By Daniel Ionescu, PC World
N.O.V.A. 3 - Near Orbit Vanguard Alliance
N.O.V.A. 3 is probably the most polished first-person shooter in the App Store. As you would expect, the game is heavy on action and aliens, with up to five hours of guns blazing for a single-player campaign. The game is more fun in online multi-player mode, where you can take on up to 12-player battles and fight along your teammates in objective-based battles or against them in death matches.
Get this app ($6.99)