Rockstar Games recently announced one of the biggest franchises in gaming will hit the iPod Touch and iPhone this fall with Grand Theft Auto: Chinatown Wars.

This is a huge coup for Apple s portable game market that, while extremely successful, has been plagued in recent months with questions of credibility stemming from the flood of 99-cent games in the iTunes App Store.

“Chinatown Wars is a perfect match for the iPhone and iPod touch,” said Sam Houser, Founder of Rockstar Games. “We are very excited to bring this incredibly ambitious version of Liberty City, with this level of detail and immersive gameplay on Apple’s new gaming platforms.”

Rockstar ‘ move is a huge vote of confidence in the iPhone OS as a platform of note, and an upcoming music game Beaterator will also have a port on Apple’s hardware. Waning sales of Chinatown Wars on Nintendo DS also has something to do with the game moving to PSP and now iPhone.