Empires of Sand is an online mobile game, management and tower defense strategy game, you have to defend and manage your main city, construct new buildings, gain the favor of Osiris, research upgrades for your troops and use them in battle to get your empire back, is free to play on Android and iOS devices, from Codigames.
Download the game at:
https://play.google.com/store/apps/details?id=com.codigames.empiresofsand
https://itunes.apple.com/ca/app/empires-of-sand/id815552376?mt=8