Watch Act 2 of Sonic Mania's Green Hill Zone in action - Polygon

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Sonic and Tails in Green Hill Zone by SOLIDCAL on DeviantArt

SONIC MANIA: Green Hill Zone, Act 2 Gameplay — Polygon @ E3 2017

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The Spriters Resource - Full Sheet View - Sonic the Hedgehog (Prototype) - Green Hill Zone Act. 2