Expect an iPhone title from Id every other month, says co-founder John Carmack. The company plans to form three separate "lines" of iPhone titles, and at the ongoing QuakeCon event in Dallas, Carmack illuminated the company's extensive strategy for Apple's platform.Consumer weblog Kotaku reports the first line of iPhone games will focus on classics , as Id is doing withandon the platform. Carmack says more classics are in the works, likeand potentially evenThe second line of iPhone games will be strictly RPGs like, while the third will be games designed solely for iPhone. Carmack says Id will release some kind of-themed title, like a racer, according to the report.Carmack is also reportedly aiming to work with the company's Id Tech 5 engine, used in the development of, on the iPhone 3GS, believing it's fully possible.