Sonic CD is a platform game developed by Sega for the Xbox 360. In this installment, Sonic ventures to Little Planet, a world where time converges, to confront his rival Dr. Eggman. With the Time Stones, Eggman seeks to dominate time itself. Players navigate through past, present, and future, defeating enemies and reclaiming the Time Stones to restore harmony to Little Planet.
Sonic travels to the distant shores of Never Lake for the once-a-year appearance of Little Planet - a mysterious world where past, present, and future collide through the power of the Time Stones that lie hidden within it.
Sonic arrives only to find the once beautiful world imprisoned beneath a twisted metallic shell. His arch-nemesis, Dr. Eggman, has come for the Time Stones and with them, will soon have the power to control time itself!
In order to put an end to Dr. Eggman’s nefarious schemes, Sonic must use the power of Little Planet to travel through time; breaking Dr. Eggman’s hold over the future by destroying his machines in the past and recovering the missing Time Stones!