|Sonic the Hedgehog||10|
|Clear the Sonic story.|
Simply complete Sonic the Hedgehog's Adventure Mode. He has 10 Action Stages and 7 Bosses which are all pretty easy to get through. You must also go on to defeat Egg Viper. After you land your final homing attack on him, Egg Viper will begin to fly around and he will try and dive at you. Make sure you dodge him or else he will take you out and then you will have to face him all over again. This will unlock after the credits.
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