Here is the full list of all 10 The Unfinished Swan achievements.
Look at the sleeping King.
Finish the Garden chapter.
Finish the Unfinished Empire chapter.
Finish the Nighttime chapter.
Finish the King's Dream chapter.
Launch a blueprint box 15 meters high.
Launch a blueprint box 30 meters high.
Release all balloons.
Reveal every storybook page in the game.
Reach the Watchtower without throwing more than 3 balls.