Here is the full list of all 11 Bloody Hell achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Finish the game on His day of rest.
Defeat the former ruler of all.
Defeat Satan.
Collect all 18 Chickens.
Unlock all Blood Vials.
Be halfway in finding all chickens.
Create a Satanic Star.
Defeat a former ally.
Defeat Maggy.
Defeat Pork Chop.
Go to Hell. Literally.