Gameloft's N.O.V.A. franchise is generally considered to be the best FPS series on the iPhone, and you can read full reviews of the original and sequel over at our mobile sister site. However, Gameloft have ported the multiplayer portion of the experience over to Facebook; using a downloadable Unity Engine Web Player to offer a host of maps, content and weapons in your browser.
As a freemium download, expect a fair amount of this content to be unlockable with Facebook Credits - though frankly, there's plenty of stuff for free.
Gameloft, a leading global publisher of digital and social games, released one of its flagship franchises in an original Facebook version titled N.O.V.A. Near Orbit Vanguard Alliance: Elite. This game is the first established FPS franchise to be developed specifically for this social network.
Surprisingly, it's really rather good. Let us know what you make of it!