Cheats for secret missions that will open up many different possibilities for you and help you complete the game in a lightweight version.
Secret missions:
01 Cpt. Devin Ross - Kill 50 enemies with melee
02 Lt. Abigail Black - Kill 50 enemies using the Ghost Bullet
03 Sgt. Frank Delgado - Get 50 Headshots
04 Sgt. Wilhelmina "Billie" Church - Complete "Al Khali" on Hard Difficulty
05 Cpt. Xavier Jones - Complete "Man Down" on Hard Difficulty
06 cpl. Simone Cole - Complete "The Tomb" on Hard Difficulty
07Fr. Paul Rawlings - Get 100 Headshots
08 Agent Muriel Green - Complete The Den of Souls on Hard
09 Arnold Leech - Complete "Al Khali" on easy or normal. level
10 Deceased Devin Ross - Complete "Still With You" on Hard Difficulty
11 Cultist - Kill 100 enemies with melee
12 Exlposive Cultist Disintegrate 50 enemies
15 Corpses Behemoth - Complete "River of Blood" on Hard difficulty
17 Psychic Commander - Complete "World War 2" on either easy or normal
19 Flamethrower Disintegrate 100 enemies
20 Grenadier - Kill 100 enemies with the Ghost Bullet
21 Sir Richard de Gray - Complete "Out of the Frying Pan" on Hard
22 Brother William of Auxere - Complete Motley Crew on Hard
23 Warrior Crusader - Complete "Sewers" on Hard Difficulty
24 Crossbowman Crusader Complete Tortured Souls on Hard
25 Child Crusader Complete Crusades on Easy or Normal
26 Bishop Malthus St. Claire - Complete Crusades on Easy or Normal. level
27 Centurion Textius Longinus - Complete Decadence on Hard
28 Governor Cassus Vicus Complete "Rome" on Easy or Normal
29 Legionary - Complete "The Low Road" on Hard Difficulty
30 Blind Behemoth - Complete "Morituri te salutant" on Hard
31 Gladiator - Complete "Temple of Pain" on Hard difficulty
32 Antadurunnu - Complete "The God Seal" on Hard Difficulty
33 Enlil Complete "Spiritual Guide" on Hard difficulty
34 Inanna - Complete "Skin" on Hard Difficulty
35 Ki Complete "Flesh" on Hard Difficulty
36 Ninlil - Complete "Skin" on Hard Difficulty
37 Nanna - Complete "Blood" on Hard Difficulty
38 Utu - Complete "Blood" on Hard Difficulty
39 Sumerian Puppet - Complete "Flesh" on Hard Difficulty
40 Pyxis Prima Complete Sumeria on Easy or Normal
42 The Jericho Team - Complete "Rivers of Blood" on Hard difficulty
43 Operation: Godseal - Complete "Exorcism" on Hard Difficulty
Game page: Clive Barker's Jericho.