http://www.youtube.com/watch?v=AGGm5TEyx54 For those who don't know about this screen (And I don't blame you if you don't), this intro was custom made for mature-rated games for the Saturn (and supposedly the Mega-CD as well) in the North American region to"warn" players about adult content. What I wan't to know is what other games used this intro. So far, the only games I know that use it are Duke Nukem 3D and Eternal Champions: Challenge From the Dark Side.
It's the name for the custom game rating by SoA, and (I could be wrong about this) the divison of SEGA that developed M and Adult Only games at the time. could also be a refrence to Jaws, but meh :P
I don't think there are more than two. Sega are big fans of self-regulation - they still slap little logos on games they deem too "violent" in Japan, despite the CERO rating system covering it