Weapon Cheat
     During gameplay press ~ key to open the console then type:

give x

where x is

Cheat code:             Effect:
weapon_obrez            shotgun
weapon_mauzer           pistol
weapon_spanner          wrench
weapon_nailgun          nailgun
weapon_rifle            rifle
weapon_machinegun       Sub Machine Gun
weapon_bottle           Molotov Cocktail
weapon_rifle_sniper     Sniper rifle
weapon_thunder          Electro Gun
weapon_grenade          grenade
weapon_thunder_fire     flame thrower
weapon_maxim            Heavy Machine Gun
ammo_mauzer             pistol ammo
ammo_obrez              shotgun ammo
ammo_nailgun            nailgun ammo
ammo_rifle              rifle & sniper rifle ammo
ammo_ppsh               Sub Machine Gun ammo
ammo_thunder            electrogun and flame thrower ammo
ammo_maxim              Heavy Machine Gun ammo
item_medikit_small      small medikit
item_medikit_large      large medikit