SEGA's loveable blue mascot reaches another milestone today, celebrating his 21st anniversary.

On this day in 1991 SEGA unleashed Sonic the Hedgehog on North America. His speed and spectacular stunts made him an original, and players took him to their hearts. Nearly 50 games and over 80 million sales later, Sonic's still here.

Last year for the hedgehog's 20th anniversary we brought you plenty of spiky content, so be sure to read about The Sonic Games That Never Were, our Staff Memories of Sonic the Hedgehog and Sonic: The Nintendo Years Part One and Sonic: The Nintendo Years Part Two.

Happy birthday, you little scamp.