When was Sonic the Hedgehog 4: Episode I released?

Sonic the Hedgehog 4: Episode I was released on October 11, 2010.

What platforms is Sonic the Hedgehog 4: Episode I available on?

Sonic the Hedgehog 4: Episode I is available on BlackBerry OS, PlayStation 3, Wii, PC (Microsoft Windows), Xbox 360.

Who developed Sonic the Hedgehog 4: Episode I?

Sonic the Hedgehog 4: Episode I was developed by Dimps.

Sonic the Hedgehog 4: Episode I

About

The sequel fans have waited 16 years for is finally here - Sonic the Hedgehog 4 Episode I! Featuring enhanced gameplay elements, including the classic Sonic Spin Dash, and the versatile Homing Attack, Sonic the Hedgehog 4 Episode I picks up right where Sonic and Knuckles left off. Dr. Eggman’s back, and in an effort to finally rid himself of Sonic, he revisits – and improves – the very best of his creations. Get ready for the next chapter in an all new epic 2D saga built for old and new fans alike.

Storyline

With the Death Egg destroyed, Sonic heads off to explore new territories alone. However, antagonist Dr. Eggman has survived their last encounter, and has revisited and improved some of his creations from previous games, attempting to get rid of Sonic as the first part of his new grandiose scheme.