History of the Nintendo Entertainment System
In the late 80s, Nintendo's dominance was threatened by newer, technologically superior consoles. 1987, NEC and Hudson Soft released the PC Engine, and a year later, Sega released the 16 bit Mega Drive. Both were introduced in North America in 1989, where they were respectively marketed as the "TurboGrafx-16" and the "Genesis." Facing new competition from the PC Engine in Japan, and the Genesis in North America, Nintendo's market share began to erode. Nintendo responded in the form of the Super Famicom ("Super Nintendo Entertainment System" in North America and Europe), the Famicom's 16-bit successor, in 1990. Although Nintendo announced their intention to continue to support the Famicom alongside their newer console, the success of the newer offering began to draw even more gamers and developers from the original NES, whose decline accelerated. However, Nintendo did continue support of the NES for about three years after the September 1991 release of the Super NES, with the NES's final first-party games being "" and "Wario's Woods".
Sega CD
By the early 1990s, compact discs were making significant headway as a storage medium for music and video games. NEC had been the first to use compact disc technology in a video game console with their PC Engine CD-ROM² System add-on in October 1988 in Japan (launched in North America as the TurboGrafx-CD the following year), which sold 80,000 units in six months. That same year, Nintendo announced a partnership with Sony to develop its own CD-ROM peripheral for the Super NES. Commodore International released their CD-based CDTV multimedia system centered in early 1991, while long-in-waiting CD-i from Philips finally arrived towards the end of that year.