And it has been an invaluable source of information for Chao breeders worldwide. The Chao Island website has been around for ages. If you’re looking for a one-size-fits-all improvement for your favorite 3D Sonic game, Modern SA2 is the way to go. Back when I first played SA2, I’d have killed to be able to go through the stages as multiple characters. Sonic Adventure 2: The New Challengers.