The Genesis, known as Mega Drive in most regions outside North America, is a 16-bit home video game console which was developed and sold by Sega. The system supports a library of more than 900 games and can also play Master System games with the optional Power Base Converter add-on installed. It was released on August 14th 1989 for $200.00, which would equate to $402.16 today.
August 14th, 1989 Source: consoledatabase.com
Originally received a limited launch on August 14, 1989, in New York City and Los Angeles, released in the rest of North America later that year.