https://www.theverge.com/2018/12/10/18135256/infinity-blade-ios-app-store-removed-epic

Infinity Blade, the medieval fighting / role-playing mobile game series from Epic Games, is no more, as the developer has removed all three entries in the franchise from Apple’s App Store. The series has been dormant since 2013, when Infinity Blade III was released and Epic and co-developer Chair Entertainment announced the third game would mark the end of the planned trilogy. However, Epic has continued to support the games throughout the last half-decade — until today, it seems.

In a statement, Epic says “it has become increasingly difficult for our team to support the Infinity Blade series at a level that meets our standards.” If you own the games, you can re-download them on any device by using an account that originally bought them. In-app purchases have been disabled, though Epic says the games should be available for the “foreseeable future.”