Board Thread:General Discussion/@comment-26873653-20151212201934/@comment-679780-20151225114815

I can't grant citidation, but I read somewhere that the games consist of two worlds, Sonic's world and Earth that are connected somehow which Sonic and friends pass through regularly.

I can't remember where I read it, but I figure what they mean about Sonic's world to be taken figuratively. He still lives on Earth which is a different Earth to ours and we see "his world" from his perspective. If that makes any sense.