Here is the full list of all 13 Silent Footsteps achievements.
Find the pasta.
Listen to the stereo.
Check the fridge.
The map reveals where you are.
Find the jerry can.
Find the Pi-sees stone.
Find the battery.
Create the snow cube.
Read the horoscope.
Find the strange fish.
Find the dirty sock.
Find the tea bag.
He's hiding in the credits...