Type activate Hidden & Dangerous cheats press [~] to enter console and then enter one of the following codes to activate the corresponding cheat function:

giveitem - Spawn indicated item (see the list below)
happyammo 1 - Unlimited ammo (0 to turn it off)
heal 1 - Heal self
heal 4 - Heal entire team
kill - Suicide
anorexy - ?
hydroshock 0- Turn Off Your Team's Shots Kill Instantly
hydroshock 1 - Your Team's Shots Kill Instantly

Item list
arisaka - Arisaka Meiji 38
arisakaopt - Arisaka Meiji 38 w/scope
bar - BAR M1918
brengun - Bren Gun
colt - Colt 1911
delisle - De Lisle Commando Carbine
degtyarev - Degtyarev DP 1928
enfield - Enfield .38
knifesas - Fairbairn-Sykes Dagger
backpackger - German Backpack
knifeger - German Figting Knife
backpackgb1 - Great Britain Backpack Style 1
backpackgb2 - Great Britain Backpack Style 2
backpackgb3 - Great Britain Backpack Style 3
k98 - Karabiner 98K
k98opt - Karabiner 98K w/scope
lee - Lee-Enfield MK 4
leeopt - Lee-Enfield MK 4 w/scope
parabellum - Luger Parabellum P08
bazooka - M1 Bazooka
garand - M1 Garand
thompson - M1 Thompson (Tommy Gun)
mosin - Mosin-Nagant M1891/30
mp44 - MP 44 Assault Rifle
mp40 - MP-40 Submachine gun
panzerfaust - Panzerfaust 60
pps - PPS-1943 Submachine gun
spagin - PPSh-41G Spagin
backpackrus - Russian Backpack
springfield - Springfield
springfieldopt - Springfield w/scope
stengun - Sten Gun Mk. 2
stengunsil - Sten Gun Mk. 2 w/Silencer
grenadeger - Stielhangranate 39
taisho - Taisho 14
tokarev - Tokarev TT-33
grenade36 - Type 36 MK1 Grenade
grenade69 - Type 69 MK1 Grenade
grenadejap - Type 97 Grenade
zb26 - ZB26 Light Machine Gun