Billy Frontier steps everything on the iPhone up to a whole new level. The game sets you out on an adventure to rid the west of vile alien scum that have taken over the area. Your job is to fix that problem through one of three game styles, all of which involve Billy taking down some alien scum with his gun.
The game takes full advantage of the iPhone's 3D graphics engine and really delivers an nice looking game. At it's heart, it's an onrails first person shooter with some other additions to it. You either press directly where you want to shoot or right below it (depending on your settings) and clear out area after area without dying.
The other modes in Billy Frontier involve pressing the correct sequence of buttons to defeat your enemies at a duel or simply shooting random objects that are being thrown into the air. Either way, you earn money and points, racking you up a high score to compete with your friends.
There are some parts of Billy Frontier that feel awkward, especially trying to get a good clean headshot in over a table. But besides that, this is an amazing step in the right direction. Hopefully more games will be made in this style too. This is definitely a must have app for the iPhone.