Soldier of Fortune: Payback – White screen when I run

The reason the app is still black is likely because it is still running. Try exiting to your Springboard (home screen) and double-tapping the home button, bringing up the multitasking bar. Find Infinity Blade, and hold down your finger on the icon. They will start to wobble, like you are rearranging apps. Press the little minus icon on the Infinity Blade icon - this quits the app. Tap anywhere on your home screen to return, and try launching Infinity Blade again.

The problem was solved many months ago. I just updated my graphics card driver and it worked.