Unlicensed developers and fans have created unofficial Sonic media, especially video games, relating to the Sonic the Hedgehog franchise. These products include video games, video game mods, ROM hacks, comics, and animations. Due to the popularity of the franchise, some of these products have received media attention. Sega is permissive of most fangames, as long as they are not for profit. [1] Some Sonic fan game developers have gone on to work on official Sonic content, most prominently Sonic Mania (2017), while others have subsequently created original games that feature Sonic-inspired mechanics.
The following are all original games based on the Sonic series:
The following are unofficial ports of Sonic games for various systems:
The following are some of the modified versions of existing Sonic games, created using special programs and utilities.
Sonic the Hedgehog is a character created by the Japanese game developers Yuji Naka and Naoto Ohshima. He is the star of the Sonic the Hedgehog franchise and the mascot of the Japanese video game company Sega. Sonic is an anthropomorphic blue hedgehog who can run at supersonic speed. He races through levels, collecting rings and avoiding obstacles, as he seeks to defeat his archenemy, Doctor Eggman. He is accompanied by supporting characters, such as his best friend and sidekick Miles "Tails" Prower, self-proclaimed girlfriend Amy Rose, and friendly rival Knuckles the Echidna.
Sonic the Hedgehog 3 is a 1994 platform game developed and published by Sega for the Sega Genesis. Like previous Sonic games, players traverse side-scrolling levels while collecting rings and defeating enemies. They control Sonic and Tails, who attempt to retrieve the Chaos Emeralds to stop Doctor Robotnik from relaunching his space station, the Death Egg, after it crash-lands on a mysterious floating island. Sonic 3 introduces Knuckles the Echidna, the island guardian, who lays traps for Sonic and Tails.
Knuckles the Echidna is a character from Sega's Sonic the Hedgehog series. He is a red anthropomorphic short-beaked echidna who is Sonic's secondary best friend and former rival. Determined and serious, but sometimes gullible, he fights his enemies using brute force and strength. His role is established as the guardian of the Master Emerald, a large gemstone which controls the series' integral Chaos Emeralds, and is the last living member of his tribe, the Knuckles Clan.
Sonic Adventure 2 is a 2001 platform game developed by Sonic Team USA and published by Sega for the Dreamcast. 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, third-person shooting for Tails and Eggman, and action-adventure exploration for Knuckles and Rouge. Like previous Sonic the Hedgehog games, the player completes levels while collecting rings and defeating enemies. Outside the main gameplay, they can interact with Chao, a virtual pet, and compete in multiplayer battles.
Knuckles' Chaotix is a 1995 platform 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. The 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.
Green Hill Zone is the first level of the platform game Sonic the Hedgehog, which released for the Sega Genesis in 1991. The level is grassy and lush, with environmental features such as palm trees, vertical loops and cliffs, and is the home of numerous forest animals. Like the game's other levels, Green Hill Zone comprises three acts; in the third, Sonic fights antagonist Doctor Eggman before moving to the second level, Marble Zone. It was constructed by level designer Hirokazu Yasuhara with its musical theme by Masato Nakamura.
Sonic X-treme was a platform game developed by Sega Technical Institute from 1994 until its cancellation in 1996. It was planned as the first fully 3D Sonic the Hedgehog game, taking Sonic into the 3D era of video games, and the first original Sonic game for the Sega Saturn. The storyline followed Sonic on his journey to stop Dr. Robotnik from stealing six magic rings from Tiara Boobowski and her father. X-treme featured open levels rotating around a fixed center of gravity and, like previous Sonic games, featured collectible rings and fast-paced gameplay.
Sonic the Hedgehog: Triple Trouble is a 1994 platform game developed by Aspect and published by Sega for the Game Gear. It is the sequel to Sonic Chaos (1993) and features classic side-scrolling Sonic gameplay. The player controls either Sonic the Hedgehog or Miles "Tails" Prower as they venture to protect the powerful Chaos Emeralds from Doctor Robotnik, Knuckles the Echidna, and series newcomer Nack the Weasel. Sonic and Tails' unique abilities, as well as various power-ups, can assist the player in gameplay.
