See below.
Destroy all enemy units to progress through snow, jungle, canyon lands and lab levels... featuring over 30 weapons.
Type in the cheats menu (Main -> Players -> Cheats):
Unlocks Bow and arrow - John Rambo
Unlocks Chain gun - Old Faithful
Unlocks Sniper rifle - Its a Jackal
Unlocks Double shotgun - This is my boomstick
Unlocks Guided launcher - Follow the leader
Unlocks Drunken launcher - Moonshine
Unlocks GooGun - Gloop
Unlocks SparkPlug - 9 Volt
Unlocks LaserRifle - Alpha
Unlocks Auto laser rifle - Beta
Unlocks LaserShotgun - Gamma
Unlocks Anytime - I dont have time to bleed
Unlocks Airstrike - Call in artillery
Unlocks All Levels - You are the moon master
Unlocks A-Bomb Launcher - Missile launch detected
Unlocks Soundwaave - Bass in your face
Unlocks Canyon Lands - Aint no mountain high enough
Unlocks Underground Lab - Who rides the wrecking ball
Cute message - iopred
Programmer message - DayDream
Unlocks Flak Cannon - Shrapnel
Unlocks Black Hole Generator - Wash away the rain
Unlocks Amazon Jungle - Ive got jungle fever
Unlocks Bladerang - Australians all let us rejoice