If you're not familiar with Gamebryo, it's the middleware solution from Emergent Game Technologies. Right. The only thing you, the reader, really needs to know is that it's pioneering self-shadowed boobs. Subtly swaying, inhumanly massive boobs. This is the kind of stuff GDC attendees are most excited about—a pair of perfectly rendered double Ds struggling to be free of a metal bra while having realistic shadows cast upon them. It's also part of the reason GDC is 90% dudes.
Yes, GameTrailers has extended cuts and high definition versions. Just don't watch at work.