Billy Hatcher and the Giant EggW
Billy Hatcher and the Giant Egg

Billy Hatcher and the Giant Egg is a platform video game developed by Sonic Team and published by Sega for the Nintendo GameCube in 2003. It was ported to Microsoft Windows and Mac OS X in 2006, for release in Europe.

Sonic & KnucklesW
Sonic & Knuckles

Sonic & Knuckles is a 1994 platform game developed and published by Sega. It is part of the Sonic the Hedgehog series and the sequel to Sonic the Hedgehog 3 (1994). Players control Sonic the Hedgehog and Knuckles the Echidna in their quests to save Angel Island; Sonic tries to prevent Doctor Robotnik from relaunching his orbital weapon, the Death Egg, while Knuckles scuffles with Robotnik's minion, EggRobo. The game takes place across six levels in which the player collects rings and fights bosses.

Burning RangersW
Burning Rangers

Burning Rangers is a 1998 action game developed by Sonic Team and published by Sega for the Sega Saturn. Burning Rangers is set in a futuristic society in which fire is the remaining danger. Players control one of an elite group of firefighters, the Burning Rangers, who extinguish fires and rescue civilians in burning buildings. Most of the tasks the players complete are centred around collecting energy crystals to transport civilians to safety. In lieu of an in-game map, Burning Rangers features a voice navigation system which directs players through corridors.

ChuChu Rocket!W
ChuChu Rocket!

ChuChu Rocket! is an action puzzle game developed by Sonic Team and published by Sega. Released for the Dreamcast in 1999, it was the first game for the system to support online console gaming. Players must place arrows on a board to lead mice into escape rockets while avoiding cats. The game features single-player modes in which a player must save all the mice on a board, and a multiplayer mode in which players battle to collect the most mice.

Sonic the Hedgehog 2W
Sonic the Hedgehog 2

Sonic the Hedgehog 2 is a 1992 platform game developed and published by Sega for the Sega Genesis. It is the second main entry in the Sonic the Hedgehog series, and introduced Sonic's sidekick, Miles "Tails" Prower, controllable by a second player. In the story, Sonic and Tails must stop series antagonist Dr. Ivo Robotnik from stealing the Chaos Emeralds to power his space station, the Death Egg.

Nights into DreamsW
Nights into Dreams

Nights into Dreams is a 1996 action game developed by Sonic Team and published by Sega for the Sega Saturn. The story follows teenagers Elliot Edwards and Claris Sinclair, who enter Nightopia, a dream world where all dreams take place. With the help of Nights, an exiled "Nightmaren", they begin a journey to stop the evil ruler Wizeman from destroying Nightopia and consequently the real world. Players control Nights flying through Elliot and Claris's dreams to gather enough energy to defeat Wizeman and save Nightopia. The game is presented in 3D and imposes time limits on every level, in which the player must accumulate points to proceed.

Phantasy Star 0W
Phantasy Star 0

Phantasy Star 0, also known in Australia and Europe as Phantasy Star: ZERO and sometimes in North America as Phantasy Star Ø, is a Nintendo DS game in the Phantasy Star series, developed by Sonic Team and published by Sega. The game was released in Japan on December 25, 2008; in North America on November 10, 2009; and in Europe on February 12, 2010. The game expands on the gameplay mechanics of Phantasy Star Online, partly by borrowing some elements from fellow online Phantasy Star title Phantasy Star Universe, such as a fully realized story mode for offline play.

Phantasy Star OnlineW
Phantasy Star Online

Phantasy Star Online is an online role-playing game (RPG) developed by Sonic Team and published by Sega in 2000 for the Dreamcast. It was the first online RPG for game consoles; players adventure with up to three others over the internet to complete quests, collect items, and fight enemies in real-time action RPG combat. The story is unrelated to previous games in the Phantasy Star series.

Phantasy Star Online Episode III: C.A.R.D. RevolutionW
Phantasy Star Online Episode III: C.A.R.D. Revolution

Phantasy Star Online Episode III: C.A.R.D. Revolution is a turn-based role-playing video game released for the GameCube in 2003. It has a card based play style, making it unique among games in the Phantasy Star Online series. The story of the game takes place twenty-one years after the first two episodes.

