http://www.netrover.com/~timt/cheats/g/ghostbustersii.html (Amiga Plus Extra No. 5/97, 05/1997)Hold down 'ALT', 'CTRL', 'S', and 'U' when the activision logo appears and press fire. You should have infinite lives (except on level 3). This also stops the cable from breaking on level one.