What Made Sonic Heroes So Great

It's time for the Sonic Heroes Analysis, what I'd consider the ending of Part 1 of the Sonic Retrospective. So far we have discussed how Sonic had risen in the 1990s with the classic games, fallen with the Saturn era, and made a great, next generation comeback with the Sonic Adventure era. So Heroes is most certainly NOT a bad game, nor the start of the Dark Age, it instead the next epic Sonic game to receive the in depth analysis treatment!