Most Sega Codename Consoles were named after celestial bodies.

Project Mercury (also know as Sega Game Gear) was SEGA's first handheld to compete with Game Boy.

Project Venus (also know as Sega Nomad) was a handheld version of Sega Genesis.

Project Mars (also know as Sega 32X) was a add-on for Sega Genesis.

Project Jupiter was a 32-Bit Cartridge Base Standalone Console and it was also going to feature a CD Add-on like Sega Genesis and Sega CD. This early idea was scraped and SEGA moved on creating a standalone CD Base Console which is Sega Saturn due to CDs are cheaper and has more storage then Cartridges.

Project Saturn (also know as Sega Saturn) was a 5th Generation Console to compete with PlayStation and Nintendo 64.

Project Neptune was Sega 32X and Sega Genesis all-in-one Console. This Combo Console was never released.

Project Pluto was a second model of Sega Saturn with a NetLink Internet Modem accessory built in. Only two Prototypes was existed.

The only 2 planets that was not used by SEGA was Earth and Uranus.


Project Titan (also know as STV "Sega Titan Video") was an Arcade Board of Sega Saturn that used Cartridges instead of CDs. The STV was only used in Japan.

Project Janus (also know as Sega Picture Magic) was designed for Developers to edit pre-loaded pictures supplied on a smart media card.