Sonic the Hedgehog 4: Episode 1
Sonic the Hedgehog 4: Episode I HD - iPad title
The game does not only return to the original series in terms of story and title, but also in terms of gameplay. Sonic 4 is a classical 2D sidescroller like its predecessors and also features the same game mechanics as the old games. There are some new additions, for example the "Homing Attack" which locks on Sonic's jump on enemies, jumping pads or breakable items. One major difference are the graphics, as Sonic 4 uses polygons for the Sonic characters and prerendered graphics for everything else, so does not recreate the looks of its predecessors, unlike, for example, Mega Man 9.