High Quality Content by WIKIPEDIA articles! Infinity Blade is an action role-playing iOS video game developed by Chair Entertainment and Epic Games released through the Apple App Store on December 9, 2010. It is the first iOS game to run on the Unreal Engine 3. Upon release it became the fastest-grossing app in the history of iOS, selling US$1.6 million in four days. It has received three major updates since its release and has been reviewed favorably by gaming critics. A sequel was announced on October 4, 2011.