Guardians of Valor is an online mobile game, tower defense strategy game set in a beautiful and dangerous new world, is free to play on Android and iOS devices, from Empire Studios.
Download the game at:
https://play.google.com/store/apps/details?id=bh.empirestudios.gova&hl=en
https://itunes.apple.com/app/guardians-of-valor/id969013905