So I must be really excited to finally get my hands on this game because I had a dream about it last night, however it wasn't exactly the same game. In fact, it was different enough that I'd say I've effectively come up with a cheap knock off that features more arcade style play..
In the dream the look of the game was a little more cartoon like, possibly even cell shaded (i'm trying to rush and get the ideas out of my head before I forget!). Instead of a 1st person view, it was all 3rd person but non of that RE4 over the shoulder stuff. Zombies were plentiful, some slow, some fast, but as mentioned previously the game had an arcadey feel to it in that you only had one gun, a shot gun, and weren't able to aim it traditionally. It was strictly point n shoot a-la original Wolfenstein/Doob games, just 3rd person.
The level my head created started off in a city but I kept wandering into a graveyard that seemed to have a small mountain pass behind it that, at the very top, i could see some sort of gate that seemed to call to me. Perhaps it was a passage to the next level? Perhaps there was a new weapon there? Who knows, I never made it up there alive. If the zombies didn't get me, the mini-boss did.. see, every time I went up the mountain path I'd come across this icon that was unavoidable and once touched, I was locked in a battle zone with a bigger than average baddie that took more than few hits to take down; definitely wasn't your average zombie but at least the battle zone was "safe" in that you weren't being attacked by your standard zombies. I believe there were some additional gameplay elements in this mini-boss battle, such as having to parry its attacks in order t successfully damage its weak point.. again, I never made it passed the damn thing, or at least not in the parts of the dream that I can remember.
Going back to the gameplay, and I'm adding this part in, perhaps it could have an aiming mechanic but in order to keep things tense, instead of dual-analog style aiming (one input for movement, one input for camera/aim controls), you had a dedicated button that would cease your movement in order to allow you to aim/adjust the camera. Example: the game keeps a slightly overhead 3/4 perspective, you can move in any direction and when hitting the shoot button you just blast whatever you're facing, but if you hold down the aim/camera button the view will drop slightly and get behind you but at the expense of not being able to move your character. That would effectively give the player a blind-spot in that you no longer can see behind, you so your best bet isn't to fire with precision but instead you're making these quick adjustments and have to constantly be on the move.
I see it being a small time game, maybe something as a downloadable title whether for handhelds or smartphones. Basically, picture a game like "Zombie Dash" but in 3D and you control your own movement.