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