Full Name: SEGA Rating System
Platforms: Late Sega Mega Drive, Sega Game Gear, Sega Mega-CD games, the entire Japanese Sega 32X library, most Sega Saturn games and many PC games.
Founded: Circa 1994
Discontinued: 2000 - replaced by the CERO rating system.
The SEGA Rating system was an in-house game content rating system for Sega games in Japan.