Here is the full list of all 22 Dreaming Sarah achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Shrink the eye.
Finish the game.
Find the watch.
Find the juice box.
Find the dead cat.
Find the heart-shaped key.
Find the pill.
Help the pianist.
Find the paint bucket.
Find the bus card.
Find the shell necklace.
Find the bullet.
Touch the moon bunny.
Find Blockhead.
Discover the ancient aliens.
Find the magnifying glass.
Find the ID card.
Find the glasses.
Find the compass.
Find the bag of seeds.
Find the hat.
Find the umbrella.