From Sonic Retro

Sonic the Hedgehog for Sega Genesis
The Sonic the Hedgehog series of games is a franchise of video games released by Sega (usually developed by their Sonic Team division) and starring their mascot character, Sonic the Hedgehog.

The series began in 1991 with the release of Sonic the Hedgehog on the Sega Mega Drive/Genesis. An 8-bit version of the game was also released for the Master System and Game Gear formats.

Yuji Naka (who would later become head of the Sonic Team division) was the main programmer for the first game. The "game planner" was Hirokazu Yasuhara. The music of the first two Sonic the Hedgehog games on the Mega Drive and Genesis was composed by Masato Nakamura of the Japanese band Dreams Come True.


The premise of the games revolves around Doctor Eggman (called Doctor Ivo Robotnik earlier outside of Japan) trying to conquer the Earth or other worlds. Sonic comes to the planet's aid, and is joined in later games by Miles "Tails" Prower, Amy Rose, Knuckles the Echidna, Cream the Rabbit, Team Chaotix and a host of other characters. He usually collects the Chaos Emeralds (usually from the Special Stages) in order to achieve the best ending in the game, as well as harness their power to take his most powerful form, Super Sonic. In this state, he is completely immune to all enemies and obstacles (although he can still be killed by falling into pits, being crushed and drowning), gains the ability of flight in certain circumstances, and the unique skill of breathing in space. However, Sonic's quest does not necessitate collecting the Emeralds himself; he must only prevent Eggman from getting them and dooming the world with their power. Sonic also has to deal with numerous other foes, such as Metal Sonic, Chaos, Fang the Sniper and Black Doom. Two of the major characters in the series are the anti-heroes Shadow the Hedgehog and Rouge the Bat. Shadow and Rouge are often rivals to Sonic, but in the end, the two help save the world.

From the Sega Master System and Game Gear to current platforms such as the Wii and Sony PlayStation 3, Sonic and company have appeared in more than 50 games, with the franchise still growing strong today.