Codes for ALL of the Patches:
ineedabiggun = Super Chain Gun powerup once per level
holokurtisfun = Dummy powerup once per level
nastyshotthanks = Homing sniper grenade once per level
tornadoaway = Twister powerup once per level
486ok = Allow 486 machines to run

For Un-patched final North American executable:
makemefull = Health once per level
masterblaster = Gatt powerup once per level
twistandshout = Twister powerup once per level
biggrenade = Homing sniper grenade once per level
486willbeslow = Allow 486 machines to run

For European Version:
healme = Health once per level
ineedabiggun = Gatt powerup once per level
tornadoaway = Twister powerup once per level
holokurtisfun = Dummy powerup once per level
486okbyme = Allow 486 machines to run