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