User blog comment:IamJakuhoRaikoben/Chapter 454: Flying Dragon Squad and Osprey Squad, Review./@comment-4449950-20150929043128/@comment-2214433-20151001224154

I dunno what you mean by "track down", but the old one was quite the mess. They tried to merge several routes of the game and the result was... that. And even with the fact that it's, well, old, the animation was bad.

Now, the newest Unlimited Blade Works is not as good as Zero, story and character-wise, by far, but the animation makes it quite the eyecandy, at the very least. Too bad you tried looking up Archer's identity because it's indeed the UBW route that explores that. In fact, UBW is more of Archer and Rin's story than Shirou's... as ironic as that sounds.