"This is my gamecube preview disc that has 5 playable demo's, Sonic adventure being one of the playable games, All games are in early build before they were released to the public in their final builds, So kinda like beta versions of games, The disc has a small chip in it currently which stop's it from playing correctly, But i plan on getting the disc possibly fixed, And even if it can not be fixed, It is still a collectable in my eyes even if the damage takes away what it is worth, I will take good care of this disc, My cousin traded it to me for a copy of sonic mega collection i had on gamecube that i no longer wanted because i have sonic mega collection plus on xbox."