North American cover art
|Distributor(s)||SoftKey (PC retail)|
|Series||Sonic the Hedgehog|
Sonic CD[a] is a side-scrolling platform video game in the Sonic the Hedgehog series developed by Sonic Team and published by Sega for the Sega CD. The story follows Sonic the Hedgehog as he attempts to save an extraterrestrial body, Little Planet, from Doctor Robotnik, while making rounds with his robotic doppelgänger Metal Sonic, who has kidnapped Amy Rose. Gameplay is similar to previous games in the Sonic the Hedgehog series: players guide Sonic through several levels, collecting rings as a form of health and defeating robots along the way. Sonic CD is distinguished by its time travel mechanic, a key aspect to the story and gameplay. By traveling through time, players can access different versions of stages featuring alternate layouts, music, and graphics based on the time period.
Development of Sonic CD began after the completion of the original Sonic the Hedgehog (1991), with development being overseen by Naoto Ohshima. The game was conceived as an enhanced port of Sonic the Hedgehog 2 that would take advantage of the Sega CD's abilities, but split into a separate project after lower-than-expected sales of Sonic 2 in Japan. It was released worldwide throughout late 1993. Two soundtracks were written for the game, with the North American release having a completely different one composed by members of Sega Technical Institute.
Sonic CD received praise for its graphics, gameplay, and audio, with some critics calling it one of the best games in the series. It was also commercial successful, being the best-selling game released for the Sega CD. Since its initial release, Sonic CD has been ported to other platforms several times, first to Windows as part of the Sega PC brand in 1996, and to PlayStation 2 and GameCube as part of Sonic Gems Collection in 2005. Enhanced ports of the game, developed using the Retro Engine, were also released for various platforms and mobile devices in the early 2010s.
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Sonic CD is a platform game that shares the same basic gameplay elements defined by earlier Sonic games, in which players control Sonic the Hedgehog as he ventures to defeat his nemesis Doctor Robotnik. However, new to the game is a time travel system; by hitting posts labeled "past" or "future" and maintaining his speed for several seconds, Sonic can move between four different variants of each zone ("past", "present", "good future" and "bad future"), each of which features different graphics, music, and layouts of platforms, enemies, and obstacles. By default, traveling to the future will take Sonic to a "bad future", an industrialized dystopia with scenery themed around neglect and decay. Players are encouraged to convert each zone's timeline to a "good future": a utopic technogaian scenario in which technology and nature are fused into a sustainable, colorful environment, and in which there are no enemy robots. Players attain good futures by traveling to the past — primitive, vegetation-filled versions of each stage with few enemy robots and muted, natural colors — and destroying a hidden "robot transporter".
The game is split into seven levels referred to as "rounds", each with its own unique appearance and enemies. Each round is split into three "zones"; the third zone is always set in the future, where players must defeat Robotnik in a boss fight. Players guide Sonic, who runs around levels at high speeds and collects rings, which can protect him if he is hit by an enemy or obstacle, as well as items such as shields, invincibility, and speed shoes. Sonic also has the ability to perform "spin dash" and "peel-out" maneuvers, which increase his speed. Players start the game with three lives, lost when Sonic collides with an enemy, obstacle, or takes damage without possessing rings; additional lives are earned by collecting rings and power-ups. If the player loses all their lives, the game is over. The game also features an instant game over in the form of an Easter egg: if the game is left alone, unpaused for three minutes, Sonic will shout "I'm outta here!" and leap off the screen.
By finishing a level with more than 50 rings, the player can access "special stages", in which they must destroy UFOs floating around a three-dimensional plane within a time limit. Time is reduced if the player runs through water, though a blue UFO which appears when time is running out grants extra time if destroyed. If the player destroys all the purple UFOs before the time runs out, they earn a Time Stone. A good ending is achieved by collecting all seven Time Stones, or by achieving a "good future" in every act. The player automatically achieves a "good future" if they have collected all the Time Stones.
In the 2011 version, players can also play as Miles "Tails" Prower after clearing the game once. Tails has the same abilities as he does in Sonic the Hedgehog 3: as with Sonic, Tails can use the Spin Attack and Spin Dash, and has the added ability to fly and swim, but is unable to use the Super Peel Out and cannot be used to earn achievements. Players also have the option to use the Spin Dash physics from Sonic the Hedgehog 2, allowing them to charge and more quickly use the Spin Dash.
