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Before now, SEGA has remained very careful about what levels they are adding into Sonic Generations – a 20th Anniversary game compilation to take older Sonic levels, remaster them and make them available as both a side-scrolling platforming game similar to that of the older Sonic the Hedgehog games – and the newer 3D platforming style of recent sonic games. New levels include Seaside Hill from Sonic Heroes and Rooftop Run from Sonic Unleashed.
