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From The Developer: Sonic Unleashed is built on a powerful new “Hedgehog Engine”, which introduces seamless 3D to classic 2D camera transitions, whilst delivering a rich and expansive world with multiple paths to choose from. Under development for three years, the Hedgehog Engine produces a visually rich next generation look and feel with elements of classic Sonic gameplay mechanics. The Hedgehog engine will help re-define the gameplay experience for Sonic fans and newcomers to the franchise alike. More »