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.
Help the pianist.
Find the paint bucket.
Find the bullet.
Touch the moon bunny.
Find the bus card.
Find the shell necklace.
Find Blockhead.
Find the pill.
Find the juice box.
Find the dead cat.
Find the heart-shaped key.
Find the magnifying glass.
Discover the ancient aliens.
Find the ID card.
Find the glasses.
Find the compass.
Find the hat.
Find the bag of seeds.
Find the umbrella.