Another Zombie Game
Another Zombie Game is, as you already guessed, another unity 3d game with zombies where you are the only one left in town and you must survive against endless zombies attacks. Your munition is very limited so you must shoot them with chirurgical precision. Also, after you earn some money, you can call for air support and so on. So, if you like this kind of unity 3d games with zombies, then you will play Another Zombie Game, surely.
To play Another Zombie Game, you will use A and D keys to move left or right, mouse to aim, left click to shoot, 1 key to refill ammo, 2 key to call air support, E key to use and R key to reload weapon.