I played Brink for a while, and while it was fun, it tried to do too many things, and so it ended up doing none of them well. Its first-person parkour was just not as good as Mirror's Edge, and its first-person shooting wasn't as good as many of the other FPS games out there. What I would love to see in terms of multiplayer parkour type stuff would be some kind of Mirror's Edge-type game of tag. That would be a much better way to incorporate the parkour elements. I did like the visual design of Brink, though, so that's a point in its favor.