Sonic the Hedgehog journeys to Never Lake, where an extraterrestrial body, Little Planet, appears on the last month of every year. He finds the planet tethered to a mountain by a chain and partially mechanized. Sonic ventures into the planet, followed by the besotted Amy Rose, his self-proclaimed girlfriend.[b]
Sonic discovers his nemesis, mad scientist Doctor Robotnik, has led his robot army to Little Planet and transformed it into a giant fortress. Robotnik seeks the Time Stones, seven jewels capable of altering the passage of time. He dispatches his top robotic enforcer, Metal Sonic, who kidnaps Amy. Sonic is tasked with collecting the Time Stones and saving Amy, and clashes with Robotnik as he explores the planet. Sonic goes back in time and restores Little Planet by destroying Robotnik's robot transporters.
After chasing Robotnik from his weapons factory, Sonic ventures to the city of Stardust Speedway. He clashes with Metal Sonic again as they both try to escape while Robotnik destroys the city. Metal Sonic is severely damaged, and Sonic frees Amy. At Robotnik's base, Sonic defeats Robotnik, causing his base to explode and breaking Little Planet free of its tether.
In the game's "good" ending, Little Planet is returned to its rightful state and leaves Never Lake. In the game's "bad" ending, while Little Planet leaves Never Lake, Robotnik succeeds and the planet is left under his rule, in a decaying, mechanized state. However, time resets, thus causing Little Planet to reappear at the lake. Sonic returns, determined to save the planet.
The 1991 release of Sonic the Hedgehog, the first game in the Sonic series, was a major commercial success, and positioned Sega as Nintendo's main rival in the console market. However, lead programmer Yuji Naka had grown dissatisfied with Sega's rigid corporate policies and moved to the United States to work with Sega Technical Institute, along with several members of Sonic Team, to develop Sonic the Hedgehog 2. At the same time, Sega was planning to release the Sega CD, an add-on for the Sega Genesis, and wanted a Sonic game that would show off the console's features. Thus, a separate team in Japan led by Sonic co-creator Naoto Ohshima began developing an enhanced port of Sonic 2 for the Sega CD codenamed Super Sonic. It was to feature additional levels, a fully orchestrated soundtrack, sprite-scaling effects, and animated cutscenes. However, after lower-than-expected sales of Sonic 2 in Japan, Super Sonic was split into a separate game and retitled CD Sonic the Hedgehog and then Sonic CD.
During development, the concept of time travel was embraced; Ohshima later cited Back to the Future as an influence in an interview with Gamasutra. The team did not receive as much pressure from Sega as the team developing Sonic 2 had, which Ohshima attributed to Sonic CD not being "a numbered sequel". The game marked the debuts of Amy Rose and Metal Sonic, designed by artist Kazuyuki Hoshino. The game also features animated cutscenes, which were produced by Toei Animation. Fans searching through the game's files discovered an unused stage; Yuji Naka would later state in an interview that the stage was likely cut due to time constraints. The game took two years to develop and was released in Japan on September 23, 1993.
The enhanced 2011 Sonic CD port was developed from scratch by using the Retro Engine created by independent developer and fan Christian "the Taxman" Whitehead. Whitehead produced a proof-of-concept video of his fangame running on iOS in 2009, showing the Palmtree Panic stage and additional enhancements such as widescreen graphics and spin dash physics from Sonic the Hedgehog 2. Whitehead also designed two original stages, but they were excluded as Sega wanted to keep the game faithful to the original release. The remake was not released on the Wii as it exceeded the maximum downloadable size that WiiWare allowed.
There are two soundtracks for the game, one which was used for the Japanese, European, and Australian releases, and another used for the North American version. The Japanese soundtrack was composed by Naofumi Hataya and Masafumi Ogata, who had previously worked together on the 8-bit version of Sonic the Hedgehog 2. The game features two vocal songs: "Sonic - You Can Do Anything", often unofficially referred to as "Toot Toot Sonic Warrior", composed by Ogata and originally written for Sonic the Hedgehog 2, and "Cosmic Eternity - Believe in Yourself", composed by Hataya. Both are sung by Keiko Utoku. The North American version was delayed a few months to have a new soundtrack written and produced by Spencer Nilsen, David Young, and Mark Crew. All the music, save for the "Past" songs, which were in sequenced PCM audio rather than Mixed Mode CD, were replaced, and the theme tunes were replaced with "Sonic Boom", composed by Nilsen and performed by a female ensemble called Pastiche. In 1994, an official soundtrack album, titled Sonic the Hedgehog Boom: The Music from Sonic CD and Sonic Spinball, was released; the album features several songs from Sonic CD and Sonic the Hedgehog Spinball.
