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.
Pantomimed an ancient hieroglyph.
Peered into everyone's fate.
Remembered it's wrong to steal.
The scale reveals a baleful figure.
Where did the King go anyway?
Everyone reached the bottom.
Saw the darkness in all our hearts.
Shared in the blame for the Scientist's act of mass murder.
Slipped, where wet.
Watched Mummy and Daddy's furniture get broken all to bits.
Sacrificed oneself for ultimate flavor.
Food-based destruction.
Played some dubious role in the Monk's murder of his Master.
Broke bridges.
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.
Reached the bottom of The Cave.
Stood by and watched as the Twins murdered their parents.
Came ever-so-close to recovering the Sarcophagus.
Helped the Knight obtain Excalibur.
Saw a postcard stolen from the Gift Shop.