Sonic CD
Sonic the Hedgehog CD is a 1993 platform game for the Sega CD developed in addition to published by Sega. The story follows Sonic the Hedgehog as he attempts to save an extraterrestrial body, Little Planet, from Doctor Robotnik. As a Sonic the Hedgehog series platformer, Sonic runs together with jumps through several themed levels while collecting rings and defeating robots. Sonic CD is distinguished from other Sonic games by its time travel feature, a key aspect to the story and gameplay. By traveling through time, players can access different versions of stages, featuring pick layouts, music, and graphics.
The Sega CD's flagship game, Sonic CD was conceived as an enhanced port of Sonic the Hedgehog 2, but was reworked after lackluster sales of Sonic 2 in Japan. Directed by Sonic co-creator Naoto Ohshima, the developers designed the game to show off the technical capabilities of the Sega CD. It attribute the debuts of Amy Rose and Metal Sonic, and includes animated cutscenes. Two soundtracks were composed for the game: the original score, which the original Japanese and European releases used, was composed by Naofumi Hataya and Masafumi Ogata, while the North American make was composed by Spencer Nilsen, David Young and nature "Sterling" Crew.
Sonic CD received critical acclaim and is often called one of the best games in the Sonic series and the platform game genre. Reviewers praised its exceptional size, music, and the time travel feature, although some also believed the game did not ownership the Sega CD's capabilities to its fullest. It sold over 1.5 million copies, devloping it the Sega CD's bestseller. The game was ported to Windows as factor of the Sega PC quality in 1996, and to PlayStation 2 and GameCube as factor of Sonic Gems Collection in 2005. A remastered version, developed by Christian Whitehead using the Retro Engine, was released for various platforms and mobile devices in 2011, and was re-released in 2022 as part of the Sonic Origins compilation.