| Extra | How to unlock
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|---|
| 01 Cpt. Devin Ross | Kill 50 enemies using melee attacks
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| 02 Lt. Abigail Black | Kill 50 enemies using Ghost Bullet
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| 03 Sgt. Frank Delgado | Pop 50 heads!
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| 04 Sgt. Wilhelmina "Billie" Church | Complete "Al Khali" on hard
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| 05 Cpt. Xavier Jones | Complete "Man Down" on hard
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| 06 Cpl. Simone Cole | Complete "The Tomb" on hard
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| 07 Fr. Paul Rawlings | Pop 100 heads!
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| 08 Agent Muriel Green | Complete "The Den of Souls" on hard
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| 09 Arnold Leech | Complete "Al Khali" on either easy or normal
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| 10 Deceased Devin Ross | Complete "Still With You" on hard
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| 11 Cultist | Kill 100 enemies using melee attacks
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| 12 Exlposive Cultist | Disintegrate 50 enemies!
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| 15 Corpses Behemoth | Complete "River of Blood" on hard
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| 17 Psychic Commander | Complete "World War 2" on either easy or normal
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| 19 Flamethrower | Disintegrate 100 enemies!
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| 20 Grenadier | Kill 100 enemies using Ghost Bullet
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| 21 Sir Richard de Gray | Complete "Out of the Frying Pan" on hard
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| 22 Brother William of Auxere | Complete "Motley Crew" on hard
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| 23 Warrior Crusader | Complete "Sewers" on hard
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| 24 Crossbowman Crusader | Complete "Tortured Souls" on hard
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| 25 Child Crusader | Complete "Crusades" on either easy or normal
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| 26 Bishop Malthus St. Claire | Complete "Crusades" on either easy or normal
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| 27 Centurion Textius Longinus | Complete "Decadence" on hard without being incapacitated
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| 28 Governor Cassus Vicus | Complete "Rome"on either easy or normal
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| 29 Legionary | Complete "The Low Road" on hard
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| 30 Blind Behemoth | Complete "Morituri te salutant" on hard without being incapacitated
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| 31 Gladiator | Complete "Temple of Pain" on hard
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| 32 Antadurunnu | Complete "The God Seal" on hard
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| 33 Enlil | Complete "Spiritual Guide" on hard
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| 34 Inanna | Complete "Skin" on hard
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| 35 Ki | Complete "Flesh" on hard
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| 36 Ninlil | Complete "Skin" on hard without being incapacitated
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| 37 Nanna | Complete "Blood" on hard
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| 38 Utu | Complete "Blood" on hard without being incapacitated
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| 39 Sumerian Puppet | Complete "Flesh" on hard without being incapacitated
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| 40 Pyxis Prima | Complete "Sumeria" on either easy or normal
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| 42 The Jericho Team | Complete "Rivers of Blood" on hard without being incapacitated
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| 43 Operation: Godseal | Complete "Exorcism" on hard
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