This game is basically Left 4 Dead series, Back 4 Blood, World War Z etc. but in mobile.
Though the gameplay is quite good, the mechanics and the controls (supports gyroscope which is really suprising considering its in alpha phase) are really easy to understand. This game is in third person perspectives like other based BR games that you know but you fight zombies and other mutations (gatling-head is my fav woops spoiler).You have an option to play campaign which are solo mission or play with other people but there's a problem. Everytime I'm matching the game always freeze or disconnect from the match. So I don't know what's the content for playing with other people so I don't have the "juices" to review that part yet. For the campaign part, it's a do-this-do-that kind of things. Very basic stuff (and hard too).
The graphics on the other hand are a total downer. Even in the lowest graphics you still manage to get heavy frame drops. I know this game is using Unreal Engine, in alpha state,requires SD835 and above but atleast make it optimized for low end players o' great devs!
But overall, I'll give it 4 stars since the graphics are the only thing that bothers me during gameplay but everything else is great. Try it for yourself.
Mentioned games