Cheat mode:
Select “Options” at the title screen, then select “Cheats”. Enter one of the following case-sensitive codes to activate the corresponding cheat function.

Scepter and Mini-Rockets
Enter “10E6CUSTOMER” as a case sensitive code to unlock the Scepter and Mini-Rockets. Note: The second character in the code is the number zero, and the tenth character in the code is a capital letter “O”.

Vulcan and flamethrower:
enter 5FINGERDISCOUNT as a case-sensitive code.