Sonic The Hedgehog Is A Video Game Character And The Main Protagonist Of The Sonic Video Game Series Released By Sega, As Well As In Numerous Spin-Off Comics, Cartoons, And A Feature Film. The First Sonic Game Was Released On June 23, 1991, In Order To Provide Sega With A Mascot To Rival Nintendo’S Flagship Character Mario (See 1991 In Video Gaming). Since Then, Sonic Has Become One Of The World’S Best-Known Video Game Characters, With His Series Having Sold More Than 70 Million Copies. In 2005, Sonic Was One Of The First Game Character Inductees Into The Walk Of Game.