Dreamcast facts.

[retrolinkx]

Night's into Dreams was originally going to have a sequel for the Dreamcast, it was discussed, and was going to use a "motion controller" to play the game, but it was never put into practice

As seen below, the 3 pictures on the right show this controller.



GunValkyrie (a planned Dreamcast game) was meant to be played with the Dreamcast Controller and the Light Gun at the same time.

Source (To be honest, it may not be great source, but googling it comes up with relevant results)

The High Resolution Patch for Half Life/Opposing Force/Blue Shift was originally built for the Dreamcast, for it's exclusive Side Story Blue Shift (which in itself was ported to the PC). As Half Life, along with Blue Shift never came out for the Dreamcast, it was then ported to PC with the High Res patch.

Source
Source 2 (2nd Paragraph)

The Dreamcast's code name was Katana.

Sega made a lot of unreleased hardware for the Dreamcast including, a
Dreamcast DVD Player (which was an rumoured empty shell), A Zip Drive,
A Swatch Access?, and a really interesting A VMU MP3 player.

Also, a small Sega fact, Sega mean "Wank" or "To Masturbate" in Italian. Which was a big reason to why it was popular in Italy, and is rumoured to be a reason for the "Harder it gets" adverts.