I completed the story, got all guns, and played every mode.
Story mode: No spoilers here, but I will say this.
The story is fun to play, the levels are so nice looking to me, and there are random points where you will need to aim for heads or get swarmed. Plus if you die, you can use some of your credit(money) to buy a respawn. Which is nice if you were so close to beating it and you don't want to restart.
Story is a bit short, I beat it really quick and easy, but I believe there will be more added some day.
The voice acting at some points seems a bit weird, like when you are going to die he says nooooooo in a bit of a lazy voice.
and the beginning bothers me since the male still sounds like the female character. lol.
The enemies, all different, pretty much if you like killing floor you may like this. It seems to me like a Doom, Duke Nukem, Killing Floor, CoD zombies feel.
Every zombie has a different kind of ability that you need to keep your eye on while in small rooms.
A large selection of guns from shotguns, rifles, archery, and a freaking minigun. Whatever you like to mow zombies down with.
So far, I can't stop playing it, and once it gets co-op I may play it even more with friends.
As it is, 8/10 and hope I see more guns to get and more story added.