
Dr. Robotnik's Mean Bean Machine is a falling block puzzle game developed by Compile and published by Sega. It was released for the Genesis/Mega Drive in North America and Europe in November 1993, and ported to the Game Gear in 1993 and Master System in 1994.

Knuckles' Chaotix is a 1995 platform video game developed by Sega for the 32X. A spin-off from the Sonic the Hedgehog series, it features Knuckles the Echidna and four other characters known as the Chaotix, who must prevent Doctor Robotnik and Metal Sonic from obtaining six magic rings and conquering a mysterious island. Gameplay is similar to previous Sonic games: players complete levels while collecting rings and defeating enemies. Knuckles' Chaotix introduces a partner system whereby the player is connected to another character via a tether; the tether behaves like a rubber band and must be used to maneuver the characters.

SegaSonic the Hedgehog is a 1993 arcade game in the Sonic the Hedgehog series by Sega. Controlling Sonic the Hedgehog and his friends Mighty the Armadillo and Ray the Flying Squirrel, the player must escape an island as quickly as possible after they are kidnapped by series antagonist Doctor Eggman. The game is presented from an isometric perspective and players use a trackball to move the characters while dodging obstacles and collecting rings. The game was developed by Sega's arcade division, Sega AM3; it is one of four Sonic games to bear the SegaSonic name and was inspired by the 1984 game Marble Madness.

Shadow the Hedgehog is a platform game developed by Sega Studios USA, the former United States division of Sonic Team, and published by Sega as the sequel to Sonic Heroes. The game follows Shadow the Hedgehog, a creation of Doctor Eggman's grandfather, Prof. Gerald Robotnik, as he attempts to learn about his past while suffering from amnesia. Shadow the Hedgehog introduces third-person shooter elements and nonlinear gameplay to the Sonic franchise. To defeat enemies, Shadow can use various weapons and special attacks, and most levels have three possible missions that the player may choose to complete. The missions completed determine the game's plot and subsequently playable levels.

Sonic & All-Stars Racing Transformed, also known as Sonic Racing Transformed or Sonic Transformed, is a kart racing video game developed by Sumo Digital and published by Sega. It was released for the PlayStation 3, Xbox 360, and Wii U in November 2012, for PlayStation Vita in December 2012, for Microsoft Windows in January 2013, for Nintendo 3DS in February 2013, and for iOS and Android in January 2014. The PS3 and Wii U versions of the game were released in Japan on May 15, 2014.

Sonic & Sega All-Stars Racing is a 2010 kart racing video game, produced for Wii, Xbox 360, PlayStation 3, Nintendo DS, and Microsoft Windows, featuring characters from multiple Sega franchises. The game is the third title in the Sega All-Stars series, preceded by Sega Superstars Tennis. A mobile version was developed by Gameloft, and released for iOS in June 2011, as a paid download. A version for OS X was released by Feral Interactive in April 2013.

Sonic and the Black Knight is a 2009 platform video 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 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 Battle is a 2003 fighting video game developed by Sonic Team for the Game Boy Advance. 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 Boom: Fire & Ice is an action-adventure platform game developed by Sanzaru Games and published by Sega for the Nintendo 3DS. It is part of the Sonic Boom spin-off franchise of the Sonic the Hedgehog series, along with the games Rise of Lyric and Shattered Crystal and a television series. Originally planned for a release in late 2015, Fire & Ice was released in North America and Europe in September 2016, and in Australia the following month. While the game received mixed reviews, it was seen as an improvement over Rise of Lyric and Shattered Crystal.

Sonic Boom: Rise of Lyric is an action-adventure game developed by Big Red Button and published by Sega for the Wii U console. Along with Sonic Boom: Shattered Crystal for the Nintendo 3DS, the game is a spin-off of Sega's Sonic the Hedgehog series and is a part of the Sonic Boom franchise, which also consists of an animated television series, a comic series by Archie Comics, and a toyline by Tomy.

Sonic Boom: Shattered Crystal is an action-adventure video game developed by Sanzaru Games and published by Sega in Japan and North America and Nintendo in Europe and Australia for the Nintendo 3DS. Along with its Wii U sibling Sonic Boom: Rise of Lyric, Shattered Crystal is a spin-off of Sega's Sonic the Hedgehog franchise and is a part of the Sonic Boom sub-franchise, which consists also of an animated television series, whose games serve as its prequels. The two games together formed the third and final part in Sega's exclusivity agreement with Nintendo, following Sonic Lost World and Mario & Sonic at the Sochi 2014 Olympic Winter Games in 2013. Both games were released in North America, Europe, and Australia in November 2014. A sequel, Fire & Ice, was released for the 3DS on September 27, 2016.

Sonic Chronicles: The Dark Brotherhood, or simply Sonic Chronicles, is a role-playing video game developed by BioWare and published by Sega for the Nintendo DS. The game was BioWare's first handheld video game project, and is a part of the Sonic the Hedgehog series. Sonic Chronicles initially focuses on the events surrounding the kidnapping of Knuckles and the disappearance of the Chaos Emeralds after the defeat of Doctor Eggman, before moving on to follow the cast of characters across two dimensions as they encounter a new ally, Shade the Echidna, and seek to stop the invasion of their world by Ix, the leader of Shade's tribe, the Nocturnus.

Sonic Drift is a 1994 racing video game developed and published by Sega for the Game Gear in Japan. It features Sonic the Hedgehog, Miles "Tails" Prower, Amy Rose, and Doctor Robotnik.

