Clive:
Why does this game get its hooks into my brain so effectively? Why does it feel so much more visceral?
I think it's because Mirror's Edge is the first game to hack your proprioception.
That's a fancy word for your body's sense of its own physicality — its "map" of itself. Proprioception is how you know where your various body parts are — and what they're doing — even when you're not looking at them. It's why you can pass a baseball from one hand to another behind your back; it's how you can climb stairs without looking down at your feet.Most first-person shooters do not create any sense of proprioception. You may be looking out the eyes of your character, but you don't have a good sense of the dimensions of the rest of your virtual body — the size and stride of your legs, the radius of your arms. At most, you can see your arms carrying your rifle out in front of you. But otherwise, the designers treat your body as if it were just a big, refrigerator-size box.

Mirror's Edge, in contrast, does something very subtle, but very radical. It lets you see other parts of your body in motion...
When you run, you see your hands pumping up and down in front of you. When you jump, your feet briefly jut up into eyeshot — precisely as they do when you're vaulting over a hurdle in real life. And when you tuck down into a somersault, you're looking at your thighs as the world spins around you...
My Thoughts:
I could not agree more that the game activates, or at least messes with one's sense of proprioception. Two nights ago I wanted to show the game to some friends, I gleefully demoed it for them using my HD projector (6 foot picture). After about five minutes I paused and asked if anyone else wanted a go. Alas they all looked as though they were about to vomit (likely for the same reasons Clive felt sick). I however was fine. They all passed on playing, and asked if I would turn it off. The following night I played for at least 2 hours straight without any motion sickness. Towards the end of my session I could feel my concentration slipping, my moves were getting sloppy, it was time to give it a rest. I kept playing though, for about another 10 minutes, at which point I did experience the aforementioned wave of nausea. I'm I'm wondering is whether there is a link.
Could it be that a high level of concentration, and the suspension of disbelief required to put yourself in Faith's little red shoes, counteracts the disembodied feeling the game imparts on passive watchers and possibly less easily engaged players? When I am playing does my body believe that what I see is actually happening? Is it weird that I close my eyes each time I fall from a building, closing my senese to the experience of death?
Man, I love where games are heading, proprioception and all...


