First things first -- the E3 show floor is literally the worst place imaginable in which to play a survival horror game. Whatever suspense or atmosphere Shattered Memories attempted to build was utterly destroyed by Gwen Stefani's voice blasting out of an unseen speaker at eighty decibels. It is very difficult to feel truly terrified while you're subconsciously trying to shut out the sounds of No Doubt.
That said, though, Shattered Memories did actually provide a couple of suspenseful moments. Since Harry Mason has literally no weapons of any sort.