Sonic the Hedgehog is a 2006 platform video game developed by Sonic Team and published by Sega for the PlayStation 3 and Xbox 360. It was released in late 2006 for Xbox 360, and early 2007 for PlayStation 3. The game primarily allows people to use Sonic, Shadow and Silver across several stages. Other secondary characters also become playable across the game. The plot follows Sonic's quest to protect Princess Elise after she is kidnapped by his rival Dr. Eggman and is aided by new and returning allies. The game shares its name with two earlier video games, a manga, a television series, a comic book series and their eponymous main character. To disambiguate, the game has been referred to as Sonic 2006 and Sonic '06. It was produced in commemoration of the 15th anniversary of the Sonic the Hedgehog series.