"Epic Citadel," Epic Games' visually-stunning free Unreal Engine 3 tech demo for Apple's iOS mobile devices, has been downloaded 1 million times from the App Store, signifying strong interest in the engine's mobile debut.
Speaking at the Korea Games Conference in Seoul, South Korea Tuesday, Epic Games confirmed that Citadel had reached the milestone after just releasing the app on September 1.
The demo allows users to navigate through a "fictional castle realm" on their Apple mobile devices, and observe UE3's technical capabilities on iOS. Epic Citadel supports iPhone 3GS, iPhone 4, third-generation iPod Touch, fourth-generation iPod Touch and iPad.
The Gears of War developer also confirmed that the Unreal Development Kit will be able to generate apps across all iOS devices, including iPad, iPhone and iPod Touch. Epic's first iOS UE3 game will be Project Sword, an action RPG-like game from subsidiary and Shadow Complex developer Chair Entertainment.
Epic is looking into bringing UE3 to other mobile mobile platforms, namely Google's Android OS. Studio VP Mark Rein said via his Twitter account, "We've demoed Unreal Engine 3 on Android [with] Tegra 2, and at [the Korea Games Conference] today we showed it on a Samsung Galaxy S device."
Rein said that he suspects UDK will "eventually" support the Android platform, "but iOS is the priority for now."
Florida developer and UE3 licensee Trendy Entertainment recently posted footage of its upcoming Xbox Live Arcade, PSN and mobile game Dungeon Defenders running on UE3 on iPhone and Android.
In South Korea Tuesday, Epic VP Jay Wilbur also announced a UE3 licensing deal with major Korean online game company Neowiz. Epic called the deal "one of the biggest Unreal Engine 3 licensing partnerships since Epic Games Korea's inception." Wilbur only revealed that Neowiz would "use Unreal Engine 3 for its next big projects."
Rein also confirmed that overall, UDK has "more than 350,000 installations, which is pretty amazing for a game engine."