Experience the true power of your iPhone and iPad with this app. Epic Citadel is a tech demo showing off the Unreal Engine and it definitely lives up to it’s name on the mobile device.
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iPhone App Video Review: Epic Citadel
The Unreal Engine 3 is on its way to the iPhone, though creators Epic Games have had to make some compromises to get there.
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How Epic fit the Unreal Engine into the iPhone (CNET)