Mortal Kombat (1992), a gory fighting game with huge splashes of blood and graphically violent fatality moves, was heavily censored by Nintendo. Because the Genesis version allowed for an uncensored version via cheat code, it outsold the censored Super NES version by a ratio of nearly three to one. U.S. Senators Herb Kohl and Joe Lieberman convened a Congressional hearing on December 9, 1993, to investigate the marketing of violent video games to children. Though Nintendo took the high ground with moderate success, the hearings led to the creation of the Interactive Digital Software Association and the Entertainment Software Rating Board and the inclusion of ratings on all video games. With these ratings in place, Nintendo decided its censorship policies were no longer needed. 32-bit era and beyond While other companies were moving on to 32-bit systems, Rare and Nintendo proved that the Super NES was still a strong contender in the market. In November 1994, Rare released Donkey Kong Country, a platform game featuring 3D models and textures pre-rendered on Silicon Graphics workstations. With its detailed graphics, fluid animation, and high-quality music, Donkey Kong Country rivals the aesthetic quality of games that were being released on newer 32-bit CD-based consoles. In the last 45 days of 1994, 6.1 million copies were sold, making it the fastest-selling video game in history to that date. This game conveyed that early 32-bit systems had little to offer over the Super NES, and proved the market for the more advanced consoles of the near future. According to TRSTS reports, two of the top five best-selling games in the U.S. for December 1996 are Super NES games. In October 1997, Nintendo released a redesigned model of the Super NES (the SNS-101 model referred to as "New-Style Super NES") in North America for , with some units including the pack-in game Super Mario World 2: Yoshi's Island. Like the earlier New-Style NES (model NES-101), this is slimmer and lighter than its predecessor, but it lacks S-Video and RGB output, and it is among the last major Super NES-related releases in the region. A similarly redesigned Super Famicom Jr. was released in Japan at around the same time. The redesign stayed out of Europe. Nintendo ceased production of the Super NES in North America in 1999, about two years after releasing Kirby's Dream Land 3 (its final first-party game in the US) on November 27, 1997,