Infinity Blade is a fighting game developed by Chair Entertainment and Epic Games and released through the Apple App Store on December 9, 2010. It is the first iOS video game to run on the Unreal Engine. In the game, the unnamed player character fights a series of one-on-one battles in a derelict castle to face the immortal God King. When in battle, players swipe the screen to attack and parry, and tap the screen to dodge and block enemy attacks. Upon victory or defeat, the player restarts the game as the character's descendant with the same items and experience level.