https://itunes.apple.com/us/app/gangster-gun-zombie-attack/id1438601495?mt=8

Zombies have invaded the city and the protectors are as unlikely as the dead. Play as a group of gangsters gone good guys and take down the hoards of evil zombies!

Features:

• Upgrade-able weapons

• Day & Night mode

• Enough levels to keep you occupied

• Unlock new & exciting weapons!

• Free to play & much more!