Phantasy Star PortableW
Phantasy Star Portable

Phantasy Star Portable is an action role-playing game co-developed by Sonic Team and Alfa System, and published by Sega for the PlayStation Portable. Sega released the game to Japan in July 2008, and to other markets in 2009.

Phantasy Star UniverseW
Phantasy Star Universe

Phantasy Star Universe (PSU) is an action role-playing video game developed by Sega's Sonic Team for the Microsoft Windows, PlayStation 2 and Xbox 360 platforms. It was released in Japan for the PC and PlayStation 2 on August 31, 2006; the Xbox 360 version was released there on December 12, 2006. Its North American release was in October 2006, in all formats. The European release date was November 24 the same year, while the Australian release date was November 30.

Puyo Pop (video game)W
Puyo Pop (video game)

Puyo Pop, known as Minna de Puyo Puyo in Japan, is the first of the Puyo Puyo games made for the Game Boy Advance, and the first produced by Sonic Team. It is the last game to use the original Madō Monogatari cast.

Puyo Pop FeverW
Puyo Pop Fever

Puyo Pop Fever is a puzzle video game developed by Sonic Team. It is the fifth main installment in the Puyo Puyo puzzle game series and the second Puyo Puyo game to be programmed by Sonic Team after Puyo Pop. This was the start of the "reboot" series of the Puyo Pop franchise, with a new plot discussing how Accord lost the flying cane. Sega, which acquired the series' rights from Compile in 1998, published all the Japanese releases of the game. The game was scarcely released internationally, and certain versions were released by other publishers in those areas. Only the GameCube and Nintendo DS versions were released in North America. Europe received both versions plus the PlayStation 2, Xbox, Game Boy Advance, and PlayStation Portable versions. The NAOMI port to Dreamcast, released exclusively for the Japanese arcade cabinets, was the last Dreamcast game developed by Sonic Team, as well as the last first-party title released on the platform. The Dreamcast version is the only console version to use sprites in place of 3D models.

Puyo Puyo 7W
Puyo Puyo 7

Puyo Puyo 7 is the seventh installment in the Puyo Puyo series released in Japan for the Nintendo DS on July 30, 2009, and for the PlayStation Portable and Wii on November 26, 2009.

Puyo Puyo ChampionsW
Puyo Puyo Champions

Puyo Puyo Champions, is a puzzle video game developed and published by Sega for the Nintendo Switch, Xbox One, PlayStation 4, and in 2019 for Microsoft Windows.

Puyo Puyo ChronicleW
Puyo Puyo Chronicle

Puyo Puyo Chronicle (ぷよぷよクロニクル) is a puzzle video game developed by Sonic Team and published by Sega for the Nintendo 3DS, to celebrate the 25° anniversary. It is the first release featuring 3D models for characters instead of the traditional 2D.

Puyo Puyo Fever 2W
Puyo Puyo Fever 2

Puyo Puyo Fever 2 is a video game developed by Sonic Team and published by Sega. The game was released as a sequel to the previous title, Puyo Pop Fever. The gameplay remains relatively unchanged, but several new modes are introduced. The game features nine different plots, each one pertaining to its three protagonists. Puyo Puyo Fever 2 was released exclusively in Japan for the PlayStation 2 and PlayStation Portable in November 2005, and later for the Nintendo DS the following month.

Puyo Puyo TetrisW
Puyo Puyo Tetris

Puyo Puyo Tetris is a puzzle video game developed by Sonic Team and published by Sega. The game is a crossover between the Puyo Puyo series and the Tetris franchise, and features various gameplay modes incorporating both aspects. The game includes characters modeled and named after the seven Tetrominos, which are different puzzle pieces each made of four blocks.

Puyo Puyo Tetris 2W
Puyo Puyo Tetris 2

Puyo Puyo Tetris 2 is a puzzle video game developed and published by Sega. It is a direct sequel to Puyo Puyo Tetris. The game was released for PlayStation 4, Xbox One, Nintendo Switch, PlayStation 5 and Xbox Series X/S in December 2020, with a Microsoft Windows version scheduled for release in early 2021.

