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