And I have my tagline for how to describe it:
Mirror's Edge meets and improves Dead Island and marries Just Cause.
The parkour isn't a plot point- it's a mode of movement, and is fun in and of itself and very functional.
I just had my first boss fight... figuring out how to kill him was very fun. The survivor sense comes into play a lot there- to point out things that you might miss otherwise. And my final solution wasn't the only solution. And it had downsides. The boss went explody, and the noise called more zombies. Maybe I should have thought that through a bit more.
But after that, I'd made it to the point that the people are in Walking Dead, i.e. the zombies, while dangerous, aren't really scary.
... then it turned night.
It's been a while since I actually had a game scare me. I was FREAKING OUT! SO.MUCH.FUN!