The Sega Genesis console was released on October 29, 1988 in Japan and on August 14, 1989 in the United States. In regions outside of the U.S. it was marketed as the Sega Mega Drive, and its release was meant to topple the dominance of Nintendo in the gaming market.
Sega began an intensive ad campaign to market the Genesis. As a direct competitor of Nintendo, the company used the slogan "Genesis does what Nintendon't." Some of the classic arcade games featured in Genesis were "Mortal Kombat", "Golden Axe" and "Ghouls N' Ghosts." The most popular game to debut on the Sega Genesis was "Sonic the Hedgehog," which quickly became the arch-rival of Nintendo's Mario.