Epic Games and NVIDIA presented the first public demonstration of Unreal Engine 3 running on Windows 8 and Windows RT during Asus’ press conference at the IFA 2012 electronics trade show in Berlin. The live, real-time demonstration of the Epic Citadel app was shown running on the lovely Asus Vivo Tab RT. You can see it below in the video. Epic also announced that Unreal Engine 3 licensees may access Windows RT code at the Unreal Developer Network, and senior technical artist and level designer, Alan Willard, will showcase the Unreal Engine 4 “Elemental” real-time demonstration at PAX Prime on September 1, at NVIDIA’s booth from 12.30 to 1.30pm. PDT.