While on the intro screen type "SERIALINTERFACE", then while playing press 'F9' to top off Robocop's energy and 'F10' to skip to next level. Note: There might be a space between the two words.

Try this one as well, once loaded, press 'F3' to access the high-score table and type in "BAMBOOZULEM" followed by pressing the 'Help' key. You should have infinite energy. When you're in the shooting gallery, don't move the joystick and you'll have 1,186 targets.

Hold down the 'Right Shift' key and type "THE DITY MEN" (with spaces) another author gives it as "THE DIDDY MEN", and still another as "THE DIDY MEN". Now press the 'Esc' key to skip levels. It must be retyped at the start of each section.