Here is the full list of all 14 Atlantis: Pearls of the Deep achievements.
Collect 25 stars by completing level goals
Collect 50 stars by completing level goals
Collect 100 stars by completing level goals
Collect 150 stars by completing level goals
Collect 200 stars by completing level goals
Collect 250 stars by completing level goals
Collect 300 stars by completing level goals
Collect 350 stars by completing level goals
Collect 360 stars by completing level goals
Complete 10 levels in the Zen mode
Complete 50 levels in the Zen mode
Complete 200 levels in the Zen mode
Complete 500 levels in the Zen mode
Complete 1000 levels in the Zen mode