Rockstar has released a 'Lite' version of Grand Theft Auto: Chinatown Wars on the App Store.
This is essentially a demo or free trial for the Ł6 iPhone and iPod Touch game.
Chinatown Wars Lite contains the first three levels of the game. These introduce you to the underworld of Liberty City, and to Uncle Wu "Kenny" Lee: a man on a dangerous quest to overthrow the city's Triad gangs.
Check Eurogamer's Grand Theft Auto: Chinatown Wars DS review for the full story.