Telltale Games' The Walking Dead: Season One is a great game. It's a decision-based game where the choices you make during the zombie apocalypse affect what happens next. If you haven't played it, I highly recommend it.
If you have played it, however, good news! Season Two is out now for Android...kind of. It's actually exclusive to the Amazon Appstore and the Kindle Fire HDX/Fire TV for now, just like Season One was.