The most interesting thing about the Reality Clash demos is how the game creates this virtual battlefield for you, almost like a virtual beacon arena. This means that you don't have to find physical objects or real buildings in the real world to dodge and hide behind, everything is virtual, but you are playing the battle in the physical world in a very real way. As in, you physically knock down in the real world to hide behind a virtual barrier in the game and take cover. It's incredibly convincing and means that you just need a little open space to fight with someone else in a very adrenalic and satisfying shootout.
Another really cool feature of Reality Clash is that, although it is designed for person-to-person interaction in the real world, you can also connect with other players on the Internet and fight even if you are in different parts of the world. You will be in your real world region, they will be in theirs wherever they are, but you will both be teleported to the same virtual arena to fight. I love the concept of Reality Clash and the performance from both a technical and an entertainment point of view is really impressive.