They soon find her in the desert, but Eggman attacks them with the Egg Cerberus. Sonic then meets Tails at Castle Town, and they set off to find Elise. Despite Sonic's best efforts, Elise is captured, but she throws a Chaos Emerald to him before Eggman takes her away. Eggman attacks with his fleet of ships with the intent of kidnapping Elise, but Sonic intervenes and flees with Elise. In the city of Soleanna, Princess Elise is starting the Festival of the Sun. Sonic must rescue Elise from Eggman, attempt to stop a new hedgehog from the future, Silver, and travel through time to discover how Eggman, the weapon he seeks, and Silver the Hedgehog are connected. During a parade, the city is attacked by Doctor Eggman, who seeks the key to a dangerous weapon that would help him conquer the world. Princess Elise presides over the peaceful city of Soleanna. This is the second Sonic game to receive an E10+ rating after Shadow the Hedgehog. To disambiguate, the game has been called by a number of different aliases, including Sonic '06, Sonic 2006, Sonic 360, and Sonic Next Gen. The game shares its name with two earlier video games, a manga, a television series, a comic book series and, of course, Sonic the Hedgehog himself.

It was developed by Sonic Team, published by Sega and directed by Shun Nakamura.

Sonic the Hedgehog is a video game for PlayStation 3 and Xbox 360 that was made to celebrate the fifteenth anniversary of the Sonic the Hedgehog franchise.

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