Game console
From Sega Retro
A Game Console is an apparatus that is connected to a television in order to play video games. Game consoles first entered the market with the Magnavox Odyssey in 1972 and have since enjoyed phenomenal success worldwide. Consoles may also be portable, allowing games to be played away from home (see Portable Console for more information).
Sega first entered the console market in 1983 and continued in this market until becoming a third-party developer in 2001.
Consoles manufactured by Sega
Sega Game Gear(portable)
Sega Nomad(portable)
Sega Mega Jet(only on Japanese Airlines)
Add-ons
In addition to the above consoles, Sega also released a series of add-ons for the Mega Drive/Genesis:
The Visual Memory Unit, released for the Dreamcast, was a memory card that could function as a portable console through use of certain Dreamcast games.