The highly anticipated sci-fi action first person shooter N.O.V.A. - Near Orbit Vanguard Alliance [App Store] was released mere moments ago much to the excitement of forum members in the NOVA thread. With a single player campaign that reportedly takes around 8 hours to finish, four player online multiplayer, and online leaderboards tracking performance both in game and (apparently coming soon) on the NOVA web site, NOVA does not disappoint.
App Store Link: N.O.V.A. - Near Orbit Vanguard Alliance, $6.99