In this game, the player is an elite police officer who is on duty to protect the world from alien invaders. The player has to battle other alien spacecraft in order to protect the Earth from the invasion.

You will need to protect the Earth from the alien invasion.

You will need to build a space station in order to do that.

You will need to protect the Earth from the invasion.

So if you're looking for an action-packed Android game that'll keep you entertained for hours, this app would be an ideal choice.