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