LogFAQs > #976727298

I think part of it though is that there's no other good Sonic game that plays like SA2, while with Sunshine you could be playing multiple games in the franchise that are just flat out better with the same core game feel.

I think Unleashed running stages and Frontiers are far superior to SA2's gameplay, but the games barely resemble eachother so you don't feel like you could just be playing something else. I would never play Sunshine if I could be playing Galaxy, Odyssey, or 64, regardless of whether Sunshine is good on it's own or not.