Sega is a multinational video game software and hardware development company, that is headquartered in Ōta, Tokyo, Japan. The company had success with both arcades and home consoles, but on , officially left the consumer console business and began concentrating on software development for multiple third-party platforms.
- Sega SG-1000: Available in limited markets
- Sega SG-1000 II: Updated version of the SG-1000, includes a keyboard
- Sega Mark III: Available in limited markets(Japan/Australia/New Zealand)
- Sega SC-3000: A computer version of the SG-1000
- Sega SC-3000H: An updated version with more RAM and keyboard (the original keyboard was of the low-end membrane type).
- Sega Master System: Essentially the same as the Mark III only with a different name and a few minor adjustments
- Sega Master System II: An update to the Master System with a new smaller redesigned frame, as well as inbuilt game "Alex the Kidd in Miracle World.
- Sega Mega Drive: Known as the Sega Genesis in North America due to another company owning the Mega Drive trademark in that region.
- Sega Mega-CD: Known simply as the Sega CD for the North American market, it allowed CD based games as well as Audio CDs to be played on the Mega Drive.
- Sega 32X: Hardware update to the Mega Drive allowing 32-bit based games to be played
- Sega Multi-Mega: a portable CD player with the functionalities of a Sega Mega Drive and Sega Mega CD. Following the Mega ... brands, its name was Multi-Mega in most of the world and Genesis CDX in North America.
- Sega TeraDrive: A 16-bit PC with an integrated Mega Drive. Came with a Software Development Kit to allow creation of Mega Drive games. The system was only released in Japan.
- Sega Neptune: A Sega Mega Drive/32X hybrid. It never passed the prototype stage. Only two empty cases are known to exist.
- Sega Saturn: Sega's other 32-bit console released before the 32X in Japan, but after the 32X in North America and Europe.
- Sega Dreamcast: First 128-bit (sixth generation) console, also Sega's last console.
- Sega Pico: an educational gaming system.
- Sega Advanced Pico Beena: Successor of the Sega Pico
- Amstrad Mega PC: Although not actually produced by Sega themselves, the Mega PC is Amstrad's version of the TeraDrive for European and Australian markets, thus includes electronics for Sega's Mega Drive console built-in.
- Game Gear: Sega’s 8-bit handheld
- Sega Mega Jet: A Mega Drive unit, originally only available on Japan Airlines flights
- Sega Nomad: Sega Mega Drive in a portable unit
- Sega VMU: Memory Card for Dreamcast, also able to download games
- Sega Vision