Enter "mountandew" for unlimited fuel.
In the Moscow Level, go to the SW portion of level. There will be a lot with bulldozers and garbage piles. Destroy them all until you find the super gun. You'll be glad you did!

type in thebigboys at the password screen for unlimited ammo, lives, missles, armour and fuel

enter the following passwords after inputting the desired level code.

midnightoil - infinite ammo,fuel and armour
angrylocal - soldiers and hortages crowd round chopper
quaker - enemies don't fire at you


Passcodes:

WORSTCASE - Level 1
GRANDTHEFT - Level 2
GROZNEY - Level 3
CHERNOBYL - Level 4
CIVILWAR - Level 5
Typing in NOSFERATU starts you at the previous level but with seven lives instead of three. Type ELVISLIVES for unlimited lives