Asphalt 6: Adrenaline v1.1.6 for iPhone, iPod Touch. As far as I know, this is the most stable Asphalt 6 version for the iPhone and the iPod Touch, as it has smooth framerate and no bizarre bugs and glitches. Except that you don't get vehicles included in the latest version of the game, and that the game isn't optimised for the Retina display... For some reason. The file was found through here ; however, the website ceased public file hosting a while ago..
