City Siege 4. Alien Siege

City Siege 4: Alien Siege is a 2D side-scrolling shooter in which you can deploy various forces, rescue humans, and combat aliens. Earn money as you progress and acquire more and better troops.

The fourth installment of the City Siege series and the first to take place on a different planet Arm yourself with modern units and laser rifles to combat the nasty plants of this strange world. After all, they have important diamonds that we require, and there are other humans they kidnapped for you to save as well. Go off and kick some alien-plant butt! Advanced units and laser guns will be used to combat the nasty flora of this wild environment. After all, they have important diamonds that we require, and there are other humans they kidnapped for you to save as well. Go off and kick some alien-plant butt!