Here is the full list of all 35 Desecration of Wings achievements.
Reach the true ending.
Defeat all post-game optional bosses.
Find enough Contorted Stones to finish the altar.
Forge the ultimate heavy armor.
The abomination along the shore.
The evil within the depths of the forest...
The abomination within the tower.
A lost soul near where it all began.
The abomination of the labyrinth.
Truly a worthy opponent.
A horror lurking in Mondeville...
The evil within a prison of ice...
Defeat the monster of the ice tower.
Reach the normal ending.
Survive the Dragon's Tower.
Play the greatest minigame of all time.
Defeat all missable optional bosses.
Have Felana prove her mastery of her profession.
Find all the treasure in the game.
Reach endgame with an average party level below 20.