It's a new PR. It's a parkour game, where it definitely targets a select audience, as well as a casual audience that wants something new. I can tell it has sort of a puzzle-like feel to it, choosing your own path. It's most likely a rental though as stated by Dynasty, unless you're a real hardcore parkour fan.
Seriously though, don't tell me you aren't somewhat exhilarated when you jump off a big ass high building only to land on a building that's 5000 feet lower and more miniscule. I was almost at the edge of my seat when I did a few moves like that. Of course, you could do it in real life and get the real adrenaline rush, but seriously, who wants to fall 5000 feet and miss and die? In Mirror's Edge, all you get is 'failed'.