Sonic the Hedgehog 4 goes episodic this summer - GameSpot

Project Needlemouse revealed as side-scrolling sequel to speedster's original Genesis trilogy; Episode 1 confirmed for Wii, Xbox 360, PS3.
Sonic is back for his fourth installment in the classic 2D series, revamped from the ground up.

Editing Sonic the Hedgehog 2006 (lost build of Tokyo Toy Show tech

Sonic the Hedgehog 4 goes episodic this summer - GameSpot

Sonic the Hedgehog 4: Episode II Review - GameSpot

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Sonic the Hedgehog 4: Episode II (2012) - MobyGames

Sonic The Hedgehog 4: Episode I Review –

Editing Sonic the Hedgehog 2006 (lost build of Tokyo Toy Show tech

Sonic 4: Episode 2 Archives - Sonic Retro

Sonic the Hedgehog 4: Episode 1 Review - GameSpot

Sonic 4 Episode 1 » SEGAbits - #1 Source for SEGA News