I got to play this yesterday, and I noticed things that made me smile so much. You play as ODSTs! The assault rifle has 60 bullets in a magazine once again after all these years. The art style looks like Bungie Halo. Really awesome stuff I must say. :D
I enjoyed the throw back immensely. One thing that threw me off (but didnt mind it) was the addition of newer halo aspects melded into older timeline. Such as covenant Lich ship or even the newer music they introduced in Spartan assault/strike.