Alien Anarchy

Step into the battle in the Alien Anarchy Tower Defense game.  The enemy is storming your gate and you must shoot them before they breach your defenses.  The more you kill the better you will be able to buy and upgrade more of your heavy and light weapons which will help you defend against the attack.  Its going to be a tough fight but you can do it.  Good luck and lets see how many levels you can survive.