Here is the full list of all 23 Puddle achievements.
Reach the end of the Nursery chapter.
Push the bulb inside the droseras making sure not to drop any particles.
Finish a level with exactly the right amount of liquid.
Reach the end of the Watercourse chapter.
Take the shortcut in the level Wastewater.
Welcome to Puddle game!
Reach the end of the Laboratory chapter.
Reach the end of the Human body chapter.
Reach the end of the Sewers chapter.
Reach the end of the Rocket chapter.
Reach the end of the Foundry chapter.
Reach the end of the Nuclear power plant chapter.
Finish all levels.
Earn 48 gold medals.
Never give up! Keep trying again and again!
Who's behind the scene??
It's time for the crash test.
Finish a level after at least 10 nitroglycerine explosions.
Don't trigger any nausea during the Slightly acid level.
Keep you glass ball intact in the Tahiti level.
Keep all your liquid in the tank from the 2011 vintage level.
Make sure your fire engine remains undamaged.
Finish the Nova level by only turning in one direction.