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