Development of Sonic CD started by Sega's Sonic Team as a game to launch on the Sega CD platform, aiming to showcase the add-on's capabilities.
Sonic CD was first released in Japan and Europe for the Sega CD add-on, introducing new time travel mechanics and animated cutscenes.
The game was released in North America on the Sega CD, expanding the Sonic franchise and promoting the Sega CD hardware.
The original soundtrack for Sonic CD was composed by Naofumi Hataya and Masafumi Ogata, notable for its unique music style and memorable themes.
Sonic CD was re-released as a digital download, introducing the game to a new generation and increasing its availability beyond Sega CD hardware.
A remastered version of Sonic CD was released with enhanced graphics, widescreen support, and additional features on multiple modern platforms.
Sonic arrives at the mysterious Little Planet after receiving a distress call from Amy Rose.
Sonic learns about the powerful Time Stones hidden on Little Planet, which can alter the fate of the planet and its future.
Using portals, Sonic travels to the past versions of each zone to stop Dr. Robotnik's forces from corrupting the zones' futures.
Sonic destroys the evil robots in the past versions of zones to free the Time Stones and restore the futures to their peaceful state.
Sonic confronts his robotic doppelganger Metal Sonic, created by Dr. Robotnik to capture the Time Stones and defeat Sonic.
Sonic faces off against Metal Sonic in a climactic battle to prevent Robotnik's domination of Little Planet.
With Metal Sonic defeated and Time Stones reclaimed, Sonic restores peace and normal chronology to Little Planet.
