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.
Saw the good in everyone.
Collector of forgotten dreams.
Got everyone out of The Cave without dying once.
Saw the darkness in all our hearts.
Slipped, where wet.
Peered into everyone's fate.
Everyone reached the bottom.
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.
The scale reveals a baleful figure.
Remembered it's wrong to steal.
Food-based destruction.
Recorded and played back the elevator music from the Zoo food court.
Pantomimed an ancient hieroglyph.
3 die by the Miner's hand.
Enabled the Hillbilly to burn down the Carnival.
Where did the King go anyway?
Sacrificed oneself for ultimate flavor.
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.
Saw a postcard stolen from the Gift Shop.
Reached the bottom of The Cave.
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.
Helped the Knight obtain Excalibur.