Assemble the Ultimate Mega Mechs to battle the alien invaders. Travel to the amazon jungle where they had taken refuge and had their hideout. Now your mission is to infiltrate and destroy them to save the planet. It is going to be the beginning of a a great war. Make sure you prepare yourself with upgrade to your robot and be ready at all times. Will you be able to save the planet from uninvited guest in Ultimate Mega-Mechs? Enjoy and have fun in playing this free online game.