Here is the full list of all 27 The Cave achievements worth 400 gamerscore. It takes around 12-15 hours to unlock all of the achievements on Xbox 360.
Played some dubious role in the Monk's murder of his Master.
Got the bridge inside the temple to collapse.
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.
Reached the bottom of The Cave.
Served as an accessory to the Time Traveler's murder of her enemy's ancestor.
Enabled the Hillbilly to burn down the Carnival.
Got the Weight Guess scale to read 666.
Helped the Knight obtain Excalibur.
Nobody died.
Stole.
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.
Where did the King go anyway?
3 die by the Miner's hand.
Pantomimed an ancient hieroglyph.
Everyone is gross.
Captured crusty melodies.
Slipped, where wet.
Food-based destruction.
Peered into everyone's fate.
Murdered millions.