Ximbieswaves games.

The zombies Assault the city with a swarm of zombies, change people on foot into zombies and make the biggest crowd.
Eat your companions, and challenge them to an insane race by obliterating everything in your way.

Zombie Wave has gladly surpassed million players all over the planet.

Zombie Wave is a game you truly need to claim" (TouchArcade)

Highlights one touc ongoing interaction to control the whole hord
Woozy rewards, ninjas, mythical beasts, UFOs, and some more