Sonic CD

Sonic the Hedgehog CD
Sonic the Hedgehog CD
	North American cover art
Developer(s)	Sega
Publisher(s)	Sega
Director(s)	Naoto Ohshima
Producer(s)	Minoru Kanari; Makoto Oshitani;
Programmer(s)	Matsuhide Mizoguchi
Artist(s)	Hiroyuki Kawaguchi; Kazuyuki Hoshino;
Composer(s)	Original release:; Naofumi Hataya; Masafumi Ogata; North America:; Spencer Nilsen; David Young; Mark "Sterling" Crew;
Series	Sonic the Hedgehog
Platform(s)	Sega CD, Windows, Android, PlayStation 3, Xbox 360, iOS, Apple TV
Release	September 23, 1993 Sega CD JP: September 23, 1993; WW: November 23, 1993; Windows JP: August 9, 1996; NA: September 26, 1996; EU: October 3, 1996; Android, PS3, Xbox 360 WW: December 14, 2011; iOS WW: December 15, 2011; Apple TV WW: March 31, 2016; ;
Genre(s)	Platform
Mode(s)	Single-player

Sonic the Hedgehog CD^[a], simply known as Sonic CD, is a 1993 platform game developed and published by Sega for the Sega CD. As Sonic the Hedgehog, the player attempts to protect an extraterrestrial body, Little Planet, from Doctor Robotnik. Like other Sonic games, Sonic runs through themed levels while collecting rings and defeating robots. Sonic CD introduces time travel as a game mechanic. By traveling through time, players can access different versions of stages, featuring alternative layouts, music, and graphics.

Sonic CD began as a port of the Sega Genesis game Sonic the Hedgehog (1991), but developed into a separate project. Led by Sonic's co-creator Naoto Ohshima, the developers sought to show off the technical capabilities of the Sega CD. Sonic CD features the debuts of the recurring Sonic characters Amy Rose and Metal Sonic, and includes animated cutscenes created by Studio Junio. Two soundtracks were composed: the original soundtrack featured in the Japanese and European versions was composed by Naofumi Hataya and Masafumi Ogata, while the one in the North American version was composed by Spencer Nilsen, David Young, and Mark Crew.

Sonic CD was released in late 1993. It received critical acclaim and is often called one of the best Sonic and platform games. Reviewers praised its size, music, and time travel feature, although some felt it did not fully use the Sega CD's capabilities. It sold over 1.5 million copies, making it the bestselling Sega CD game. Sonic CD was ported to Windows as part of the Sega PC label in 1996, and to the PlayStation 2 and GameCube as part of Sonic Gems Collection in 2005. A remake, developed by Christian Whitehead using the Retro Engine, was released for various platforms in 2011 and as part of the Sonic Origins compilation in 2022.
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