With Sonic Generations coming upon us in time for the holidays, as well as 2011 being Sonic’s 20th anniversary, it’s a great time to take a look back at the franchise’s extensive history. A lot has changed in Sonic’s 20 years of breaking speed limits and smashing Badniks. The changes have been so drastic, you could even say that Classic Sonic and Modern Sonic are a part of two separate worlds. There may be some truth to that. While Modern Sonic’s world really leaves no mystery behind it, Classic Sonic has a few more skeletons in his closet: missing levels, unreleased games, and, most notably, missing and never-before-seen characters.
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