Sonic the Hedgehog 4: Episode II (ソニック・ザ・ヘッジホッグ4フォー エピソードII Sonikku za Hejjihoggu Fō: Episōdo Tsū?) is a 2012 episodic platform video game in the Sonic the Hedgehog series, created as a direct follow-on from Sonic the Hedgehog 4: Episode I. The game was developed by Dimps, with assistance from Sonic Team, and is intended to emulate the original Sonic the Hedgehog titles on the Sega Genesis.
Episode II was released in May 2012 for PC (via Steam), PlayStation Network, Xbox Live Arcade, Android, and iOS, and in July 2013 for Ouya, and Nvidia Shield (as a preinstalled app). A version for the Windows Phone was slated to be released in July 2012, but was ultimately cancelled. An additional episode, "Episode Metal", is available for those who purchase both episodes for the same system. As of late 2014, the game is no longer available on iOS devices due to software incompatibility.