Alter game files at your own risk and always make backups. You can enable the console by adding -console to the game's shortcut file (e.g. C:\Program Files\Nobilis\Death to Spies\Death to Spies.exe -console).
Press the ~ key (or the key above Tab) to bring up the console. Enter the following cheats for the desired effect:
Cheat "silence" - Enables silent movement
Cheat "camouflage" - Appear disguised from the enemy
Cheat "invisible" - Guards can't see you
Cheat "disable ai" - Disables AI
setv cl_superman 1 - God Mode
setv c_noammo 1 - Infinite ammo
OpenLevels - Access all levels
PL_SavePos - Save your game
PL_RestorePos - Load your game
L_CreateItem - Creates an item (list below) Example: L_CreateItem weapon.walter
weapon.Walter - Walter
weapon.Mp40 - MP40
weapon.K98 - K98
weapon.Luger - Luger
weapon.Gewehr - Gewehr
weapon.K98Sniper - K98 Sniper Rifle
weapon.DeLisle - DeLisle
weapon.StenSilencer - Sten Silencer
weapon.MosinSniper - Mosin Sniper
weapon.MosinSilencer - Mosin Silencer
weapon.MosinCamo - Mosin Camo
weapon.Svt - SVT
weapon.Mosin - Mosin
weapon.Ppsh - PPSH
weapon.TT - TT
weapon.SvtSniper - Svt. Sniper
weapon.Pps - PPS
weapon.NaganSilencer - Nagan Silencer
weapon.Nagan - Nagan
weapon.Sten - Sten
weapon.EnfieldSniper - Enfield Sniper Rifle
weapon.Enfield - Enfield
weapon.Colt - Colt
weapon.Thompson - Thompson
weapon.Garand - Garand
weapon.M1Carbine - M1 Carbine
weapon.M1903 - M1903
weapon.M1903Sniper - M1903 Sniper Rifle
weapon.GermanStick - Stick Grenade
weapon.Rgd33 - RGD33 Grenade
weapon.F1 - F1 Grenade
weapon.Smoke - Smoke Grenade
weapon.Dynamite - Dynamite
weapon.Pmk40 - PMK40
weapon.Pmd6 - PMD6
weapon.Knife - Knife
weapon.FiberWire - Fiber Wire
weapon.Chloroform - Chloroform
Equipment.Binocular - Binoculars
Equipment.Foto - Foto
Equipment.Wirecut - Wirecutters
Equipment.Lockpick - Lockpicks
Equipment.Custom - Custom
Equipment.Medikit - Medikit
Equipment.Wear:Player - Standard Gear
Equipment.Wear:GermanSoldier - Nazi Officer Gear
Equipment.Wear:GermanOfficer - Nazi Officer Gear II
Equipment.Wear:Summer - Summer Gear
Equipment.Wear:Soviet - Soviet Gear
Equipment.Wear:RasplataDed - Rasplata Gear
Equipment.Wear:Scientist - Scientist Gear
Equipment.Wear:AmericanOfficer - American Officer Gear
Equipment.Wear:Jacket - Jacket
Equipment.Wear:Suitman - Suit
Equipment.Wear:GermanYellow - German Yellow Outfit
Equipment.Wear:EmbassyMan - Embassy Outfit
Equipment.Wear:EmbassyManSoldier - Embassy Soldier Outfit
Equipment.Wear:SovietSoldier - Soviet Soldier Gear
Equipment.Wear:SovietOfficer - Soviet Officer Gear
Equipment.Wear:GermanWinterSoldier - Nazi Winter Gear
Equipment.Wear:GermanWinterSoldier2 - Nazi Winter Gear II
Equipment.Wear:GermanWinterOfficer - Nazi Officer Winter Gear
Equipment.Wear:PosilkaElder - Posilka Elder Gear
Equipment.Wear:Winter - Winter Gear
Equipment.Wear:EmbassyAgent_1 - Embassy Agent Gear
Equipment.Wear:EmbassyAgent_2 - Embassy Agent Gear II
Equipment.Wear:HotelGuard - Hotel Guard Gear
Equipment.Wear:GermanGrey - German Grey Gear
Equipment.Wear:GermanDoctor - German Doctor Gear
Equipment.Wear:HotelManager - Hotel Manager Gear
Equipment.Wear:HotelWaiter - Hotel Waiter Gear
Equipment.Wear:HotelMan01 - Hotel Patron Gear
Equipment.Wear:BritishCook - British Cook Gear
Equipment.Wear:BritishSoldier - British Soldier Gear
Equipment.Wear:GermanCook - Nazi Cook Gear
Equipment.Throw:Papers - Papers
Equipment.Throw:OutofOrder - Out of Order Sign
Equipment.Throw:Knife - Knife
Equipment.Throw:Krujka - Krujka
Equipment.Throw:VBottle - Vodka Bottle
Equipment.Throw:Krujka2 - Krujka II
Equipment.Throw:Grafin - Grafin
Equipment.Throw:Korchik - Korchik
Equipment.Throw:Lojka1 - Loljka
Equipment.Throw:Lojka2 - Loljka II
Equipment.Throw:Lojka3 - Loljka III
Equipment.Throw:Bakal - Bakal
Equipment.Throw:Tarelka - Tarelka
Equipment.Throw:Tarelka2 - Tarelka II
Equipment.Throw:Tarelka3 - Tarelka III
Equipment.Throw:Tarelka4 - Tarelka IV
Equipment.Throw:Lojka4 - Lojka IV
Equipment.Throw:Vilka - Vilka
Equipment.Throw:Tarelka5 - Tarelka V
Equipment.Throw:Tarelka6 - Tarelka VI
Equipment.Throw:Tarelka7 - Tarelka VII
Equipment.Throw:Stakan - Stakan
Equipment.Throw:Sovok - Sovok
Equipment.Throw:Molotok - Molotov Cocktail
Equipment.Throw:GKluch - Gkluch
Equipment.Throw:Otvertka - Otvertka