Sonic the Hedgehog CD

Once every year, the mysterious Little Planet appears over Never Lake. But this time, Sonic arrives to find the planetoid chained to a mountain and encased in a metallic shell! Dr. Eggman has seized control, using the power of the Time Stones to manipulate the past, present, and future.

Sonic must race through time to destroy Eggman's machines and secure a "Good Future" for every zone. However, the Blue Blur isn't alone—Eggman has unleashed his most lethal creation yet: Metal Sonic. Can you save Little Planet and rescue a new friend before time runs out?