About a month ago, Gameloft's N.O.V.A. [$4.99/Lite/HD] received a nice update adding high resolution graphics and gyroscope aiming for players of their Halo-inspired first-person shooter with an iPhone 4. Today, their Call of Duty-inspired shooter Modern Combat: Sandstorm [$4.99/Lite/HD] gets the same treatment with its new update. Our impressions for this new update are pretty much the same that we had for the N.O.V.A. update last month, and what was once old feels relatively new again. The game looks as crisp as ever on the Retina Display, and gyroscopic aiming allows for much finer precision while leaving your hand free to mash away at the fire button.