|GPU:||Imagination PowerVR G6430 (quad-core graphics)|
The X-Files on the Apple iPhone 5S runs at a very respectable median FPS of 59. This is a solid option to try if you have a iPhone 5S.
The X-Files's battery life on the Apple iPhone 5S is pretty good! You can play it for 3-5 hours before your battery dies. Try this out if you're not concerned about battery life.