id's classic shooter has finally been (officially) ported to the iPhone. And thanks to oversight from John Carmack himself, there are a number of improvements that make it worth a purchase even for Jailbreakers.

In a blog post from May, Carmack says he loves that players port Doom to every device imaginable, but he's disappointed that there's rarely any real effort to build a new, functional control scheme on platforms without a keyboard and mouse. In other words, he'd rather that instead of everyone stopping at "Does it run Doom?" they ask "Does it play Doom?"

That's why he personally developed the controls for the iPhone version, and according to early reviews, the iPhone can now play Doom. Users are saying controls as good as you would expect from Carmack. Not to mention the other enhancements like 24-bit lighting.

Sure, you might have put the game on your jailbroken iPhone years ago, but graphical upgrades and tighter controls might make it worth the $6.99 admission price. [Recombu]

Send an email to Chris Jacob, the author of this post, at cjacob@gizmodo.com.