Puyo Puyo!! 20th AnniversaryW
Puyo Puyo!! 20th Anniversary

Puyo Puyo!! 20th Anniversary is a puzzle game developed by Sonic Team and published by Sega. The game honored the twentieth year of the Puyo Puyo series, and was first released for the Nintendo DS in July 2011, and later for Wii, Nintendo 3DS, and PlayStation Portable in December 2011.

Puyopuyo!! QuestW
Puyopuyo!! Quest

Puyopuyo!! Quest (ぷよぷよ!!クエスト?) and Puyopuyo!! Quest Arcade, are two free-to-play puzzle Role-playing video games developed by Sonic Team and published by Sega for the iOS, Android, Kindle Fire and Arcade, released in Japan.

Puyopuyo!! QuestW
Puyopuyo!! Quest

Puyopuyo!! Quest (ぷよぷよ!!クエスト?) and Puyopuyo!! Quest Arcade, are two free-to-play puzzle Role-playing video games developed by Sonic Team and published by Sega for the iOS, Android, Kindle Fire and Arcade, released in Japan.

The Rub Rabbits!W
The Rub Rabbits!

The Rub Rabbits!, known in Japan as Aka-chan wa Doko Kara Kuru no? , is a minigame compilation video game developed by Sonic Team and published by Sega for the Nintendo DS handheld video game console. It was first released in Japan on October 20, 2005, and was later released in Europe on February 10, 2006, and in North America three days later. It is a prequel to Feel the Magic: XY/XX.

Samba de AmigoW
Samba de Amigo

Samba de Amigo is a rhythm game developed by Sonic Team and published by Sega. The game was released in arcades in December 1999, and for the Dreamcast video game console in 2000. A port for the Wii was also developed by Gearbox Software and Escalation Studios and released in 2008. In Samba de Amigo, the player uses controllers shaped like maracas with the goal of matching a series of patterns displayed on-screen. The music in Samba de Amigo is made of primarily popular Latin music songs rather than common or traditional samba. The game also features non-Latin pop songs.

Sega SuperstarsW
Sega Superstars

Sega Superstars is a party video game developed by Sonic Team for the PlayStation 2. It was published by Sega and released in Europe on October 22, 2004; in North America in November 3, 2004; and in Japan in November 11, 2004. The game features several minigames based on various Sega titles that are controlled using the EyeToy peripheral. This is the last game to feature Ryan Drummond as the voice of Sonic before being replaced by Jason Griffith.

Sonic the Hedgehog 3W
Sonic the Hedgehog 3

Sonic the Hedgehog 3 is a 1994 platform game developed and published by Sega. It is part of the Sonic the Hedgehog series and follows Sonic the Hedgehog 2 (1992). After Doctor Robotnik's spaceship, the Death Egg, crash-lands on a mysterious floating island, Sonic and Tails attempt to retrieve the Chaos Emeralds to stop it from relaunching. Sonic 3 introduces Knuckles the Echidna, the island guardian, who lays traps for Sonic and Tails. Like previous games, players traverse side-scrolling levels at high speeds while collecting rings and defeating enemies.

Sonic AdvanceW
Sonic Advance

Sonic Advance is a 2001 platform game developed by Dimps for the Game Boy Advance (GBA). It was the first Sonic the Hedgehog released on a Nintendo console and was produced in commemoration of the series' tenth anniversary. The story follows Sonic, Tails, Knuckles, and Amy as they journey to stop Doctor Eggman from taking over the world. Controlling a character, players are tasked with completing each level, defeating Eggman and his robot army, and collecting the seven Chaos Emeralds.

Sonic Advance 2W
Sonic Advance 2

Sonic Advance 2 is a 2002 side-scrolling platform game developed by Dimps for the Game Boy Advance. It is an installment in the Sonic the Hedgehog series and the sequel to 2001's Sonic Advance. The story follows Sonic as he sets out to save his friends and retrieve the seven magical Chaos Emeralds from series antagonist Doctor Eggman. Gameplay consists of the player completing various levels as one of five characters, each with their own unique attributes. After each zone is completed, the player faces Doctor Eggman in a boss battle.

