Dead Trigger 2
Dead Trigger 2 is one of the most popular FPS games to date for iPhone or Android and with good reason. The gameplay is addicting, the graphics are simply unmatched, and zombies run wild. You'll love the lifelike physics, active lighting, and exceptional detail.
With 40 million people left on the planet and killer zombies walking the street you'll have an arsenal of high-powered weapons to fight off the hoards. You can unlock (or buy) additional weapons, like a chainsaw or Gatling gun, and mow down hoards of oncoming walkers.
With an evolving storyline and continuously being updated with more content, this is one of the best games to download. It's also one I show off to friends or family to showcase Android TV gaming graphics on my NVIDIA Shield. Be careful though, it can be so addicting you'll find yourself spending money on more weapons. The developers have another game called "Unkilled" worth considering too.