Game Tripod attack online

One day, space exploration has found an unidentified object that landed on the ground. Upon learning that it is an alien invasion, they gather a huge army and give battle alien creature. In this game, you have to play it for this alien creature called Tripod. Your main task is to destroy all the human host, and then the entire planet. You will step on a lot of military waves, so you do not have to be bored. For each traversed by a wave, you can improve your being, and thus make it even more, devastating. What will be the ending of this war, now depends on you. What are you waiting for, come to conquer Earth.