One of the top iPhone and iPad games of the last year -- Halfbrick's Jetpack Joyride -- is now available as a free Facebook app. As in the iOS original, you'll guide a man (Barry Steakfries) with a bullet-spewing jetpack on his back through a fast-moving, side-scrolling stage packed with heat-seaking missiles and electric traps.

It's a race to the top of the leaderboards, and the Facebook version includes everything from the iOS release, including the ability to customize Steakfries' look and equipment, as well as purchase and utilize the just-added gadgets that transform his skills. In-game coins are earned through gameplay and can also be purchased with Facebook credits (via real-life cash) to speed up the process, though Jetpack Joyride is plenty playable without spending a dime, and it's as much fun on Facebook as it was on Apple's devices.