Thanks for the video!
I have been playing DayZ a zombie similator and it is in fact very immersive. I will be starting a server once I move on Dec 16th and so by the end of the year I will have a DayZ City of Heroes server. It is a First Person Shooter but it is VERY much dependant on stealth and not brute force.
It has vehicles and even helicopters! Lots of fun but you die - a LOT.