every shop
Parry 8 hits without taking damage
Acquire Treasure Sense
Acquire Pacifist's Curse
Win the fishing minigame
Win the baseball minigame
Tend to the lonely flower
Complete the Pyramid without using the shortcut
Discover Slime's Summit
Meet Chervil's new friend