City Siege 4: Alien Siege
The fourth installment of the City Siege franchise and the first to be set on another planet. Arm yourself with advanced units and lazer guns and take on the evil plants from this crazy world. After all they have valuable gems we need. Oh, and there are also some humans they abducted for you to save. Get out there and kick some alien-plant butt!
Use the mouse to navigate the menus and manage your army/buy new troops. In-Game Controls: Click the Drop Ship to deploy your troops. Use the mouse to aim-and-shoot and select troops. Use WASD or Arrow Keys to move troops around the level. Group your troops using the 'Grouping' button. Press [G] to toggle Grouping/Force Fire modes. Press [T] to Teleport your grouped troops to the selected Troop's positions. Press [+] or [-] to quickly switch between your troops.