Man, every time I see this thread I cry a little.
I really like this game, I tried the demo during the free weekend but I'm freaking BROKE. I loved wall running, jumping, the grappling hook, and the shooting mechanics. It's like the closest thing I'll ever get to the dynamic movement mechanics of Evolve. And the titans daaamn.
I was a bit put off by the poor performance I got, but I found some optimization guides on YouTube and I figured I could actually get it to work decently, but the price tag is still a bit daunting