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.
Played some dubious role in the Monk's murder of his Master.
Broke bridges.
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.
Where did the King go anyway?
Helped the Knight obtain Excalibur.
Saw a postcard stolen from the Gift Shop.
Sacrificed oneself for ultimate flavor.
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.
Served as an accessory to the Time Traveler's murder of her enemy's ancestor.
Enabled the Hillbilly to burn down the Carnival.
Got everyone out of The Cave without dying once.
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.
The scale reveals a baleful figure.
Pantomimed an ancient hieroglyph.
Made all three characters smell like a dinosaur at once.
Slipped, where wet.
Food-based destruction.
Peered into everyone's fate.
Came ever-so-close to recovering the Sarcophagus.