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