Empire - Four Kingdoms is a nice strategy game in which players have the role of creating their own kingdom and defending it against invaders of all kinds. There are 60 different types of buildings that can be placed inside your castle, covering roles from trading, collecting resources to defending your empire. The cool thing about this mobile game is that it allows you to expand the borders of your kingdom in order to fit larger buildings.
A very important aspect is to produce a good amount of resources because they are required when recruiting units for offense and defense. You can fight your enemies with the help from 50 different unit types and weapons. Just as you can attack other kingdoms, yours can be attacked as well, so be sure to have great defense capabilities. You can carry wars on others, alone or by teaming up with other players.
As you can expect, the chances of winning battles improve drastically when having help from another kingdom, but the spoils of war will be shared amongt the players on the winning side. Another way to have fun while playing Empire - Four Kingdoms is to take part in community events.