I was very curious about all the console codenames and so started doing some research. This information is culled from my bad memory, GamesRader, NowGamer, IGN, our very own wiki pages, and the internet at large. Please help with accuracy! I'm sure something is incorrect or missing. I didn't include any codenames that became the system name, such as DS. Sega is where most of the confusion seems to be at, so someone who really knows that stuff should speak up!
According to a not insignificant number of websites, Atari's codenames are all well-endowed women who were working at the office at the time. See how far we've come? Stella is the lone outlier, and was instead named after a bicycle.
- Mercury - Sega Game Gear
- Mark V - Sega Genesis/Mega Drive
- Jupiter - Sega Saturn
- Venus - Sega Nomad
- Mars - Sega 32X
- Neptune - 32X/Mega Drive combo unit (unreleased)
- White Belt (Katana, Guppy), Black Belt (Shark, Dural) - Dreamcast
Planets. Nothing more to say here, except what's already been said: maybe Sega shouldn't have broken naming conventions for the Dreamcast. Just to clear that one up, White Belt and Black Belt where two versions of the Dreamcast, the latter built by an American IBM team, the other in Japan. White Belt became the DC we know today. Both versions had codenames so I included them all. Katana is the most famous one, for obvious reasons (samurai are cool).
- Dot Matrix Game - Game Boy
- Project Reality, Ultra 64 - Nintendo 64
- Atlantis - Game Boy Advance
- N2000, Dolphin - GameCube
- Nitro - Nintendo DS
- Revolution - Wii
- Project Cafe - Wii U
One interesting thing about Nintendo's codenames is they use an abbreviated version in their SKUs. GameCube games start with DOL, DS games with NTR and Wii games with RVR.
- PS-X - PlayStation
- Arc - PlayStation Move
- NGP (Next Generation Portable) - PlayStation Vita
- Orbis - PlayStation 4?