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