the strength of the consoles, and companies like Epyx, Electronic Arts, and LucasArts began devoting their attention to developing console games By 1989 the market for cartridge-based console games was more than $2 billion, while that for disk-based computer games was less than $300 million. 16-bit consoles NEC released its PC Engine in 1987 in Japan, rebranded as the TurboGrafx-16 in North America. While the CPU was still an 8-bit system, the TurboGrafx-16 used a 16-bit graphics adapter, and NEC chose to heavily rely on marketing the system as a "16 bit" system to differentiate from the 8-bit NES. This ploy led to the use of processor bit size as a key factor in marketing video game consoles over the next decade, a period known as the "bit wars". Sega released its next console, the Mega Drive in Japan in 1988, and rebranded as the Sega Genesis for its North American launch in 1989. Sega wanted to challenge the NES's dominance in the United States with the Genesis, and the initial campaign focused on the 16-bit power of the Genesis over the NES as well as a new line of sports games developed for the console. Failing to make a significant dent in NES' dominance, Sega hired Tom Kalinske to president of Sega of America to run a new campaign. Among Kalinske's changes was a significant price reduction in the console, and the bundling of Sega's newest game Sonic the Hedgehog, featuring Sega's newest mascot of the same name, with the console. Kalinske's changes gave Genesis the edge over the NES by 1991 and led off the start of a console war between Sega and Nintendo. Nintendo's 16-bit console, the Super Nintendo Entertainment System (SNES) struggled on its initial launch in the United States due to the strength of the Genesis. This console war between Sega and Nintendo lasted until 1994 when Sony Computer Entertainment disrupted both companies with the release of the PlayStation. Among other aspects of the console war between Sega and Nintendo, this period brought a revolution in sports video games. While these games had existed since the first arcade and console games, their limited graphics required gameplay to be highly simplified. When Sega of America first introduced the Genesis to the United States, it had gotten naming rights from high-profile people in the various sports, such as Pat Riley Basketball and Joe Montana Football, but the