Sonic CD is an adaptation of internationally renowned Sonic for Android tablets. The story tells about the little hedgehog, which is able to develop high speed. Before our hero important task – protection of the planet from crazy Dr. Eggman. The villain managed to construct a time machine, thus he was able to arrange a chaos in the future and in the past. Fortunately, sonic managed to get one of the machines that allowed him to travel in time, and therefore the hero has a chance to defeat his old enemy and bring peace back to his planet. Travel in time and space, destroying a time machine and rescuing civilians from enslavement.