This app was mentioned in 2 comments, with an average of 1.50 upvotes
Zombie Warfare is very slow at the beginning. I had to wait, but it was so crazy scary. Just shoot two zombies and I quit.
Make sure to use headset, because audio adds a lot to the experience.
Plug and play.
Start with this> https://play.google.com/store/apps/details?id=com.fibrum.zombiewarfare&hl=en