article here: http://www.pcpro.co.uk/features/361591/the-top-ten-retro-gaming-secrets
3. Seems like less of a "secret." It seems kind of obvious that until the 90s all the major consoles had light guns. And while Nintendo stopped bothering with guns for a while after the collosal failure of the superscope, other consoles continued to have guns in each generation. They just never gained the level of recognition that the NES zapper had because they weren't pack-in items.