Here is the full list of all 11 Skyscrapers Puzzle: Airis tale achievements.
Complete all 4x4 campaign levels.
Play the tutorial.
Complete all 5x5 campaign levels.
Complete all 6x6 campaign levels.
Press that button.
All hail the king of Ithaca!
If you see this it's already too late.
Reach the bad ending.
Reach the true ending.
I'm not THAT type of game!
Unlock all the outfits.