Sonic Advance 3W
Sonic Advance 3

Sonic Advance 3 is a platform video game developed by Dimps and Sonic Team for the Game Boy Advance in 2004. It is part of the Sonic the Hedgehog series, and the sequel to Sonic Advance 2. The game stars the characters Sonic, Tails, Amy, Knuckles, and Cream as they seek to keep Doctor Eggman and his robot assistant Gemerl from building empires on each of seven chunks Eggman has divided the Earth into.

Sonic AdventureW
Sonic Adventure

Sonic Adventure is a 1998 platform game for Sega's Dreamcast and the first main Sonic the Hedgehog game to feature 3D gameplay. The story follows Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna, Amy Rose, Big the Cat, and E-102 Gamma in their quests to collect the seven Chaos Emeralds and stop series antagonist Doctor Robotnik from unleashing Chaos, an ancient evil. Controlling one of the six characters—each with their own special abilities—players explore a series of themed levels to progress through the story. Sonic Adventure retains many elements from prior Sonic games, such as power-ups and the ring-based health system. Outside the main game, players can play minigames like racing and interact with Chao, a virtual pet.

Sonic Adventure 2W
Sonic Adventure 2

Sonic Adventure 2 is a 2001 platform game developed by Sonic Team USA and published by Sega. It was the final Sonic the Hedgehog game for the Dreamcast after Sega discontinued the console. It features two good-vs-evil stories: Sonic the Hedgehog, Miles "Tails" Prower and Knuckles the Echidna attempt to save the world, while Shadow the Hedgehog, Doctor Eggman and Rouge the Bat attempt to conquer it. The stories are divided into three gameplay styles: fast-paced platforming for Sonic and Shadow, multi-directional shooting for Tails and Eggman, and action-exploration for Knuckles and Rouge.

Sonic AdventureW
Sonic Adventure

Sonic Adventure is a 1998 platform game for Sega's Dreamcast and the first main Sonic the Hedgehog game to feature 3D gameplay. The story follows Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna, Amy Rose, Big the Cat, and E-102 Gamma in their quests to collect the seven Chaos Emeralds and stop series antagonist Doctor Robotnik from unleashing Chaos, an ancient evil. Controlling one of the six characters—each with their own special abilities—players explore a series of themed levels to progress through the story. Sonic Adventure retains many elements from prior Sonic games, such as power-ups and the ring-based health system. Outside the main game, players can play minigames like racing and interact with Chao, a virtual pet.

Sonic & KnucklesW
Sonic & Knuckles

Sonic & Knuckles is a 1994 platform game developed and published by Sega. It is part of the Sonic the Hedgehog series and the sequel to Sonic the Hedgehog 3 (1994). Players control Sonic the Hedgehog and Knuckles the Echidna in their quests to save Angel Island; Sonic tries to prevent Doctor Robotnik from relaunching his orbital weapon, the Death Egg, while Knuckles scuffles with Robotnik's minion, EggRobo. The game takes place across six levels in which the player collects rings and fights bosses.

Sonic and the Black KnightW
Sonic and the Black Knight

Sonic and the Black Knight is a 2009 platform game developed by Sonic Team and published by Sega as part of the Sonic the Hedgehog series. The game was released on the Wii as the second entry in the Sonic Storybook series, following Sonic and the Secret Rings (2007). Set in the world of King Arthur, the game combines Sonic's trademark speed with a new sword fighting system, utilizing the Wii Remote's motion-sensing functionality.

Sonic and the Secret RingsW
Sonic and the Secret Rings

Sonic and the Secret Rings is a 2007 platform video game developed by Sonic Team and published by Sega for the Wii. A spin-off to the Sonic the Hedgehog series, it is the first title in the franchise for the system, and follows Sonic the Hedgehog's quest to stop an evil genie named the Erazor Djinn. In addition to the basic platforming gameplay of previous Sonic titles, Secret Rings uses a system of experience points and levels, as well as special moves that are unlocked via leveling up.

