This is a 10th Anniversary bonus CD that came with the "Birthday Pack," a limited edition version of the Dreamcast game "Sonic Adventure 2" released by Sega Corporation to commemorate the 10th anniversary of Sonic's birth, for a limited two-day period. Please note that this is not the "Sonic Adventure 2" game software itself. The contents are as follows: ・10th Anniversary Gold Disc (a deluxe CD packed with Sonic series BGM and more) ・10th Anniversary Gold Medal (an original medal engraved with the 10th-anniversary mark) ・Sonic History Book (a deluxe book explaining the history of the series, including design transitions) There are minor scratches on the outer packaging, but no scratches are visible on the disc. Everything in the photos is included. It will be wrapped in cushioning material for shipping. *I have corrected the previous listing as there was an error.