GGUK have been using this iGun Con app recently. It’s good, it’s FREE and it works!
Namco Bandai Game released iGunCon, a free app that lets players use their iPhone 4 or iPad 2 as a controller for the hot shooting titles Time Crisis 2 Strike for iPhone and iPod touch,Time Crisis 2 Strike HD for iPad and Time Crisis 2 Strike on the Mac App Store.
Players can download iGunCon on their iPhone 4 or iPad 2 for free, then link it with another iPhone, iPod touch, iPad or Mac that is running Time Crisis 2 Strike and they will sync up, allowing them to enjoy the game in a whole new way. The device running iGunCon will display a Trigger, Action and Reload areas, while the device running Time Crisis 2 Strike will show crosshairs. Players can line the crosshairs up with enemies and tap the Trigger area to shoot your way through multiple pulse-pounding game modes.
In addition to Controller Mode, the app has a standalone feature called Toy Mode that allows gamers to recreate the shooting sounds from Time Crisis series of games, including the three classic types of GunCon usable in Controller Mode as well as international models. Players can pick their favorite version, and tap the on-screen buttons to play the sounds of the in-game handgun, machine gun, shotgun and grenade launcher.
Take a hop, skip and jump to check out the Japanese trailer.