Yesterday I went bowling and I found a Raiden II cab, but it was an unusual version of the game:
-player 1 ship was blue instead of red
-player 2 ship was yellow insteas of blue
-straight laser shot was yellow instead of blue
-wide scattered shot was light blue instead of orange
-enemy bullets were light blue instead of orange
-the rendered ship in the intro was yellow
-other particulars that I remember being red/orange were blue as well (not sure which though)
-purple shot remained purple
I don't think it simply was a busted color chip, colors were nice and blended very well, and there were too many variations in the various blue/light blue/yellow/orange undertones.
And I'm fairly sure it wasn't a bootleg either, titlescreen was properly copyrighted Seibu Kaihatsu (plain official Seibu Kaihatsu too, no fancy Metrotainment/Fabtek licenses).
Did anyone ever see this besides me? (BTW I live in Italy)