Here is the full list of all 27 The Cave achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Saw the darkness in all our hearts.
Collector of forgotten dreams.
Everyone reached the bottom.
Saw the good in everyone.
Got everyone out of The Cave without dying once.
Shared in the blame for the Scientist's act of mass murder.
Slipped, where wet.
Peered into everyone's fate.
Broke bridges.
Pantomimed an ancient hieroglyph.
The scale reveals a baleful figure.
Where did the King go anyway?
Remembered it's wrong to steal.
Served as an accessory to the Time Traveler's murder of her enemy's ancestor.
Made all three characters smell like a dinosaur at once.
Came ever-so-close to recovering the Sarcophagus.
3 die by the Miner's hand.
Enabled the Hillbilly to burn down the Carnival.
Saw a postcard stolen from the Gift Shop.
Sacrificed oneself for ultimate flavor.
Reached the bottom of The Cave.
Food-based destruction.
Played some dubious role in the Monk's murder of his Master.
Recorded and played back the elevator music from the Zoo food court.
Stood by and watched as the Twins murdered their parents.
Watched Mummy and Daddy's furniture get broken all to bits.
Helped the Knight obtain Excalibur.