Sonic the Hedgehog was created by Yuji Naka and designed by Naoto Ohshima as the new mascot for Sega to compete with Nintendo's Mario.
The original Sonic the Hedgehog video game was released for the Sega Genesis, introducing Sonic as a blue, speedy hedgehog to the gaming world.
Sonic Adventure launched on Sega Dreamcast, marking Sonic’s transition to 3D gameplay and a major evolution of the series.
The first live-action/CGI Sonic the Hedgehog movie was released, reaching a broad audience and revitalizing interest in the character.