GRave Defense HD – Amazon Free app of the day

In a post-apocalyptic world, zombies are out in full force–and only you can stop them! Battle bizarre monsters and obliterate mutant hordes across 20 levels of action In this twist on classic tower defense gameplay. Use rockets guns, and other weaponry to send the undead back to their graves!

Get it here
http://www.amazon.com/mobile-apps/b/ref=topnav_storetab_mas?ie=UTF8&node=2350149011
http://www.amazon.com/gp/product/B0057A6GA6?ie=UTF8&ref=mas_faad