The 2011 re-release of Sonic CD featured both soundtracks, with the option to switch between the two. However, "Sonic - You Can Do Anything" and "Cosmic Eternity - Believe in Yourself" were replaced with instrumental versions due to licensing issues. A 20th anniversary soundtrack CD was released in Japan in November 2011, featuring remastered versions of the soundtrack, along with "Sonic Boom" and exclusive arrangements by Cash Cash and Crush 40.
Alternate versions and ports
Sega ported Sonic CD to Windows in 1995, making it the first Sonic game released on personal computers. A second port of the game was given a retail release as part of the Sega PC brand in 1996, distributed by SoftKey in Japan on August 9, August 26 in North America, and October 3 in Europe. The PC version contains the complete FMV animation, and all versions of the game use the North American soundtrack. Despite the improvements in the opening and ending cutscenes, this version is known to suffer from technical issues such as slowdown. This version of the game is only compatible with older Windows 9x-based computers.
Canceled Nintendo DS port
Simon "Stealth" Thomley created an unofficial proof of concept port of Sonic CD for the Nintendo DS featuring Palmtree Panic and special stages, and the option to play as Tails or Knuckles the Echidna. This was a specialized, native port written specifically for the DS hardware, though it was cancelled as the DS was nearing the end of its life cycle.
On August 25, 2011, a remastered version of Sonic CD developed by Christian Whitehead, was released on Xbox Live Arcade and the European PlayStation Network on December 14, 2011, followed by the iOS App Store and Android Market on December 15, 2011 and the North American PlayStation Network on December 20, 2011. The PC version was released on January 19, 2012. A Windows Phone version was released in November 2012. Prior to the game's release, Android gaming tablets purchased from GameStop from November 2011 contained the full game. This version allows support for widescreen graphics and spin dash physics from Sonic 2, the ability to unlock Tails as a playable character, both the original Japanese/European soundtrack and the American soundtrack, as well as achievement and trophy support and iOS features. It game was released on the Ouya console on August 1, 2013. Sonic CD was also released on Apple TV on March 31, 2016. The iOS version was released for free on October 30, 2016. However, the version features in-app advertisements, and users must pay a fixed price to disable them.
Along with the other games in the series for the Genesis, Sonic CD has been included in a number of compilations. The game was released as part of Sega Family Fun Pak (1996), Sonic Action 4 Pack (2001), and Sega Mega Pack (2003) for Microsoft Windows, as well as Sonic Gems Collection (2005) for the Nintendo GameCube and PlayStation 2.
|This section is incomplete. This is because it does not provide sufficient information as to what critics praised and criticized. (June 2017)|
Sonic CD has received critical acclaim since its release; some have considered the game to be one of the greatest video games of all time. The iOS version currently holds a score of 93/100 on Metacritic, making it the highest rated game in the entire Sonic series on the site.
Reviewers praised the game's high-quality soundtrack and detailed graphics. GamePro called the visuals "brilliantly colorful". Justin Towell of GamesRadar claimed the Japanese soundtrack seems "totally fresh today" in their review of the 2011 version. IGN gave the game an Editor's Choice award, stating the game "looks great" and called the game "so unique, and cool". The game's time travel mechanic has received consistent praise from critics as well. GameSpot claimed the system added "a more satisfying way to play", and Destructoid claimed it added "depth" to game. The 3D special stages have also been praised despite framerate issues, and Allgame noted that Sonic CD was easily one of the best games available for the system.
Awards and honors
Mega placed Sonic CD at #3 on their list of the Top 10 Mega-CD Games of All Time. The game was awarded Best Sega CD Game of 1993 by Electronic Gaming Monthly. In May 2009, GamePro listed Sonic CD as one of the Top 20 Best Platformers: 1989 to 2009, ranking the game in 12th place. In March 2013, the game was nominated for and won the Windows Phone Game of the Year category of the Pocket Gamer Awards.
The Sega CD version of Sonic CD has sold 1.5 million copies, making it the best-selling game for the system. The Android port later received more than 100,000 paid downloads, while the PlayStation 3 version was ranked at the top spot on PlayStation Network's Top Sellers for December 2011.
Two characters introduced in the game, Amy Rose and Metal Sonic, became recurring characters in the Sonic series. Metal Sonic later appeared as a major antagonist in Knuckles' Chaotix (1995), Sonic Heroes (2003), and Sonic the Hedgehog 4: Episode II (2012), whose story heavily connects to that of Sonic CD's.  Amy Rose has also gone on to become a character in many subsequent games as well, most notably in Sonic Adventure.
For the series' 20th anniversary, Sega released Sonic Generations, a game that remade aspects of various past games from the franchise. Both versions feature remakes of the boss battle against Metal Sonic. The 2017 title Sonic Mania features an updated version of Sonic CD's "Stardust Speedway" level.
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