Sonic Drift 2, released in Europe as Sonic Drift Racing, is a kart racing video game by Sega for the Game Gear. The sequel to Sonic Drift, it was released in Japan and Europe in March 1995 and in North America in November 1995. It added three characters: Knuckles, Fang the Sniper, and Metal Sonic, and marked the first time the last two were playable characters.

Sonic Free Riders is a motion controlled racing video game developed by Sonic Team and published by Sega exclusively for the Xbox 360. The game requires the use of Microsoft's Kinect peripheral and was a Kinect launch title in November 2010.
Sonic Jump is a vertical platform game developed by Hardlight and published by Sega for iOS and Android. On its original release, the app was released in Japan on February 21, 2005, and then North America USA, South America, resume Asia, Africa, and Europe UK worldwide in April 2007. It was then remade and released worldwide on iOS as a paid download on 18 October 2012, and then released for Android on 21 December 2012.

Sonic Jump Fever is a 2014 vertical platform game developed by British studio Hardlight. It is the sequel to Sonic Jump. The game was made available for iOS and Android systems on July 10, 2014.

Sonic Labyrinth is an action and puzzle game developed by Minato Giken and published by Sega for the Game Gear in 1995. The game features Sonic the Hedgehog exploring maze-like stages from an isometric perspective. Dr. Robotnik has robbed Sonic of his trademark speed, so Sonic walks slowly but can roll into a ball and dash across the stages. Critics thought the game was a unique addition to the Sonic library but flawed by convoluted controls and repetitive gameplay. It has received generally negative reviews in retrospect and is considered one of the worst Sonic games ever. Sonic Labyrinth was rereleased on Sonic Adventure DX and on Sonic Mega Collection Plus, as well as the Nintendo 3DS in 2012.

Sonic Pinball Party is a video game released for the 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 R is a 1997 racing video game developed by Traveller's Tales and Sonic Team for the Sega Saturn. It is the third racing game in the Sonic the Hedgehog series, and the first to feature 3D computer graphics. The player races one of ten Sonic characters in various Sonic-themed race tracks as they attempt to stop Doctor Robotnik from stealing the Chaos Emeralds and enslaving the world. Sonic R features single-player and multiplayer game modes, and while similar to kart racing games such as Mario Kart, it places an emphasis on jumping and exploration. By collecting items and completing objectives, players can unlock secret characters.

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 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 pure racing game in the Sonic the Hedgehog series, and the second entry in the Sonic Riders trilogy, a spin-off of the main series.

Sonic Rivals is a racing video game, part of the Sonic the Hedgehog series that was released in late 2006. It is the first Sonic game developed by Backbone Entertainment, for the PlayStation Portable. The game was also supervised by members of Sega Studio USA including Takashi Iizuka.

Sonic Rivals 2 is a 2007 racing video game, the sequel to the 2006 game Sonic Rivals. The game was developed by Backbone Entertainment and supervised by Sega Studio USA, for the PlayStation Portable handheld video game console. Sonic Rivals 2 was released across November and December 2007.

Sonic Runners was a 2015 endless runner 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 from a side-scrolling perspective using the touchscreen. The game was free-to-play, featured a wide variety of playable characters from the Sonic series, and received periodic updates.

Sonic Runners Adventure is an endless runner platform game published by Gameloft for Android and Java-based mobile phones. As part of the Sonic the Hedgehog series, the game serves as a sequel to 2015's Sonic Runners. The game was first released in select regions on June 10, 2017, and was released to the rest of the world on August 9, 2017.

Sonic Shuffle is a Sonic the Hedgehog-themed party game developed and published by Sega for the Dreamcast in 2000. The game plays like a board game much in the same vein as Nintendo's Mario Party series, with up to four players moving their characters across a game board filled with a variety of spaces which can trigger different events. Some spaces will launch minigames that pit the players against each other in short competitive events.

Sonic the Hedgehog Spinball is a 1993 pinball video game developed by Sega Technical Institute and published by Sega. It is a spinoff of the Sonic the Hedgehog series set in the continuity of the Sonic the Hedgehog animated series. Players control Sonic the Hedgehog, who must stop Doctor Robotnik from enslaving the population in a giant pinball-like mechanism. The game is set in a series of pinball machine-like environments, and Sonic acts as a pinball for the majority of the game.

Sonic the Fighters, also known as Sonic Championship on arcade versions outside Japan, is a fighting game developed by Sega AM2. First released in 1996 in arcades on Sega's Model 2 arcade system, Sonic the Fighters pits players in one-on-one battles with a roster of characters from the Sonic the Hedgehog series.

Tails Adventure is a platform game developed by Aspect and published by Sega in 1995 for the Game Gear. The game stars Tails from the Sonic the Hedgehog series in a solo adventure, as he collects an array of items to help him explore Tails Island and defeat the enemies inhabiting it. The gameplay is more slow-paced than other Sonic games, with Tails only capable of walking and flying at a moderate speed. The stages are explored in a non-linear fashion, with newly collected items opening up pathways in previous areas.

Tails' Skypatrol is a 1995 horizontal-scrolling shooter video game published in Japan by Sega for the Game Gear. It is a spin-off of the Sonic the Hedgehog franchise, and one of two Game Gear games to star Sonic's sidekick Tails. The player controls the titular character in his quest to stop the evil witch Witchcart before she conquerors an island and turns its inhabitants into crystals. Gameplay involves shooting enemies, collecting power-ups, and defeating bosses.