Sonic the Hedgehog (ソニック・ザ・ヘッジホッグ Sonikku za Hejjihoggu?) is a platform video game developed by Sonic Team and published by Sega for the Sega Mega Drive/Genesis. First released in North America, Europe, and Australia on June 23, 1991, the game is the first installment in the Sonic the Hedgehog series, chronicling the adventures of the titular character in his quest to defeat the series' antagonist Dr. Robotnik. The game's story focuses on Sonic's efforts to stop Dr. Robotnik's plans for world domination, release the animals Dr. Robotnik has trapped, and collect six magical emeralds known as the Chaos Emeralds.Development of Sonic the Hedgehog began in 1990, when Sega ordered its AM8 development team to develop a game featuring a mascot for the company. After a hedgehog was decided on as the main character, the development group was renamed Sonic Team.Sonic the Hedgehog received positive reviews from critics, who praised the game's visuals and its sense of speed. It was commercially successful, increasing the popularity of the Mega Drive/Genesis and establishing Sonic the Hedgehog as the company's mascot. Its success led to the development of subsequent games in the Sonic the Hedgehog series, as well as the creation of a media franchise of spin-off products featuring the character.

Sonic The Hedgehog: The Lost Worlds is a hack of Sonic the Hedgehog 2 by ExecByte. This hack features all of the zones that were cut from Sonic 2 during development. Some zones have been ported from the Sonic 2 Simon Wai prototype and then finished up, and some have been created based on magazine pictures and information from interviews with people who worked on Sonic 2.

Sonic the Hedgehog refers to the Sonic the Hedgehog video game series released by Sega, and starring its eponymous mascot, the video game character Sonic the Hedgehog. The video game series is the primary product in a multimedia franchise, including products in a wide range of media.

Sonic the Hedgehog refers to the Sonic the Hedgehog video game series released by Sega, and starring its eponymous mascot, the video game character Sonic the Hedgehog. The video game series is the primary product in a multimedia franchise, including products in a wide range of media.

Sonic the Hedgehog refers to the Sonic the Hedgehog video game series released by Sega, and starring its eponymous mascot, the video game character Sonic the Hedgehog. The video game series is the primary product in a multimedia franchise, including products in a wide range of media.

Sonic the Hedgehog refers to the Sonic the Hedgehog video game series released by Sega, and starring its eponymous mascot, the video game character Sonic the Hedgehog. The video game series is the primary product in a multimedia franchise, including products in a wide range of media.

Sonic the Hedgehog - Westside Island is a palette and layout hack of Sonic the Hedgehog for the Sega Mega Drive. All levels have new layouts, new names and new palettes and the bosses have been made harder. In addition, the level select has been edited and you can now only start on Act 1 of each level from here. If you want to play Sonic 1 but with a new change of pace, this could be what you are looking for.

This hack based on Sonic 1, This game plays like Sonic 1 but with the speed of Sonic 2 with CD abilities. Like CD it promotes exploration, collecting stones will reward you and also give you good futures automatically. New special stages in the future. This will not be the final build, however I intend to get it playable and presentable for the contest. Thanks for checking out my entry!.Credits:Selbi - CD CameraNatsumi - Beta testerDandaman - Beta TesterSSRG community - Feedback and Suggestions Abyss

Sonic: The One Ring is a hack of the original Sonic the Hedgehog game for the Sega Mega Drive / Genesis, created by Mercury. Its defining (and titular) feature is that in each Act, all rings but one have been removed, and Sonic cannot complete the Act without this One Ring in his possession. Thus, in each Act, Sonic must search for the One Ring that will afford him the opportunity to progress. Several alterations have been made to the game, to somewhat balance the lack of rings, and allow backtracking during the search.

A hack based on Sonic 1 made by Ashuro.Credits:-MarkeyJester, for his ASM tutorials and helps.-FireRat, without him, which things would not have been possible.-FraGag, my Canadian neighbor who helped me to better understand the asm (because he speak French).-GenesisDoes, who helped me to understand how to import and work with objects in a rom.-ValleyBell, without him, which i could never make my own smps songs.-Natsumi, TheStoneBanana, StephenUK, PacGuy for being patient with me on the "Basic questions & answer thread".-Clownacy, a great moderator, thank you for the helps.-A-S-H, to improve me in my SMPS work.-Frenzy-Frenzless, my AFTERLIFE partner, who helped me to find gameplay ideas.-Mercury, because its ReadySonic open-source helped me to translate Github's ASM to Hivebrain 2005.-RedHotSonic, to have tested my previous rom-hack and helps.-ProjectFM for many things like some music and asm help.