Sonic 1
Sonic 2
Sonic 3&K
Sonic CD
Sonic Colors
Sonic Generations
Sonic 4 Episode 1
Sonic 4 Episode 2
and whatever else you wanna include but I listed those because I'm interested in "old games vs new games that people don't think suck"
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http://www.youtube.com/watch?v=npHDxSvwCE0