Sonic the Hedgehog 4: Episode III

Sonic the Hedgehog 4: Episode III is a 2014 episodic platform video game in the Sonic the Hedgehog series, and the threequel to Sonic the Hedgehog 4: Episodes I, II, and Metal. The game was developed by Dimps, with assistance from Sonic Team, and published by Sega. The game was intended to emulate the original Sonic the Hedgehog games on the Sega Genesis.

Episode III was released in June 2014 for Microsoft Windows (via Steam), PlayStation Network, Xbox Live Arcade, Android, Nintendo 3DS and iOS, and in July 2015 for Ouya, and Nvidia Shield (as a preinstalled app). A version for the Windows Phone was slated to be released in July 2016, but was cancelled. A Wii U version was planned to be released, although it was cancelled due to hardware constraints. An additional episode, "Episode Gamma", which centers around E-102 Gamma, is available for those who purchase both episodes for the same system.

The game received mixed reviews from critics, although it was generally considered an improvement over Episodes I & II, with praise for the game's improved physics, co-op mechanics and visuals, but criticism for its boss fights and level design. A fourth and final game in the series, Sonic the Hedgehog 4: Episode FINAL, was planned.