Sonic BattleW
Sonic Battle

Sonic Battle is a fighting video game developed by Sonic Team for the Game Boy Advance. It was published by Sega in Japan and THQ in North America and Europe. It is the second fighting game in the Sonic the Hedgehog series, the first game being Sonic the Fighters. It is the sequel to 2002's Sonic Advance 2 and was released in Japan in December 2003 and in North America and Europe in early 2004.

Sonic ColorsW
Sonic Colors

Sonic Colors is a 2010 platform video game published by Sega. An installment in the Sonic the Hedgehog series, it follows Sonic's quest to stop his nemesis Doctor Eggman from enslaving an alien race and taking over the world. The gameplay is similar to prior Sonic games, with players collecting rings and defeating enemies; the camera perspective occasionally switches from third-person to side-scrolling perspectives. The game also introduces Wisps, power-ups the player can use to increase attack power and reach new areas.

Sonic ForcesW
Sonic Forces

Sonic Forces is a platform game developed by Sonic Team and published by Sega. Produced in commemoration of the Sonic the Hedgehog franchise's 25th anniversary, it was released for Microsoft Windows, Nintendo Switch, PlayStation 4, and Xbox One in November 2017. The story sees Sonic the Hedgehog joining a resistance force to stop Doctor Eggman. It features three gameplay modes: "Classic", side-scrolling gameplay similar to the original Sega Genesis Sonic games; "Modern", 3D gameplay similar to Sonic Unleashed and Sonic Colors; and a mode featuring the "Avatar", the player's custom character.

Sonic Gems CollectionW
Sonic Gems Collection

Sonic Gems Collection is a 2005 compilation of Sega video games, primarily those in the Sonic the Hedgehog series. The emulated games span multiple genres and consoles—from the Sega Genesis to the Sega Saturn—and retain the features and errors of their initial releases with minimal edits. Player progress is rewarded with demos of other Sonic games, videos, and promotional artwork spanning the history of the Sonic franchise. While its 2002 predecessor, Sonic Mega Collection, comprised the more popular Sonic games, Gems Collection focuses on more obscure games, such as Sonic CD and Sonic the Fighters. Other non-Sonic games are included, but some, such as the Streets of Rage trilogy, are omitted in the Western localization.

Sonic GenerationsW
Sonic Generations

Sonic Generations is a 2011 platform game developed by Sonic Team and published by Sega for the PlayStation 3, Xbox 360, Nintendo 3DS, and Microsoft Windows. Produced in commemoration of the 20th anniversary of the Sonic the Hedgehog series, the game follows Sonic and his sidekick Tails as they form an alliance with their past selves. It features two gameplay styles: "Classic", which plays from a side-scrolling perspective like that of the original Sega Genesis Sonic games, and "Modern", 3D levels similar to those in Sonic Unleashed and Sonic Colors.

Sonic JamW
Sonic Jam

Sonic Jam is a video game compilation developed by Sonic Team and published by Sega for the Sega Saturn. It was released in Japan in June 1997, and in North America and Europe two months later. It contains the four main Sonic the Hedgehog games released on the Sega Genesis: Sonic the Hedgehog (1991), Sonic the Hedgehog 2 (1992), Sonic the Hedgehog 3 (1994), and Sonic & Knuckles (1994). It also features a 3D environment, "Sonic World", which doubles as an interactive museum of Sonic the Hedgehog content.

Sonic Lost WorldW
Sonic Lost World

Sonic Lost World is an action-adventure platform game developed by Sonic Team. It is part of the Sonic the Hedgehog series, and was released in October 2013 for the Wii U and Nintendo 3DS in PAL regions by Nintendo and by Sega in North America and Japan. A port for Microsoft Windows was later released in November 2015.

Sonic Mega CollectionW
Sonic Mega Collection

Sonic Mega Collection is a video game compilation developed by Sonic Team and published by Sega in 2002 for the GameCube. The compilation contains twelve to fourteen games originally released on the Sega Genesis. Ten of the included games are installments of the Sonic the Hedgehog series, while the remaining two to four games are only related to the series through its publisher, Sega.

