Here is the full list of all 8 Child of the Wind achievements.
You've visited every dock in Zone 1.
You've visited every dock in Zone 2.
You've visited every dock in Zone 3.
You've mastered every level in Zone 1.
You've mastered every level in Zone 2.
You've mastered every level in Zone 3.
You've completed every Zone currently in the game!
You've mastered every Zone currently in the Game!