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what is the difference between all the sonic games

01-11-2014, 04:03 PM
#1
Joined: Jul 2013
Posts: 61
what is the difference between all the sonic games

I went to look for a sonic game and noticed there are episodes 1 through 3 plus 2 episode 4s and CD . What is the difference between those all ? should I start with episode 1 or CD?