There’s a reason that Apple usually invites Epic Games on stage. The developers’ mobile-only series, Infinity Blade and its sequels, shows off the gaming potential of any new iOS device by pushing its graphical potential to the very limits.

Infinity Blade games look beautiful no matter what device you run them on, but there’s a big difference graphically between playing Infinity Blade III on an iPad 2 and an iPad Air. If you happen to have a jailbroken device, though, a new jailbreak tweak will trick Infinity Blade into running at a higher graphical setting… apparently with little degradation of performance.

We got a glimpse of the incredible graphics and gameplay of Chair’s upcoming Infinity Blade III during the Apple’s keynote on Tueday, but Chair released a cinematic trailer for the new game this morning that dives into the Infinity Blade mythology of the first two games before setting up the narrative of the final chapter of Infinity Blade.

Unlike Infinity Blade: Dungeons – which was eventually canned after fans were left waiting over a year for the release – Infinity Blade III is ready to go and will launch in the App Store on September 18th for $6.99.  The game features seven huge new worlds, fire-breathing dragons, and enough swordplay to keep you entertained for weeks.

Take a look:

Remember that amazing trailer that Apple introduced on stage yesterday to show of its new iPhone 5s? It was Infinity Blade III, what Epic Games’ Donald Mustard called, “The conclusion of the epic Infinity Blade trilogy.”

If anything, the trailer below shows off just how amazing mobile gaming can look like. Just like the last two entries in the franchise, Infinity Blade III is pushing the envelope on environment size as well as visual and gaming performance. Here’s the video to feast your eyes on.

If we were to name our most anticipated iOS game, it would easily be Epic’s upcoming Infinty Blade: Dungeons, a spin-off of the popular franchise that takes Infinity Blade’s existing world and makes a Diablo-like action RPG out of it. Epic and Apple have been showing off Dungeons since May, and we even thought there was a good chance it would be released after the iPhone 5 keynote.

It wasn’t, and unfortunately, it doesn’t look like it will be released after next week’s iPad mini keynote either. In fact, it won’t even ship this year.

Despite the success of Gears of War on consoles, it is in fact Infinity Blade for iPad which holds the title for Epic Games’s most profitable game of all time. The popular sword fighter, which has been showcased at a number of Apple keynotes over the years, has earned a whopping $30 million since its debut just 18 months ago.

Some people count down the days until Christmas, but for me, Christmas is coming early this year with the December 1st debut of Chair Entertainment’s Infinity Blade 2, their widely-anticipated sequel to a game I still think is an elegiac action masterpiece.

I’ve only got another three weeks to wait, but in the meantime, Justin Davis over at IGN got a chance to take Infinity Blade 2 for a hands-on. What to expect? Don’t expect just a couple new areas, a few new helmets and a cool new sword or two. This isn’t just a phoned-in sequel, it’s a generational leap at least four times beefier than the first game… already one of the most sizable titles on the App Store.

If you’re an iOS gamer, you’re probably already familiar with Epic Games’ Unreal Engine 3, which already powers some stunning titles like Infinity Blade and Epic Citadel. You’ll be pleased to hear, then, that Epic is bringing its Unreal Engine 3 to the Mac.