This limited edition birthday item is a special package sold by
Sega in 2001 to mark the tenth anniversary of
Sonic the Hedgehog's adventures. The package was only available to those who preordered
Sonic Adventure 2 for the
Sega Dreamcast and included the
Sonic Adventure 2 game, a special golden
CD of
music from the
Sonic the Hedgehog series, a commemorative
Sonic coin, and a booklet detailing the history of
Sonic the Hedgehog. It was all packaged in a special blue box.
The gold CD contains game music from Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog 3, Sonic and Knuckles, Sonic CD, Sonic R, Sonic Adventure, and the final track is a medley of vocal songs from Sonic Adventure 2.
The package is long out of distribution and anyone hoping to find one should check out online auctions. The game itself, of course, is more commonly available.