http://www.netrover.com/~timt/cheats/r/robocop.html (Amiga Plus Extra No. 5/97, 05/1997)Pause the game and type "BEST KEPT SECRET". The border should flash and you are now invincible.
Pause the game and hold down the SHIFT key. Type "ALEX MURPHY" and you can now recharge your energy by holding down the left mouse button.