Sonic Pinball PartyW
Sonic Pinball Party

Sonic Pinball Party is a video game released for Game Boy Advance in 2003. It is a celebration of sorts for Sonic Team featuring many references to its previous games, mostly Sonic. There was also a release on a Twin Pack cartridge bundled with Sonic Battle and Sonic Advance respectively in 2005.

Sonic RidersW
Sonic Riders

Sonic Riders is a 2006 racing video game for the GameCube, PlayStation 2, and Xbox in which the player controls characters from the Sonic the Hedgehog series on hoverboards. In the game's 16 tracks, the player competes against characters—either controlled by computers or other players—in story and battle modes. It was developed by Sonic Team and Now Production, published by Sega, and released in February 2006 in Japan and North America. It was released in Europe the following month and for Windows at the end of the year. A Game Boy Advance version, developed by Backbone Entertainment, was canceled.

Sonic Riders: Zero GravityW
Sonic Riders: Zero Gravity

Sonic Riders: Zero Gravity is a hoverboard racing video game developed by Sonic Team and published by Sega for the PlayStation 2 and Wii. It is the fifth racing game in the Sonic the Hedgehog series, and the second entry in the Sonic Riders trilogy, a spin-off of the main series. A sequel, Sonic Free Riders, was released for the Xbox 360 in 2010.

Sonic RunnersW
Sonic Runners

Sonic Runners was a 2015 side-scrolling endless running video game in the Sonic the Hedgehog franchise for Android and iOS. It was developed by Sonic Team as its first Sonic game exclusive to smartphones and published by Sega. In Sonic Runners, the player-character constantly ran forward, and players controlled their jumping using the touchscreen. The game featured a wide variety of playable characters from the Sonic series, and was free-to-play and received periodic updates.

Sonic RushW
Sonic Rush

Sonic Rush is a 2005 platform video game developed by Sonic Team and Dimps for the Nintendo DS as part of Sega's Sonic the Hedgehog series. It was released on November 15, 2005 in North America, November 18 in the PAL region, and November 23 in Japan. It is a 2D platform game, similar to earlier games in the series as well as later ones like Sonic Advance. Levels in the game are side-scrolling and displayed using both of the DS's screens. However, boss battles, the main characters, and a special stage are rendered in 3D, creating a 2.5D effect. The game's storyline follows the intertwining adventures of a new character, Blaze the Cat, and the series' main character, Sonic the Hedgehog. They respectively battle Doctor Eggman and his doppelgänger Eggman Nega at certain points.

Sonic Rush AdventureW
Sonic Rush Adventure

Sonic Rush Adventure is a 2007 adventure platform game for the Nintendo DS and the sequel to 2005's Sonic Rush. It follows Sonic the Hedgehog and Tails, who are teleported to an alternate dimension and seek the help of Blaze the Cat, while battling a band of robot pirates. Gameplay is similar to prior installments in the Sonic the Hedgehog franchise, with players controlling Sonic or Blaze through a series of side-scrolling levels while collecting rings and defeating enemies. Sonic Rush Adventure deviates from prior games with its elements of sea travel, featuring boating minigames that take advantage of the DS's touchscreen.

Sonic the Hedgehog (1991 video game)W
Sonic the Hedgehog (1991 video game)

Sonic the Hedgehog is a platform game developed by Sonic Team and published by Sega for the Sega Genesis home video game console. It was released in North America in June 1991 and in PAL regions and Japan the following month. The game features an anthropomorphic hedgehog named Sonic in a quest to defeat Dr. Robotnik, a scientist who has imprisoned animals in robots and stolen the powerful Chaos Emeralds. The gameplay involves collecting rings as a form of health, and a simple control scheme, with jumping and attacking controlled by a single button.

