A free program for Android, by Wild Games.

Are you ready to become a ruler of all nations? Do you have what it takes to be the best leader in the world? It’s time to rule your empire, and there is no one better than you!

Call to Fight: Killing Event is an online multiplayer game. As the ruler of a nation, you have to develop and customize your empire. You can research technologies to gain stats boosts, and you can send troops to capture resources. 

If you want to fight with other players, you can join alliances and clans. You can also research and develop new weapons, armor, and other military equipment.