Here is the full list of all 23 Puddle achievements.
Who's behind the scene??
Reach the end of the Nuclear power plant chapter.
Finish all levels.
Make sure your fire engine remains undamaged.
Reach the end of the Foundry chapter.
Never give up! Keep trying again and again!
Reach the end of the Rocket chapter.
Reach the end of the Sewers chapter.
Reach the end of the Human body chapter.
Reach the end of the Laboratory chapter.
Take the shortcut in the level Wastewater.
Reach the end of the Nursery chapter.
It's time for the crash test.
Reach the end of the Watercourse chapter.
Finish a level with exactly the right amount of liquid.
Welcome to Puddle game!
Earn 48 gold medals.
Push the bulb inside the droseras making sure not to drop any particles.
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.
Finish the Nova level by only turning in one direction.