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.
Got everyone out of The Cave without dying once.
Peered into everyone's fate.
The scale reveals a baleful figure.
Saw the good in everyone.
Collector of forgotten dreams.
Made all three characters smell like a dinosaur at once.
Pantomimed an ancient hieroglyph.
Where did the King go anyway?
Sacrificed oneself for ultimate flavor.
Everyone reached the bottom.
Saw the darkness in all our hearts.
Remembered it's wrong to steal.
Shared in the blame for the Scientist's act of mass murder.
Slipped, where wet.
Saw a postcard stolen from the Gift Shop.
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.
Came ever-so-close to recovering the Sarcophagus.
Enabled the Hillbilly to burn down the Carnival.
Reached the bottom of The Cave.
Food-based destruction.
Watched Mummy and Daddy's furniture get broken all to bits.
Stood by and watched as the Twins murdered their parents.
Served as an accessory to the Time Traveler's murder of her enemy's ancestor.
3 die by the Miner's hand.
Helped the Knight obtain Excalibur.