Sonic the Hedgehog
Due to the success of "Sonic" games on the Sega Genesis, the series was introduced to the Master System and the Game Gear. Sega began by releasing "Sonic the Hedgehog", a 2D platform game, in 1991. The game featured Sonic's ability to run and to jump at high speeds like its Mega Drive/Genesis counterpart but with notably different level design and music. Sega later released "Sonic the Hedgehog 2" another 2D platform game, in 1992. The game differed from its Genesis counterpart with different levels and music and by not including a "spin dash" maneuver. It also featured a different storyline in which Doctor Robotnik kidnaps Tails, who is non-playable in the Master System/Game Gear version. "Sonic Chaos"/"Sonic and Tails" (Japan), released in 1993, was similar to the earlier two Sega Master System/Game Gear "Sonic" games, but featured Tails as a playable character. A sequel, "Sonic Triple Trouble"/"Sonic and Tails 2" (Japan), a 2D platform game, was released in 1994 for the Game Gear and introduced a new character, Nack the Weasel, who, along with Knuckles and Doctor Robotnik, raced to collect the Chaos Emeralds. One of the last games for the Sega Game Gear, "Sonic Blast", was released in 1996 and featured prerendered sprites.
Sega Sammy Holdings
During 1985, Sega released "Hang-On", the world's first force feedback game. Sega Enterprises was registered stock on over-the-counter (OTC) market. In 1988, Sega Listed stock on the second section of Tokyo Stock Exchange. Within this year, Sega released the Sega Mega Drive/Genesis, a 16-bit home video game platform that solidified Sega’s presence in the console market. During this year, Sega also launched the R-360, the world's first amusement arcade cabinet could rotate 360 degrees in all directions. In 1991, Sega released "Sonic the Hedgehog" as a competitor mascot to represent Sega against Nintendo’s Mario, and with 15 million copies sold, Sonic the Hedgehog spawned multiple sequels over the years and became Sega’s flagship franchise.