While playing, hold [CTRL] + [SHIFT] + [O] + [E] and then press [H] to activate Developer mode. You can then press any of the following cheat keys.
1 - Give Next Rifle
2 - Give Next Handgun
5 - Give Gas Mask
6 - Give Explosives
7 - Intended Upgrade Attributes
8 - Add 1000 EXP
9 - Give Morphine
G - God Mode
N - Maximum Ammo for Current Weapon
M - Maximum Armor
X - Toggle Fly Mode
V - Toggle Visibility
Ace (30) - Complete campaign in Normal difficulty
Admiral (10) - Secure precious collectible in "Leave A Light On - Storage"
Assassin (50) - Kill 200 enemies silently during a campaign
Assault (10) - Complete mission "Le Boeuf"
Assertiveness (10) - Kill 50 enemies during a campaign
Attentiveness (10) - Secure 15 collectibles during a campaign
Bad Temper (30) - Kill 150 enemies during a campaign
Blast'Em (20) - Trigger 5 grenades during a campaign
Blitzkrieg (50) - Complete the campaign in less than 5 hours
Close Combat Expert (20) - You have killed all enemies silently in "The Lost - Valley"
Curiosity (30) - Find all letters during a campaign
Delivery Service (10) - Complete mission "The Third Man - Prison"
Demolition (10) - Complete mission "The Lost - Fuel Storage"
Detox (30) - Complete a mission without using morphine although you have some
Diplomat (10) - Secure precious collectible in "The Third Man - Prison"
Disciple (10) - Earn first skill point
Down-And-Dirty (10) - Complete mission "The Third Man - Sewers"
Eagle Eye (50) - Secure all collectibles during a campaign
Firebug (10) - Complete mission "Leave A Light On - Storage"
General (10) - Secure precious collectible in "Death Of The Butcher - Cathedral"
Gold Lover (10) - Secure precious collectible in "Death Of The Butcher - Crypt"
Golden Bullet (10) - Secure precious collectible in "Le Boeuf"
Gotta Light? (20) - Kill 10 enemies with the flare gun during a campaign
Grand Master (50) - Earn 15 skill points during a campaign
In The Lion's Den (10) - Complete mission "Leave A Light On - Docks"
Infiltration (10) - Complete mission "Death Of The Butcher - Cathedral"
Legend (50) - Complete campaign in Agent difficulty
Liberator (10) - Complete mission "Death Of The Butcher - Crypt"
Master (30) - Earn 10 skill points during a campaign
Master Of Shadows (10) - Complete mission "The Lost - Valley"
Ninja (30) - Complete a mission firing a gun only when killing silently
Phantom (30) - Complete a mission without getting identified
Phoenix (10) - Complete mission "Fade To Grey - Hospital"
Relentlessness (50) - Kill 300 enemies during a campaign
Rogue (10) - Kill 50 enemies silently during a campaign
Sharp Senses (30) - Secure 40 collectibles during a campaign
Slayer (30) - Kill 100 enemies silently during a campaign
Wine Connoisseur (20) - You have found the wine bottle in "The Lost - Fuel Storage"
Witness (10) - Complete mission "The Third Man - Ghetto"
