See if you can exterminate all the aliens in this defensive shooting game. You are the only one left from your fleet and the enemies clearly outnumber you. They will be coming in waves and there is little you can do about it. But there is still hope for survival as you have the greatest turret technology there is. Their ships are like tin cans to your advanced armaments. But you need time to built your defenses in between waves. In the miniclip game, the enemies will be coming from the top and your first turret is found below the screen. Aim with the crosshair and shoot by left clicking. You can shoot rapidly by holding on the left mouse button. Buy more weapons and maximize their power after every level.