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.

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

Sonic 4 Episode 3 Was Planned By Sega But Was Cancelled - My

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

Sonic the Hedgehog 4 Episode 2 NOT Coming to WiiWare? - Rumor

Sonic the Hedgehog 4 - Page 2 - Games

Sonic the Hedgehog 4: Episode 1 News - GameSpot

Needlemouse Revealed!!!

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

Wah wah wah Sonic the Hedgehog 4! – Destructoid

Needlemouse Revealed!!!

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

Sonic the Hedgehog 4: Episode III, Video Games Fanon Wiki