Sonic the Hedgehog different media including animation, comic books, and a Hollywood film. The first "Sonic" game, "Sonic the Hedgehog", is a platform game released in 1991. Players control the anthropomorphic blue hedgehog Sonic, who can run and jump at high speeds using springs, ramps, and loops. Sonic must stop Dr. Robotnik from taking over the world using the Chaos Emeralds. "Sonic the Hedgehog 2" (1992) increased the overall size and speed of the series' gameplay and was the second best-selling Genesis game. It introduced Sonic's sidekick and best friend, Miles "Tails" Prower, who followed Sonic throughout the game, and allowed a second
Sonic the Hedgehog (1991 video game) and toys. "Sonic the Hedgehog" is one of the best-selling video game franchises of all time, with over 150 million copies sold by May 2014. The game's first stage, Green Hill Zone, has been used in several games, such as "Sonic Adventure 2", "Sonic Generations", "Sonic Mania", "Sonic Forces", and the "Super Smash Bros." series. The game's popularity inspired a number of unofficial variants, including "Somari", a pirated Nintendo Entertainment System conversion of the game featuring Nintendo's Mario character in levels from the original "Sonic" game, "Sonic the Hedgehog Megamix", a total conversion mod of the original game, and "Sonic