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: Episode 1 News - GameSpot

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

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

Sonic Mania review round-up: Sonic's big return to 2D leaves critics

Get Ready For A Sonic 4: Episode 2 Trailer - My Nintendo News

Sonic 4: Episode 2 Archives - Sonic Retro

Sonic 4 Is 2D and Episodic

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

Sonic The Hedgehog: Most Up-to-Date Encyclopedia, News & Reviews

Sonic the Hedgehog 4: Episode 1 - Game - Nintendo World Report

Sonic the Hedgehog 4: Episode 1 News - GameSpot

Sonic the Hedgehog 4: Episode 1 Reviews - GameSpot

Sonic the Hedgehog 4: Episode 1 - Game - Nintendo World Report

Sonic the Hedgehog 4: Episode I (Game) - Giant Bomb