TBH, that game looks like a last-gen console port, complete with flat, low-res textures and blocky environments. Building a $400 PC isn't really advisable, though. I mean, you can match a console, but that's not a very good value point.
Hey TC, show me a console that will match those graphics while also having a fully functional Windows OS running in the background. Oh yeah, for only $400 as well. I'll need PS+ or XBL or whatever you come up with too, of course... So keep that in mind when you add up the price.