There is a debug mode/object debug in the Dreamcast version of Sonic Adventure. The list of objects that's used in the SADX Preview are the same. For example, here's a snippet from STG01.bin (can only be found when decompressing prs files): I guess if someone knew where to look, they could activate this in the Dreamcast version. I don't know if this is different from the list in the SADX Preview. Note: I copied this from the STG01.bin file from the E3 version. EDIT: Sonic Adventure 2 Preview/Trial/Final also have these inside their STG##.bin decompressed from their prs files. Here's a nice snippet from SA2 Preview: Taken from STG41.bin, SA2 Preview.