Sonic the Hedgehog (2006 video game)W
Sonic the Hedgehog (2006 video game)

Sonic the Hedgehog is a 2006 platform game developed by Sonic Team and published by Sega. It was produced in commemoration of the Sonic series' 15th anniversary, and intended as a reboot for the seventh generation video game consoles. Players control Sonic, Shadow, and new character Silver, who battle Solaris, an ancient evil pursued by Doctor Eggman. Each playable character has his own campaign and abilities, and must complete levels, explore hub worlds and fight bosses to advance the story. In multiplayer modes, players can work cooperatively to collect Chaos Emeralds or race to the end of a level.

Sonic the Hedgehog 2W
Sonic the Hedgehog 2

Sonic the Hedgehog 2 is a 1992 platform game developed and published by Sega for the Sega Genesis. It is the second main entry in the Sonic the Hedgehog series, and introduced Sonic's sidekick, Miles "Tails" Prower, controllable by a second player. In the story, Sonic and Tails must stop series antagonist Dr. Ivo Robotnik from stealing the Chaos Emeralds to power his space station, the Death Egg.

Sonic the Hedgehog 3W
Sonic the Hedgehog 3

Sonic the Hedgehog 3 is a 1994 platform game developed and published by Sega. It is part of the Sonic the Hedgehog series and follows Sonic the Hedgehog 2 (1992). After Doctor Robotnik's spaceship, the Death Egg, crash-lands on a mysterious floating island, Sonic and Tails attempt to retrieve the Chaos Emeralds to stop it from relaunching. Sonic 3 introduces Knuckles the Echidna, the island guardian, who lays traps for Sonic and Tails. Like previous games, players traverse side-scrolling levels at high speeds while collecting rings and defeating enemies.

Sonic the Hedgehog 4: Episode IW
Sonic the Hedgehog 4: Episode I

Sonic the Hedgehog 4: Episode I is a 2010 side-scrolling platform game developed by Dimps, with assistance from Sonic Team, and published by Sega. It is part of the Sonic the Hedgehog series and acts as a sequel to Sonic & Knuckles (1994). Episode I follows Sonic as he sets out to stop Doctor Eggman, who has returned following his defeat in Sonic & Knuckles. The game returns to the Sega Genesis style of Sonic gameplay, with movement restricted to a 2D plane. Like previous Sonic games, the player races through levels, collecting rings while rolling into a ball to attack enemies. The game also features special stages in which the player collects Chaos Emeralds and online leaderboards comparing level completion times and high scores.

Sonic the Hedgehog 4: Episode IIW
Sonic the Hedgehog 4: Episode II

Sonic the Hedgehog 4: Episode II is a 2012 episodic platform video game in the Sonic the Hedgehog series, and the sequel to Sonic the Hedgehog 4: Episode I. The game was developed by Dimps, with assistance from Sonic Team, and published by Sega. The game was intended to emulate the original Sonic the Hedgehog games on the Sega Genesis.

Sonic UnleashedW
Sonic Unleashed

Sonic Unleashed is a 2008 platform video game in the Sonic the Hedgehog series. The story follows Sonic as he attempts to restore the world after his nemesis Doctor Eggman shatters it with a powerful laser to unleash Dark Gaia, an ancient evil, while dealing with having become a "Werehog", a werewolf-esque transformation, which he gains after coming into contact with the energy of Dark Gaia. Gameplay features two distinct styles, with each being played either during daytime or nighttime. Daytime stages incorporate Sonic's traditional platforming and trademark speed, with a combination of behind-the-back third-person viewpoints and 2D side-scroller platforming; gameplay seamlessly transitions between these two views. Night-time levels see Sonic transform into the Werehog; gameplay slows down to accommodate greater platform play, and involves combat against waves of enemies using the Werehog's brute strength.

Sonic AdvanceW
Sonic Advance

Sonic Advance is a 2001 platform game developed by Dimps for the Game Boy Advance (GBA). It was the first Sonic the Hedgehog released on a Nintendo console and was produced in commemoration of the series' tenth anniversary. The story follows Sonic, Tails, Knuckles, and Amy as they journey to stop Doctor Eggman from taking over the world. Controlling a character, players are tasked with completing each level, defeating Eggman and his robot army, and collecting the seven Chaos Emeralds.