 This game is released in June 2001 to coincide with the 10th  anniversary of the Sonic series. In Japan, there were special cases  of SA2 for the 10th anniversary that had the game in a gold disk, a  CD featuring the soundtrack of the game, and a booklet of the  history of the Sonic series. However, the 10th Anniversary bash was  poorly timed due to SEGA ending the Dreamcast and pulling out of the  console business.