A free app for Android, by Binary Space.

The world is doomed to end because of the zombie outbreak!

Zombies are coming to life in the most dangerous places. The only thing that can stop them is an army of people with guns, which is why this is the ultimate zombie sandbox game.

With this game you can create your own outbreak. In the settings you can change the following parameters to customize your zombie outbreak, civilian numbers, initial zombie numbers,  undead speed, infection time (how long it takes for infected civilization to turn into zombies) and many more. 

Create the perfect disaster with this wonderful simulation game.