Amazing! This was a huge improvement from the 2nd part! I really like the way the series getting better and better! In comparation to the first and second part this was REALLY addictive and interesting! The only thing that is kinda annoying about this is that if you buy all the weapons and try to kill all the people on the map you will have very many weapons left and be bored. What I mean is, that you could probably add more NPC's and some secret locations where they could be.
And you could also probably return the on explosion that we had in the 1st part. It was amazing seeing how half of the world was destroyed. Anyways, great job, can't wait to check the 4th part out! :3