Sonic the Hedgehog is a video game series and media franchise created by the Japanese developers Yuji Naka, Naoto Ohshima, and Hirokazu Yasuhara for Sega. The franchise follows Sonic, an anthropomorphic blue hedgehog who battles the evil Doctor Eggman, a mad scientist. The main Sonic the Hedgehog games are platformers mostly developed by Sonic Team; other games, developed by various studios, include spin-offs in the racing, fighting, party and sports genres. The franchise also incorporates printed media, animations, feature films, and merchandise.
Sonic the Hedgehog 2 is a 1992 platform game developed by Sega Technical Institute (STI) for the Sega Genesis. Players control Sonic as he attempts to stop Doctor Robotnik from stealing the Chaos Emeralds to power his space station. Like the first Sonic the Hedgehog (1991), players traverse side-scrolling levels at high speeds while collecting rings, defeating enemies, and fighting bosses. Sonic 2 introduces Sonic's sidekick Miles "Tails" Prower and features faster gameplay, larger levels, a multiplayer mode, and special stages featuring pre-rendered 3D graphics.
A fan game is a video game that is created by fans of a certain topic or IP. They are usually based on one, or in some cases several, video game entries or franchises. Many fan games attempt to clone or remake the original game's design, gameplay, and characters, but it is equally common for fans to develop a unique game using another as a template. Though the quality of fan games has always varied, recent advances in computer technology and in available tools, e.g. through open source software, have made creating high-quality games easier. Fan games can be seen as user-generated content, as part of the retrogaming phenomena, and as expression of the remix culture.
Sonic Generations is a 2011 platform game developed by Sonic Team and published by Sega for the PlayStation 3, Xbox 360, Windows, and Nintendo 3DS. 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 and travel through levels from previous Sonic games. 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 (2008) and Sonic Colors (2010).
Sonic Mania is a 2017 platform game published by Sega for Nintendo Switch, PlayStation 4, Xbox One, and Windows. Produced in commemoration of the Sonic the Hedgehog series' 25th anniversary, Sonic Mania pays homage to the original Sega Genesis Sonic games, featuring speedy side-scrolling gameplay. It takes place over 13 levels, including several redesigned from past games. The story follows Sonic, Tails and Knuckles as they venture to defeat Doctor Eggman and his robotic henchmen, the Hard-Boiled Heavies.
Sonic Forces is a 2017 platform game developed by Sonic Team and published by Sega. It was produced in commemoration of the 25th anniversary of the Sonic the Hedgehog franchise. The plot focuses on Sonic the Hedgehog joining a resistance movement formed by his friends, alongside its rookie and his misplaced past self. Together, they must stop Doctor Eggman, who has conquered most of the world alongside Infinite, his newest lackey who has been empowered by the Phantom Ruby. It features three gameplay modes: "Classic", side-scrolling gameplay similar to the original Sega Genesis Sonic games, "Modern", 3D gameplay similar to Sonic Unleashed (2008) and Sonic Colors (2010), and a mode featuring the "Avatar", the player's custom character.
The Retro Engine, also known as the Retro Software Development Kit, is a multiplatform game engine developed by Australian programmer Christian Whitehead, used in games from Sega's Sonic the Hedgehog series.
Sonic the Hedgehog: Project '06, or simply Sonic P-06, is an upcoming platform game developed by Argentine programmer Ian "ChaosX" Moris for Microsoft Windows. It is an unofficial remaster of the 2006 video game Sonic the Hedgehog, originally developed by Sonic Team and published by Sega.
Sonic Origins is a 2022 video game compilation. It features remasters of the first four platform games in Sega's Sonic the Hedgehog series—Sonic the Hedgehog (1991), Sonic the Hedgehog 2 (1992), Sonic CD (1993), and Sonic the Hedgehog 3 & Knuckles (1994)—originally released for the Sega Genesis and the Sega CD. The games are playable in their original format and a new widescreen format that removes lives. Origins adds additional game modes and missions, which allow players to unlock content in a museum.
There's even a fan-made "long version" of Sonic 2 that "restores" Genocide City Zone.