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.
Unlock all Blood Vials.
Collect all 18 Chickens.
Be halfway in finding all chickens.
Defeat the former ruler of all.
Create a Satanic Star.
Defeat Satan.
Defeat a former ally.
Defeat Maggy.
Defeat Pork Chop.
Go to Hell. Literally.