Board Thread:General Discussion/@comment-4383275-20150414221305/@comment-477304-20150622164939

I guess the game did and didn't happen, although the events of the game were erased, it appears as though some characters remember it in some fashion. Sonic went to the Festival of the Sun, for no clear reason and after seeing him, Elise said something about a familiarity in the wind. Additionally, Blaze mentions Crisis City when talked to in Sonic Generations.

My opinion is that the Time Eater pulled Crisis City from an alternate timeline. From my very, very basic understanding of the multiverse theory, every decision we make creates a branching timeline and a alternate reality. Using the multiverse theory, Crisis City would still exist as an alternate reality which was sucked into the White Space, possibly by accident. Same applies for the bad future of Stardust Speedway. I actually made a blog about why the bad future of Stardust Speedway shouldn't be considered canon.