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