Successfully complete the indicated task to unlock the corresponding bonus:
  1. Cpt. Devin Ross: Kill 50 enemies using melee attacks. 
  2. Lt. Abigail Black: Kill 50 enemies using Ghost Bullet. 
  3. Sgt. Frank Delgado: Pop 50 heads. 
  4. Sgt. Wilhelmina "Billie" Church: Successfully complete "Al Khali" on the 
  Hard difficulty setting. 
  5. Cpt. Xavier Jones: Successfully complete "Man Down" on the Hard difficulty 
  setting. 
  6. Cpl. Simone Cole: Successfully complete "The Tomb" on the Hard difficulty 
  setting. 
  7. Fr. Paul Rawlings: Pop 100 heads. 
  8. Agent Muriel Green: Successfully complete "The Den of Souls" on the Hard 
  difficulty setting. 
  9. Arnold Leech: Successfully complete "Al Khali" on the Easy or Normal 
  difficulty setting. 
  10. Deceased Devin Ross: Successfully complete "Still With You" on the Hard 
  difficulty setting. 
  11. Cultist: Kill 100 enemies using melee attacks. 
  12. Exlposive Cultist: Disintegrate 50 enemies. 
  15. Corpses Behemoth: Successfully complete "River of Blood" on the Hard 
  difficulty setting. 
  17. Psychic Commander: Successfully complete "World War 2" on the Easy or 
  Normal difficulty setting. 
  19. Flamethrower: Disintegrate 100 enemies. 
  20. Grenadier: Kill 100 enemies using Ghost Bullet. 
  21. Sir Richard de Gray: Successfully complete "Out of the Frying Pan" on the 
  Hard difficulty setting. 
  22. Brother William of Auxere: Successfully complete "Motley Crew" on the Hard 
  difficulty setting. 
  23. Warrior Crusader: Successfully complete "Sewers" on the Hard difficulty 
  setting. 
  24. Crossbowman Crusader: Successfully complete "Tortured Souls" on the Hard 
  difficulty setting. 
  25. Child Crusader: Successfully complete "Crusades" on the Easy or Normal 
  difficulty setting. 
  26. Bishop Malthus St. Claire: Successfully complete "Crusades" on the Easy or 
  Normal difficulty setting. 
  27. Centurion Textius Longinus: Successfully complete "Decadence" on the Hard 
  difficulty setting without being incapacitated. 
  28. Governor Cassus Vicus: Successfully complete "Rome" on the Easy or Normal 
  difficulty setting. 
  29. Legionary: Successfully complete "The Low Road" on the Hard difficulty 
  setting. 
  30. Blind Behemoth: Successfully complete "Morituri te salutant" on the Hard 
  difficulty setting without being incapacitated. 
  31. Gladiator: Successfully complete "Temple of Pain" on the Hard difficulty 
  setting. 
  32. Antadurunnu: Successfully complete "The God Seal" on the Hard difficulty 
  setting. 
  33. Enlil: Successfully complete "Spiritual Guide" on the Hard difficulty 
  setting. 
  34. Inanna: Successfully complete "Skin" on the Hard difficulty setting. 
  35. Ki: Successfully complete "Flesh" on the Hard difficulty setting. 
  36. Ninlil: Successfully complete "Skin" on the Hard difficulty setting 
  without being incapacitated. 
  37. Nanna: Successfully complete "Blood" on the Hard difficulty setting. 
  38. Utu: Successfully complete "Blood" on the Hard difficulty setting without 
  being incapacitated. 
  39. Sumerian Puppet: Successfully complete "Flesh" on the Hard difficulty 
  setting without being incapacitated. 
  40. Pyxis Prima: Successfully complete "Sumeria" on the Easy or Normal 
  difficulty setting. 
  42. The Jericho Team: Successfully complete "Rivers of Blood" on the Hard 
  difficulty setting without being incapacitated. 
  43. Operation: Godseal: Successfully complete "Exorcism" on the Hard 
  difficulty setting.