FOR THOSE WHO CAN'T PLAY THE GAME DUE TO UNITY NOT WORKING:
I managed to play it through a number of steps. For one, you should download Mozilla Firefox, as that is the only browser that I've gotten this to work on. webGL should be enabled by default on Firefox, so you don't have to worry about that. Go to this link: https://www.y8.com/games/range_of_the_dead
It's outside of Newgrounds, but I haven't been able to do anything to get it to work on here. It should work there. I don't think it's possible to use Unity webplayer to play this, but webGL worked for me.
Now for the actual review.
I'm going to compare this game primarily to lab of the dead, as this is its sequel and both were mobile games. Honestly, I didn't like this one as much as I did Lab of the Dead - the gameplay got kind of stale after a while, and there wasn't much replay value to the game after you completed the story mode. There also wasn't much story to the game in general, which I think put it behind Lab of the Dead. The challenge modes were a nice new take on the game, but you had to almost grind in the story mode to unlock them, and in the end I don't feel that they were worth the trouble.
All in all, this game is kind of meh. It kept me busy for a few hours, but I would much prefer Lab of the Dead and the other games in the series to this one.